{"id":11670,"date":"2026-06-10T10:35:18","date_gmt":"2026-06-10T10:35:18","guid":{"rendered":"https:\/\/www.kscranegroup.com\/?post_type=posts&#038;p=11670"},"modified":"2026-06-12T01:53:34","modified_gmt":"2026-06-12T01:53:34","slug":"anti-corrosion-coating-for-overhead-crane","status":"publish","type":"posts","link":"https:\/\/www.kscranegroup.com\/cs\/posts\/anti-corrosion-coating-for-overhead-crane\/","title":{"rendered":"Jak vybrat n\u00e1t\u011br pro mostov\u00fd je\u0159\u00e1b: Porovn\u00e1n\u00ed a schv\u00e1len\u00ed norem ISO 12944 C3-C5-M"},"content":{"rendered":"<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1448\" height=\"1086\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/06\/crane-anti-corrosion-coating-iso12944-guide-v2.png\" alt=\"\" class=\"wp-image-11685\"\/><\/figure>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><p>Obsah<\/p><nav><ul><li><a href=\"#before-choosing-a-coating-for-overhead-crane-know-what-your-crane-faces\">Ne\u017e si vyberete n\u00e1t\u011br pro mostov\u00fd je\u0159\u00e1b, zjist\u011bte, s \u010d\u00edm se v\u00e1\u0161 je\u0159\u00e1b setk\u00e1v\u00e1<\/a><\/li><li><a href=\"#surface-preparation-60-of-coating-life-hinges-on-this\">P\u0159\u00edprava povrchu \u2013 na tom z\u00e1vis\u00ed \u017eivotnost n\u00e1t\u011bru 60%<\/a><ul><li><a href=\"#how-to-choose-blast-cleaning-grade\">Jak vybrat stupe\u0148 \u010di\u0161t\u011bn\u00ed trysk\u00e1n\u00edm<\/a><\/li><li><a href=\"#what-is-the-optimal-roughness-depth\">Jak\u00e1 je optim\u00e1ln\u00ed hloubka drsnosti?<\/a><\/li><\/ul><\/li><li><a href=\"#core-comparison-how-to-choose-an-iso-12944-coating-scheme-for-environments-from-c-3-to-c-5-m-for-your-overhead-crane\">Porovn\u00e1n\u00ed z\u00e1kladn\u00edch prvk\u016f: Jak vybrat sch\u00e9ma n\u00e1t\u011bru dle normy ISO 12944 pro prost\u0159ed\u00ed od C3 do C5-M pro v\u00e1\u0161 mostov\u00fd je\u0159\u00e1b<\/a><ul><li><a href=\"#c-3-environment-general-industry-the-standard-for-most-indoor-overhead-cranes\">Prost\u0159ed\u00ed C3 (v\u0161eobecn\u00fd pr\u016fmysl) \u2013 standard pro v\u011bt\u0161inu vnit\u0159n\u00edch mostov\u00fdch je\u0159\u00e1b\u016f<\/a><\/li><li><a href=\"#c-5-environment-extreme-corrosion-chemical-offshore-tropical-coastal\">Prost\u0159ed\u00ed C5 (extr\u00e9mn\u00ed koroze) \u2013 chemick\u00e9, pob\u0159e\u017en\u00ed, tropick\u00e9 pob\u0159e\u017e\u00ed<\/a><\/li><\/ul><\/li><li><a href=\"#special-working-conditions-high-temperature-chemical-food\">Zvl\u00e1\u0161tn\u00ed pracovn\u00ed podm\u00ednky \u2013 vysok\u00e9 teploty, chemik\u00e1lie, potraviny<\/a><\/li><li><a href=\"#how-to-verify-if-the-coating-is-done-well-a-five-step-acceptance-checklist-for-procurement\">Jak ov\u011b\u0159it, zda je n\u00e1t\u011br proveden dob\u0159e: P\u011btikrokov\u00fd kontroln\u00ed seznam pro p\u0159ijet\u00ed zak\u00e1zky<\/a><ul><li><a href=\"#step-1-surface-preparation-inspection\">Krok 1: Kontrola p\u0159\u00edpravy povrchu<\/a><\/li><li><a href=\"#step-2-climatic-condition-check\">Krok 2: Kontrola klimatick\u00fdch podm\u00ednek<\/a><\/li><li><a href=\"#step-3-dry-film-thickness-dft\">Krok 3: Tlou\u0161\u0165ka such\u00e9ho filmu (DFT)<\/a><\/li><li><a href=\"#step-4-electric-spark-holiday-detection\">Krok 4: Detekce elektrick\u00e9 jiskry (dovolen\u00e1)<\/a><\/li><li><a href=\"#step-5-adhesion-test\">Krok 5: Zkou\u0161ka adheze<\/a><\/li><\/ul><\/li><li><a href=\"#common-coating-defects-judge-at-a-glance\">B\u011b\u017en\u00e9 vady povrchov\u00e9 \u00fapravy \u2013 posu\u010fte na prvn\u00ed pohled<\/a><\/li><li><a href=\"#what-we-have-done\">Co jsme ud\u011blali<\/a><\/li><li><a href=\"#faq\">FAQ<\/a><ul><li><a href=\"#faq-question-1781227688667\">Jak\u00fd je v\u00fdchoz\u00ed n\u00e1t\u011br pro standardn\u00ed vnit\u0159n\u00ed mostov\u00fd je\u0159\u00e1b?<\/a><\/li><li><a href=\"#faq-question-1781227696856\">M\u016f\u017eu prost\u011b pou\u017e\u00edt nejsiln\u011bj\u0161\u00ed syst\u00e9m bez ohledu na prost\u0159ed\u00ed?<\/a><\/li><li><a href=\"#faq-question-1781227706026\">Co je lep\u0161\u00ed, \u017e\u00e1rov\u00e9 zinkov\u00e1n\u00ed nebo lakov\u00e1n\u00ed?<\/a><\/li><li><a href=\"#faq-question-1781227719733\">Jak si mohu ov\u011b\u0159it, zda je n\u00e1t\u011brov\u00fd syst\u00e9m uv\u00e1d\u011bn\u00fd v\u00fdrobcem spolehliv\u00fd?<\/a><\/li><li><a href=\"#faq-question-1781227734072\">Na kolik let m\u016f\u017ee n\u00e1t\u011br zaru\u010dit, \u017ee nebude reziv\u011bt?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n\n\n<p>Vid\u011bl jsem to u\u017e p\u0159\u00edli\u0161 mnohokr\u00e1t: mostov\u00fd je\u0159\u00e1b, kter\u00fd je v provozu m\u00e9n\u011b ne\u017e p\u011bt let, za\u010d\u00edn\u00e1 vykazovat rez pod\u00e9l svar\u016f hlavn\u00edho nosn\u00edku, puch\u00fd\u0159e n\u00e1t\u011bru na spodn\u00ed p\u0159\u00edrub\u011b koncov\u00e9ho voz\u00edku a velk\u00e9 odlupuj\u00edc\u00ed se n\u00e1t\u011brov\u00e9 hmoty kolem otvor\u016f pro \u0161rouby. Kdy\u017e se objev\u00ed takov\u00e9 probl\u00e9my, z\u00e1kazn\u00edci se na n\u00e1s v\u017edy obracej\u00ed, abychom zjistili, co se s n\u00e1t\u011brem pro mostov\u00fd je\u0159\u00e1b pokazilo.<\/p>\n\n\n\n<p>Vy\u0161et\u0159ov\u00e1n\u00ed odhalilo, \u017ee je\u0159\u00e1b m\u011bl v\u0161echny spr\u00e1vn\u00e9 parametry \u2013 spr\u00e1vnou nosnost, rozp\u011bt\u00ed a t\u0159\u00eddu zat\u00ed\u017een\u00ed. Jedin\u00fdm probl\u00e9mem byl n\u00e1t\u011br. Byl aplikov\u00e1n jako \u201estandardn\u00ed pr\u016fmyslov\u00fd n\u00e1t\u011br\u201c se syst\u00e9mem C3 a celkovou tlou\u0161\u0165kou such\u00e9ho filmu (DFT) 160 \u03bcm. Skute\u010dn\u00fdm instala\u010dn\u00edm prost\u0159ed\u00edm v\u0161ak byla pob\u0159e\u017en\u00ed elektr\u00e1rna \u2013 jednozna\u010dn\u011b C4.<\/p>\n\n\n\n<p>Barva nebyla \u0161patn\u00e1. V\u00fdb\u011br ano.<\/p>\n\n\n\n<p>Tento \u010dl\u00e1nek v\u00e1m s t\u00edm pom\u016f\u017ee. Nebudeme se zab\u00fdvat zna\u010dkami barev \u2013 to je pr\u00e1ce v\u00fdrobce. Pov\u00edme si o tom, jak ur\u010d\u00edte pot\u0159ebnou t\u0159\u00eddu n\u00e1t\u011bru a jak ov\u011b\u0159it, zda je n\u00e1vrh v\u00fdrobce spr\u00e1vn\u00fd.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"before-choosing-a-coating-for-overhead-crane-know-what-your-crane-faces\">Ne\u017e si vyberete n\u00e1t\u011br pro mostov\u00fd je\u0159\u00e1b, zjist\u011bte, s \u010d\u00edm se v\u00e1\u0161 je\u0159\u00e1b setk\u00e1v\u00e1<\/h2>\n\n\n\n<p>V\u00fdchoz\u00edm bodem pro v\u00fdb\u011br n\u00e1t\u011bru nen\u00ed barva, ale prost\u0159ed\u00ed.<\/p>\n\n\n\n<p>Norma ISO 12944-2 definuje \u0161est kategori\u00ed korozn\u00ed agresivity pro ocelov\u00e9 konstrukce. U je\u0159\u00e1b\u016f spad\u00e1 kategorie 90% mezi kategorie C2 a C4. Z m\u00fdch zku\u0161enost\u00ed vypl\u00fdv\u00e1, \u017ee prost\u0159ed\u00ed, kter\u00e9 zhruba hodnot\u00edte jako \u201eobecn\u00e9\u201c, je pravd\u011bpodobn\u011b minim\u00e1ln\u011b kategori\u00ed C3.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Kategorie<\/th><th>Popis prost\u0159ed\u00ed<\/th><th>Typick\u00e9 um\u00edst\u011bn\u00ed<\/th><th>Pozn\u00e1mky<\/th><\/tr><\/thead><tbody><tr><td>C1<\/td><td>Vyt\u00e1p\u011bn\u00e9 budovy s \u010dist\u00fdm vzduchem<\/td><td>Kryt\u00fd<\/td><td>T\u00e9m\u011b\u0159 \u017e\u00e1dn\u00e9 (laborato\u0159e, elektronick\u00e9 d\u00edlny)<\/td><\/tr><tr><td>C2<\/td><td>Venkovsk\u00e9 oblasti s n\u00edzk\u00fdm zne\u010di\u0161t\u011bn\u00edm, m\u00edrn\u00e1 kondenzace<\/td><td>P\u0159edev\u0161\u00edm uvnit\u0159<\/td><td>Mont\u00e1\u017en\u00ed d\u00edlny, such\u00e9 sklady<\/td><\/tr><tr><td>C3<\/td><td>M\u011bstsk\u00e1 pr\u016fmyslov\u00e1 atmosf\u00e9ra, st\u0159edn\u00ed vlhkost, ur\u010dit\u00e9 emise SO\u2082<\/td><td>Vnit\u0159n\u00ed\/venkovn\u00ed<\/td><td>V\u011bt\u0161ina stroj\u00edren, b\u011b\u017en\u00fdch tov\u00e1ren<\/td><\/tr><tr><td>C4<\/td><td>Pob\u0159e\u017en\u00ed oblasti, bl\u00edzko chemick\u00fdch z\u00e1vod\u016f, vysok\u00e1 vlhkost, soln\u00e1 mlha<\/td><td>Vnit\u0159n\u00ed\/venkovn\u00ed<\/td><td>Pob\u0159e\u017en\u00ed d\u00edlny, elektr\u00e1rny, \u00fapravny vody, dokov\u00e9 sklady<\/td><\/tr><tr><td>C5-I<\/td><td>Neust\u00e1l\u00e1 kondenzace, pr\u016fmysl s vysok\u00fdm zne\u010di\u0161t\u011bn\u00edm<\/td><td>P\u0159edev\u0161\u00edm uvnit\u0159<\/td><td>Interi\u00e9ry chemick\u00fdch z\u00e1vod\u016f, mo\u0159\u00edc\u00ed d\u00edlny, galvanick\u00e9 d\u00edlny<\/td><\/tr><tr><td>C5-M<\/td><td>Bl\u00edzk\u00e9 mo\u0159e, vysok\u00e1 slan\u00e1 mlha, na mo\u0159i<\/td><td>Venkovn\u00ed<\/td><td>P\u0159\u00edstavn\u00ed termin\u00e1ly, plo\u0161iny na mo\u0159i, palubn\u00ed je\u0159\u00e1by na lodi<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>N\u011bkolik bod\u016f se \u010dasto p\u0159ehl\u00ed\u017e\u00ed:<\/p>\n\n\n\n<ul>\n<li><strong>\u201eVnit\u0159n\u00ed prost\u0159ed\u00ed = n\u00edzk\u00e1 koroze\u201c je b\u011b\u017en\u00fd omyl.<\/strong> V\u00fdpary \u0159ezn\u00fdch kapalin ve stroj\u00edrensk\u00fdch d\u00edln\u00e1ch obsahuj\u00ed s\u00edru a chl\u00f3r. Ve \u0161patn\u011b v\u011btran\u00fdch d\u00edln\u00e1ch m\u016f\u017ee b\u00fdt rychlost koroze ocelov\u00fdch konstrukc\u00ed vy\u0161\u0161\u00ed ne\u017e venku. Alkalick\u00e1 mlha b\u011bhem tuhnut\u00ed betonu urychluje korozi oceli \u2013 prvn\u00edmi d\u00edly, kter\u00e9 v nov\u00e9 tov\u00e1rn\u011b rezav\u00ed, jsou \u010dasto svorky je\u0159\u00e1bov\u00fdch kolejnic.<\/li>\n\n\n\n<li><strong>Jak\u00e1 vzd\u00e1lenost od mo\u0159e se pova\u017euje za \u201epob\u0159e\u017en\u00ed\u201c?<\/strong> ISO neud\u00e1v\u00e1 p\u0159esnou vzd\u00e1lenost. Na\u0161e zku\u0161enost: do 5 km od pob\u0159e\u017e\u00ed, zejm\u00e9na na n\u00e1v\u011btrn\u00e9 stran\u011b (sm\u011br monzun\u016f), se s n\u00ed zach\u00e1z\u00ed jako s C4. Pas\u00e1ty a aerosoly mo\u0159sk\u00e9 soli se mohou dostat do vnitrozem\u00ed v\u00edce ne\u017e 10 km.<\/li>\n\n\n\n<li><strong>Nejprve ur\u010dete kategorii korozivity a pot\u00e9 hovo\u0159te o n\u00e1t\u011brov\u00fdch syst\u00e9mech.<\/strong> Pokud tento krok p\u0159esko\u010d\u00edte, ud\u011bl\u00e1te chybu, a\u0165 u\u017e si pozd\u011bji vyberete jakoukoli barvu.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"surface-preparation-60-of-coating-life-hinges-on-this\">P\u0159\u00edprava povrchu \u2013 na tom z\u00e1vis\u00ed \u017eivotnost n\u00e1t\u011bru 60%<\/h2>\n\n\n\n<p>Tuto v\u011btu si z tohoto \u010dl\u00e1nku nejv\u00edc chci zapamatovat: Povlak nen\u00ed na ocelov\u00e9m plechu \u201ep\u0159ilepen\u00fd\u201c; je zaji\u0161t\u011bn mechanickou kotevn\u00ed silou.<\/p>\n\n\n\n<p>P\u0159\u00edprava povrchu je proto mnohem d\u016fle\u017eit\u011bj\u0161\u00ed ne\u017e zna\u010dka barvy. Projekt s pou\u017eit\u00edm \u0161pi\u010dkov\u00e9 dov\u00e1\u017een\u00e9 barvy se \u0161patnou p\u0159\u00edpravou povrchu bude m\u00edt krat\u0161\u00ed antikorozn\u00ed \u017eivotnost ne\u017e projekt s pou\u017eit\u00edm b\u011b\u017en\u00e9ho dom\u00e1c\u00edho epoxidu, ale se spr\u00e1vn\u011b provedenou p\u0159\u00edpravou povrchu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"how-to-choose-blast-cleaning-grade\">Jak vybrat stupe\u0148 \u010di\u0161t\u011bn\u00ed trysk\u00e1n\u00edm<\/h3>\n\n\n\n<p>Norma ISO 8501-1 definuje \u010dty\u0159i stupn\u011b. Z\u00e1kladn\u00ed t\u0159\u00eddou pro ocelov\u00e9 konstrukce je\u0159\u00e1b\u016f je <strong>Sa2.5 \u2013 Trysk\u00e1n\u00ed t\u00e9m\u011b\u0159 b\u00edl\u00e9ho kovu<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Stupe\u0148<\/th><th>Popis<\/th><th>Kvalitn\u00ed<\/th><th>Doporu\u010den\u00ed<\/th><\/tr><\/thead><tbody><tr><td>Sa1<\/td><td>Lehk\u00fd v\u00fdbuch<\/td><td>Odstra\u0148uje pouze uvoln\u011bnou rez a star\u00fd n\u00e1t\u011br<\/td><td>\u274c Nevztahuje se<\/td><\/tr><tr><td>Sa2<\/td><td>Komer\u010dn\u00ed v\u00fdbuch<\/td><td>Odstra\u0148uje v\u011bt\u0161inu rzi a okuj\u00ed; zbytky jsou povoleny maxim\u00e1ln\u011b na 1\/3 povrchu<\/td><td>\u274c Nedoporu\u010duje se<\/td><\/tr><tr><td>Sa2.5<\/td><td>T\u00e9m\u011b\u0159 b\u00edl\u00fd v\u00fdbuch<\/td><td>\u226595% povrchu ukazuje hol\u00fd kov; z\u016fst\u00e1vaj\u00ed pouze nepatrn\u00e9 st\u00edny<\/td><td>\u2705 Minim\u00e1ln\u00ed standard pro je\u0159\u00e1by<\/td><\/tr><tr><td>Sa3<\/td><td>V\u00fdbuch b\u00edl\u00e9ho kovu<\/td><td>100% hol\u00fd kov, jednotn\u00fd st\u0159\u00edb\u0159it\u011b b\u00edl\u00fd vzhled<\/td><td>Pouze pro prost\u0159ed\u00ed C5-M nebo imerzn\u00ed prost\u0159ed\u00ed<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Rozd\u00edl mezi Sa2,5 a Sa2 nen\u00ed jen v \u201e\u010distot\u011b\u201c, ale v <strong>kotevn\u00ed vzor<\/strong>\u2014mikroskopick\u00e1 drsnost.<\/p>\n\n\n\n<p>Z\u00e1kladn\u00ed n\u00e1t\u011br pronik\u00e1 do mikronov\u00fdch hlubok\u00fdch a prohlubn\u00ed ocelov\u00e9ho povrchu. Po zaschnut\u00ed je uzam\u010den jako kl\u00ed\u010d v z\u00e1mku. Bez tohoto ukotven\u00ed se lakov\u00fd film p\u0159ilne k oceli pouze pomoc\u00ed molekul\u00e1rn\u00edch sil. Zm\u011bna teploty nebo vibrace ocelov\u00e9ho plechu mohou tuto vazbu naru\u0161it. <strong>Ru\u010dn\u00ed brou\u0161en\u00ed (St2\/St3) nem\u016f\u017ee vytvo\u0159it tento kotevn\u00ed vzor<\/strong>\u2014dr\u00e1t\u011bn\u00fd kart\u00e1\u010d m\u016f\u017ee povrch vypadat leskle, ale ve skute\u010dnosti vytv\u00e1\u0159\u00ed le\u0161t\u011bn\u00fd, hladk\u00fd povrch, na kter\u00fd se barva nedok\u00e1\u017ee \u00fa\u010dinn\u011b p\u0159ichytit.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"what-is-the-optimal-roughness-depth\">Jak\u00e1 je optim\u00e1ln\u00ed hloubka drsnosti?<\/h3>\n\n\n\n<p>Optim\u00e1ln\u00ed hloubka kotevn\u00edho rozlo\u017een\u00ed je <strong>Rz 40-70\u03bcm<\/strong>P\u0159\u00edli\u0161 n\u00edzk\u00e1 (&lt;40 \u03bcm) zp\u016fsob\u00ed, \u017ee se z\u00e1kladn\u00ed n\u00e1t\u011br nezachyt\u00ed. P\u0159\u00edli\u0161 vysok\u00e1 (&gt;70 \u03bcm) m\u016f\u017ee zp\u016fsobit, \u017ee \u201evrcholy\u201c kotevn\u00edho vzoru vy\u010dn\u00edvaj\u00ed skrz vrstvu z\u00e1kladn\u00edho n\u00e1t\u011bru a st\u00e1vaj\u00ed se v\u00fdchoz\u00edmi body pro korozi.<\/p>\n\n\n\n<p>V praxi tov\u00e1rny na ocelov\u00e9 konstrukce pou\u017e\u00edvaj\u00edc\u00ed k trysk\u00e1n\u00ed hranatou ocelovou dr\u0165 (Grit) obvykle dosahuj\u00ed drsnosti v rozmez\u00ed Rz 50-65 \u03bcm. Pou\u017eit\u00ed kulat\u00fdch ocelov\u00fdch brok\u016f (Shot) vede k ni\u017e\u0161\u00ed drsnosti, proto se obvykle p\u0159im\u00edch\u00e1v\u00e1 ur\u010dit\u00fd pod\u00edl drti pro jej\u00ed \u00fapravu.<\/p>\n\n\n\n<p>Praxe v na\u0161\u00ed tov\u00e1rn\u011b: z\u00e1kladn\u00ed n\u00e1t\u011br mus\u00ed b\u00fdt nanesen do 4 hodin po otrysk\u00e1n\u00ed. Po 4 hodin\u00e1ch za\u010dne \u010derstv\u011b obna\u017een\u00e1 hol\u00e1 ocel oxidovat \u2013 tvo\u0159\u00ed se neviditeln\u00e1, velmi tenk\u00e1 oxidov\u00e1 vrstva, kter\u00e1 ji\u017e ovliv\u0148uje p\u0159ilnavost.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"core-comparison-how-to-choose-an-iso-12944-coating-scheme-for-environments-from-c-3-to-c-5-m-for-your-overhead-crane\">Porovn\u00e1n\u00ed z\u00e1kladn\u00edch prvk\u016f: Jak vybrat sch\u00e9ma n\u00e1t\u011bru dle normy ISO 12944 pro prost\u0159ed\u00ed od C3 do C5-M pro v\u00e1\u0161 mostov\u00fd je\u0159\u00e1b<\/h2>\n\n\n\n<p>Toto je nejd\u016fle\u017eit\u011bj\u0161\u00ed \u010d\u00e1st. Nejprve si ujasn\u011bte jeden \u010dast\u00fd omyl: <strong>Norma ISO 12944-5 nep\u0159edepisuje jednu \u201espr\u00e1vnou odpov\u011b\u010f\u201c pro ka\u017ed\u00e9 korozivn\u00ed prost\u0159ed\u00ed.<\/strong> Norma ve skute\u010dnosti uv\u00e1d\u00ed n\u011bkolik referen\u010dn\u00edch n\u00e1t\u011brov\u00fdch syst\u00e9m\u016f pro ka\u017edou t\u0159\u00eddu prost\u0159ed\u00ed a po\u017eadavek na trvanlivost \u2013 p\u0159edstavte si ji jako ov\u011b\u0159enou \u201enab\u00eddku mo\u017enost\u00ed\u201c, z nich\u017e ka\u017ed\u00e1 m\u00e1 sv\u016fj vlastn\u00ed form\u00e1ln\u00ed k\u00f3d (nap\u0159. A3.08, A3.11, A4.14). N\u00ed\u017ee uveden\u00e1 sch\u00e9mata p\u0159edstavuj\u00ed nej\u010dast\u011bji pou\u017e\u00edvan\u00e9 a n\u00e1kladov\u011b efektivn\u00ed kombinace vybran\u00e9 z nab\u00eddky ISO na z\u00e1klad\u011b zku\u0161enost\u00ed s re\u00e1ln\u00fdmi projekty.<\/p>\n\n\n\n<p>P\u0159i kontrole cenov\u00e9 nab\u00eddky doporu\u010dujeme polo\u017eit v\u00fdrobci dv\u011b ot\u00e1zky: \u201eNa kter\u00e9 sch\u00e9ma n\u00e1t\u011bru podle normy ISO 12944-5 odkazujete? Pro\u010d jste zvolili toto sch\u00e9ma pro m\u00e9 pracovn\u00ed podm\u00ednky?\u201c Dobr\u00fd v\u00fdrobce sv\u00e9 zd\u016fvodn\u011bn\u00ed vysv\u011btl\u00ed; pokud to nedok\u00e1\u017ee, je n\u00e1t\u011br pro mostov\u00fd je\u0159\u00e1b pravd\u011bpodobn\u011b nan\u00e1\u0161en \u201epocitov\u011b\u201c.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c-3-environment-general-industry-the-standard-for-most-indoor-overhead-cranes\">Prost\u0159ed\u00ed C3 (v\u0161eobecn\u00fd pr\u016fmysl) \u2013 standard pro v\u011bt\u0161inu vnit\u0159n\u00edch mostov\u00fdch je\u0159\u00e1b\u016f<\/h3>\n\n\n\n<p>C3 je stav, kter\u00fd se vyskytuje v prost\u0159ed\u00edch s certifikac\u00ed 90% stroj\u00edrensk\u00fdch d\u00edlen, mont\u00e1\u017en\u00edch linek a standardn\u00edch sklad\u016f. Norma ISO 12944-5 uv\u00e1d\u00ed n\u011bkolik voliteln\u00fdch n\u00e1t\u011brov\u00fdch syst\u00e9m\u016f pro prost\u0159ed\u00ed C3, p\u0159i\u010dem\u017e dva n\u00ed\u017ee uveden\u00e9 jsou v praxi nejb\u011b\u017en\u011bj\u0161\u00ed:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>K\u00f3d sch\u00e9matu<\/th><th>Vrstva<\/th><th>Typ barvy<\/th><th>Tlou\u0161\u0165ka such\u00e9ho filmu (DFT)<\/th><th>Po\u010det vrstev<\/th><th>Celkov\u00e1 DFT (minim\u00e1ln\u00ed)<\/th><th>Trvanlivost<\/th><\/tr><\/thead><tbody><tr><td><strong>A3.08<\/strong><\/td><td>Z\u00e1kladn\u00ed n\u00e1t\u011br<\/td><td>Epoxidov\u00fd zine\u010dnato-fosf\u00e1tov\u00fd z\u00e1kladn\u00ed n\u00e1t\u011br<\/td><td>80 \u03bcm<\/td><td>1<\/td><td>\u2265160 \u03bcm<\/td><td><strong>St\u0159edn\u00ed<\/strong> (5\u201315 let)<\/td><\/tr><tr><td><\/td><td>Vrchn\u00ed n\u00e1t\u011br<\/td><td>Alifatick\u00fd polyuretanov\u00fd vrchn\u00ed n\u00e1t\u011br<\/td><td>40 \u03bcm<\/td><td>2<\/td><td><\/td><td><\/td><\/tr><tr><td><strong>A3.11<\/strong><\/td><td>Z\u00e1kladn\u00ed n\u00e1t\u011br<\/td><td>Epoxidov\u00fd z\u00e1kladn\u00ed n\u00e1t\u011br s vysok\u00fdm obsahem zinku<\/td><td>60 \u03bcm<\/td><td>1<\/td><td>\u2265160 \u03bcm<\/td><td><strong>Vysok\u00fd<\/strong> (15+ let)<\/td><\/tr><tr><td><\/td><td>St\u0159edn\u011b pokro\u010dil\u00fd<\/td><td>Mezivrstva epoxidov\u00e9 sl\u00eddov\u00e9 \u017eelezn\u00e9 oxidy (MIO)<\/td><td>50 \u03bcm<\/td><td>1<\/td><td><\/td><td><\/td><\/tr><tr><td><\/td><td>Vrchn\u00ed n\u00e1t\u011br<\/td><td>Vrchn\u00ed n\u00e1t\u011br z polyuretanu pro stroj\u00edrenstv\u00ed<\/td><td>50 \u03bcm<\/td><td>1<\/td><td><\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Jak\u00e9 dal\u0161\u00ed sch\u00e9mata C3 jsou v norm\u011b ISO 12944-5?<\/strong> Krom\u011b v\u00fd\u0161e uveden\u00e9 tabulky norma zahrnuje alternativy, jako nap\u0159\u00edklad A3.02 (alkydov\u00fd syst\u00e9m, ekonomick\u00fd s ten\u010d\u00ed vrstvou, ale krat\u0161\u00ed ochranou) a A3.04 (akryl\u00e1tov\u00fd syst\u00e9m na vodn\u00ed b\u00e1zi). Zde se doporu\u010duj\u00ed A3.08 a A3.11, proto\u017ee pr\u016fmyslov\u00e9 mostov\u00e9 je\u0159\u00e1by maj\u00ed specifick\u00e9 po\u017eadavky na antikorozn\u00ed ochranu: minim\u00e1ln\u011b 5let\u00fd cyklus bez v\u011bt\u0161\u00edch oprav a stabiln\u00ed p\u0159ilnavost v prost\u0159ed\u00ed s vibracemi a olejovou mlhou. Epoxidov\u00e9 syst\u00e9my jsou v t\u011bchto podm\u00ednk\u00e1ch spolehliv\u011bj\u0161\u00ed ne\u017e alkydov\u00e9 nebo vodou \u0159editeln\u00e9 syst\u00e9my.<\/p>\n\n\n\n<p><strong>Jak si vybrat mezi t\u011bmito dv\u011bma sch\u00e9maty? Zam\u011b\u0159te se na dv\u011b v\u011bci:<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>A3.08 \u2014 Ekonomick\u00e1 volba.<\/strong> Z\u00e1kladn\u00ed n\u00e1t\u011br s fosf\u00e1tem zine\u010dnat\u00fdm neobsahuje zinkov\u00fd pr\u00e1\u0161ek. Pou\u017e\u00edv\u00e1 metodu \u201echemick\u00e9 pasivace\u201c \u2013 fosf\u00e1t zine\u010dnat\u00fd reaguje s ocelov\u00fdm povrchem a vytv\u00e1\u0159\u00ed pasiva\u010dn\u00ed film, kter\u00fd br\u00e1n\u00ed \u0161\u00ed\u0159en\u00ed rzi. Je levn\u00fd a snadno se aplikuje. <strong>Nev\u00fdhoda:<\/strong> Pokud je lakov\u00fd film lok\u00e1ln\u011b po\u0161kozen, toto m\u00edsto bude d\u00e1le rezav\u011bt a \u0161\u00ed\u0159it se (\u201ekoroze pod lakov\u00fdm filmem\u201c).<\/li>\n\n\n\n<li><strong>A3.11 \u2014 Volba dlouh\u00e9ho \u017eivota.<\/strong> Z\u00e1kladn\u00ed n\u00e1t\u011br s vysok\u00fdm obsahem zinku vyu\u017e\u00edv\u00e1 p\u0159\u00edstup \u201eob\u011btn\u00ed anody\u201c \u2013 zinek je reaktivn\u011bj\u0161\u00ed ne\u017e \u017eelezo a nejprve koroduje, aby ochr\u00e1nil ocel. I kdy\u017e je lakov\u00fd film po\u0161kozen, elektrochemick\u00e1 ochrana zinku zpomaluje \u0161\u00ed\u0159en\u00ed rzi. P\u0159idan\u00e1 epoxidov\u00e1 mezivrstva MIO obsahuje vlo\u010dkovit\u00fd sl\u00eddov\u00fd oxid \u017eelezit\u00fd, kter\u00fd se p\u0159ekr\u00fdv\u00e1 jako dla\u017edice a nut\u00ed molekuly vody a kysl\u00edku cestovat d\u00e1le, ne\u017e se dostanou k oceli, \u010d\u00edm\u017e vytv\u00e1\u0159\u00ed fyzickou bari\u00e9ru. Cena materi\u00e1lu pro A3.11 je zhruba <strong>20-30% vy\u0161\u0161\u00ed<\/strong> ne\u017e A3.08 [ODHAD], ale prodlu\u017euje dobu trv\u00e1n\u00ed ochrany ze st\u0159edn\u00ed (&lt;15 let) na vysokou (15+ let).\n<ul>\n<li><strong>Jednoduch\u00e1 rada:<\/strong> Pokud se ve va\u0161\u00ed d\u00edln\u011b celoro\u010dn\u011b vyskytuj\u00ed \u0159ezn\u00e9 kapaliny, \u010distic\u00ed prost\u0159edky, jak\u00e9koli chemick\u00e9 v\u00fdpary nebo vlhkost nad 60%, zvolte p\u0159\u00edmo A3.11. Ne\u0161et\u0159ete na n\u00e1t\u011brov\u00e9m materi\u00e1lu \u2013 n\u00e1klady na pr\u00e1ci p\u0159i nov\u00e9m n\u00e1t\u011bru za p\u011bt let je daleko p\u0159ekro\u010d\u00ed.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"c-4-environment-coastal-high-corrosion-industrial-near-the-sea-and-chemical-plants\">C4 Prost\u0159ed\u00ed (Pob\u0159e\u017en\u00ed \/ Vysoce korozn\u00ed pr\u016fmysl) \u2013 V bl\u00edzkosti mo\u0159e a chemick\u00fdch z\u00e1vod\u016f<\/h4>\n\n\n\n<p>Pokud je v\u00e1\u0161 mostov\u00fd je\u0159\u00e1b instalov\u00e1n do 5 km od pob\u0159e\u017e\u00ed, v bl\u00edzkosti chemick\u00e9ho z\u00e1vodu, v bl\u00edzkosti chladic\u00ed v\u011b\u017ee elektr\u00e1rny nebo v jak\u00e9koli oblasti s vysokou vlhkost\u00ed, pot\u0159ebujete sch\u00e9ma n\u00e1t\u011bru pro t\u0159\u00eddu prost\u0159ed\u00ed C4. Norma ISO 12944-5 nab\u00edz\u00ed n\u011bkolik referen\u010dn\u00edch syst\u00e9m\u016f pro C4, p\u0159i\u010dem\u017e nejpou\u017e\u00edvan\u011bj\u0161\u00ed jsou n\u00e1sleduj\u00edc\u00ed dva:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>K\u00f3d sch\u00e9matu<\/th><th>Vrstva<\/th><th>Typ barvy<\/th><th>Tlou\u0161\u0165ka such\u00e9ho filmu (DFT)<\/th><th>Po\u010det vrstev<\/th><th>Celkov\u00e1 DFT (minim\u00e1ln\u00ed)<\/th><th>Trvanlivost<\/th><\/tr><\/thead><tbody><tr><td><strong>A4.14<\/strong><\/td><td>Z\u00e1kladn\u00ed n\u00e1t\u011br<\/td><td>Epoxidov\u00fd z\u00e1kladn\u00ed n\u00e1t\u011br s vysok\u00fdm obsahem zinku<\/td><td>60 \u03bcm<\/td><td>1<\/td><td>\u2265200 \u03bcm<\/td><td><strong>St\u0159edn\u00ed<\/strong> (5\u201315 let)<\/td><\/tr><tr><td><strong>A4.14<\/strong><\/td><td>St\u0159edn\u011b pokro\u010dil\u00fd<\/td><td>Mezivrstva epoxidov\u00e9 sl\u00eddov\u00e9 \u017eelezn\u00e9 oxidy (MIO)<\/td><td>90 \u03bcm<\/td><td>1<\/td><td>&#8211;<\/td><td>&#8211;<\/td><\/tr><tr><td><strong>A4.14<\/strong><\/td><td>Vrchn\u00ed n\u00e1t\u011br<\/td><td>Alifatick\u00fd polyuretanov\u00fd vrchn\u00ed n\u00e1t\u011br<\/td><td>50 \u03bcm<\/td><td>1<\/td><td>&#8211;<\/td><td>&#8211;<\/td><\/tr><tr><td><strong>A4.09<\/strong><\/td><td>Z\u00e1kladn\u00ed n\u00e1t\u011br<\/td><td>Epoxidov\u00fd zine\u010dnato-fosf\u00e1tov\u00fd z\u00e1kladn\u00ed n\u00e1t\u011br<\/td><td>80 \u03bcm<\/td><td>1<\/td><td>\u2265280 \u03bcm<\/td><td><strong>Vysok\u00fd<\/strong> (15+ let)<\/td><\/tr><tr><td><strong>A4.09<\/strong><\/td><td>St\u0159edn\u011b pokro\u010dil\u00fd<\/td><td>Mezivrstva epoxidov\u00e9 sl\u00eddov\u00e9 \u017eelezn\u00e9 oxidy (MIO)<\/td><td>75 \u03bcm<\/td><td>2<\/td><td>&#8211;<\/td><td>&#8211;<\/td><\/tr><tr><td><strong>A4.09<\/strong><\/td><td>Vrchn\u00ed n\u00e1t\u011br<\/td><td>Vrchn\u00ed n\u00e1t\u011br z polyuretanu pro stroj\u00edrenstv\u00ed<\/td><td>50 \u03bcm<\/td><td>1<\/td><td>&#8211;<\/td><td>&#8211;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>A4.14 a A4.09 p\u0159edstavuj\u00ed dv\u011b r\u016fzn\u00e9 strategie protikorozn\u00ed ochrany.<\/strong> A4.14 (st\u0159edn\u011bdob\u00fd) pou\u017e\u00edv\u00e1 z\u00e1kladn\u00ed n\u00e1t\u011br bohat\u00fd na zinek (cesta s ob\u011btn\u00ed anodou) s celkovou DFT 200 \u03bcm a zes\u00edlenou mezivrstvou o tlou\u0161\u0165ce 90 \u03bcm. A4.09 (vysoce odoln\u00fd) d\u011bl\u00e1 opak: pou\u017e\u00edv\u00e1 z\u00e1kladn\u00ed n\u00e1t\u011br s fosf\u00e1tem zine\u010dnat\u00fdm (cesta chemick\u00e9 pasivace), ale dosahuje celkov\u00e9 DFT <strong>280 \u03bcm<\/strong> se dv\u011bma vrstvami mezivrstvy o celkov\u00e9 tlou\u0161\u0165ce 150 \u03bcm \u2013 v z\u00e1vislosti na fyzick\u00e9 bari\u00e9rov\u00e9 pevnosti. ISO uv\u00e1d\u00ed ob\u011b cesty jako sch\u016fdn\u00e9 mo\u017enosti pro C4. Volba nespo\u010d\u00edv\u00e1 v tom, kter\u00e1 je \u201espr\u00e1vn\u011bj\u0161\u00ed\u201c \u2013 jde o rovnov\u00e1hu mezi dobou trv\u00e1n\u00ed ochrany a rozpo\u010dtem: \u201etenk\u00fd zinkov\u00fd povlak\u201c je levn\u011bj\u0161\u00ed na za\u010d\u00e1tku, ale vy\u017eaduje d\u0159\u00edv\u011bj\u0161\u00ed v\u011bt\u0161\u00ed opravy, zat\u00edmco \u201esiln\u00e1 bari\u00e9rov\u00e1 vrstva\u201c m\u00e1 vy\u0161\u0161\u00ed po\u010d\u00e1te\u010dn\u00ed n\u00e1klady, ale del\u0161\u00ed \u017eivotnost.<\/p>\n\n\n\n<p><strong>Z\u00e1kladn\u00ed rozd\u00edl mezi C4 a C3 nespo\u010d\u00edv\u00e1 v typu z\u00e1kladn\u00edho n\u00e1t\u011bru, ale v celkov\u00e9 tlou\u0161\u0165ce such\u00e9 vrstvy (DFT) a pod\u00edlu mezivrstvy.<\/strong><\/p>\n\n\n\n<ul>\n<li>Celkov\u00e1 DFT (st\u0159edn\u011bdob\u00e1) u A4.14 je o 200 \u03bcm \u2013 o 40 \u03bcm v\u00edce ne\u017e u sch\u00e9matu C3, v\u0161e p\u0159idan\u00e9 do mezivrstvy.<\/li>\n\n\n\n<li>Celkov\u00e1 tlou\u0161\u0165ka such\u00e9ho filmu (DFT) p\u0159i A4.09 (vysoce odoln\u00e1) dosahuje 280 \u03bcm, p\u0159i\u010dem\u017e mezivrstva je nanesena ve dvou vrstv\u00e1ch o celkov\u00e9 tlou\u0161\u0165ce 150 \u03bcm \u2013 dv\u011b vrstvy vlo\u010dek MIO naskl\u00e1dan\u00fdch na sebe, co\u017e drasticky zvy\u0161uje cestu pro vodn\u00ed p\u00e1ru.<\/li>\n<\/ul>\n\n\n\n<p><strong>Zde je p\u0159\u00edklad z na\u0161eho projektu na Sr\u00ed Lance.<\/strong> Jednonosn\u00edkov\u00fd mostov\u00fd je\u0159\u00e1b evropsk\u00e9ho typu HD7,5t byl instalov\u00e1n ve skladu pob\u0159e\u017en\u00ed elektr\u00e1rny, necel\u00e9 2 km od Indick\u00e9ho oce\u00e1nu. Klient po\u017eadoval celkovou tlou\u0161\u0165ku n\u00e1t\u011bru <strong>\u2265460 \u03bcm<\/strong>\u2014180 \u03bcm v\u00edce ne\u017e u sch\u00e9matu pro dlouhodobou vrstvu ISO C4 (280 \u03bcm u A4.09). Pro\u010d? V d\u016fsledku kombinovan\u00e9ho \u00fa\u010dinku soln\u00e9 mlhy v Indick\u00e9m oce\u00e1nu, pr\u016fm\u011brn\u00fdch ro\u010dn\u00edch teplot nad 35 \u00b0C a celoro\u010dn\u00ed vlhkosti nad 801 TP1T by se n\u00e1t\u011br C3 za\u010dal tvo\u0159it puch\u00fd\u0159e za t\u0159i roky. Jak\u00fdkoli syst\u00e9m s tlou\u0161\u0165kou pod 300 \u03bcm by v tomto prost\u0159ed\u00ed nevydr\u017eel sedm let. Pro tento projekt, zalo\u017een\u00fd na standardn\u00edm t\u0159\u00edvrstv\u00e9m syst\u00e9mu (epoxidov\u00fd z\u00e1kladn\u00ed n\u00e1t\u011br s vysok\u00fdm obsahem zinku + epoxidov\u00fd mezin\u00e1t\u011br MIO + polyuretanov\u00fd vrchn\u00ed n\u00e1t\u011br), jsme p\u0159idali jednu vrstvu nav\u00edc, a to jak mezin\u00e1t\u011br, tak i vrchn\u00ed n\u00e1t\u011br, co\u017e vedlo k v\u00fdsledn\u00e9 nam\u011b\u0159en\u00e9 tlou\u0161\u0165ce such\u00e9 vrstvy (DFT) 478 \u03bcm. <strong>Tento p\u0159\u00edpad ilustruje, \u017ee referen\u010dn\u00ed sch\u00e9mata ISO jsou v\u00fdchoz\u00edm bodem, nikoli c\u00edlovou \u010d\u00e1rou \u2013 extr\u00e9mn\u00ed podm\u00ednky vy\u017eaduj\u00ed p\u0159izp\u016fsoben\u00e9 zahu\u0161\u0165ov\u00e1n\u00ed na z\u00e1klad\u011b standardn\u00edch sch\u00e9mat, nikoli striktn\u00ed dodr\u017eov\u00e1n\u00ed k\u00f3dov\u00e9ho \u010d\u00edsla.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c-5-environment-extreme-corrosion-chemical-offshore-tropical-coastal\">Prost\u0159ed\u00ed C5 (extr\u00e9mn\u00ed koroze) \u2013 chemick\u00e9, pob\u0159e\u017en\u00ed, tropick\u00e9 pob\u0159e\u017e\u00ed<\/h3>\n\n\n\n<p>C5 ji\u017e nen\u00ed tradi\u010dn\u00edm pr\u016fmyslov\u00fdm prost\u0159ed\u00edm. Pob\u0159e\u017en\u00ed doky, ropn\u00e9 plo\u0161iny a chemick\u00e9 zpracovatelsk\u00e9 haly \u2013 v t\u011bchto prost\u0159ed\u00edch vede selh\u00e1n\u00ed n\u00e1t\u011bru nejen ke korozi, ale i k hloubkov\u00e9 korozi, kter\u00e1 ohro\u017euje struktur\u00e1ln\u00ed integritu.<\/p>\n\n\n\n<p>Norma ISO 12944-5 poskytuje referen\u010dn\u00ed sch\u00e9mata pro C5 se 4\u20136 vrstvami, po\u010d\u00ednaje celkovou tlou\u0161\u0165kou such\u00e9ho filmu (DFT) 300 \u03bcm. Z\u00e1kladn\u00ed n\u00e1t\u011br mus\u00ed m\u00edt vysok\u00fd obsah zinku (such\u00fd film zinkov\u00e9ho pr\u00e1\u0161ku \u226580%). Mezivrstva pou\u017e\u00edv\u00e1 silnovrstv\u00fd epoxidov\u00fd n\u00e1t\u011br MIO nebo epoxid se sklen\u011bn\u00fdmi vlo\u010dkami (150 \u03bcm+). Vrchn\u00ed n\u00e1t\u011br mus\u00ed b\u00fdt chemicky odoln\u00fd. Standardn\u00ed mo\u017enosti zahrnuj\u00ed jak epoxidov\u00e9 z\u00e1kladn\u00ed n\u00e1t\u011bry s vysok\u00fdm obsahem zinku, tak anorganick\u00e9 zinkok\u0159emi\u010ditanov\u00e9 z\u00e1kladn\u00ed n\u00e1t\u011bry. Konkr\u00e9tn\u00ed volba z\u00e1vis\u00ed na podm\u00ednk\u00e1ch expozice (pr\u016fmyslov\u00e1 koroze C5-I vs. mo\u0159sk\u00e1 koroze C5-M) a na mo\u017enostech v\u00fdstavby na m\u00edst\u011b (anorganick\u00fd zinkok\u0159emi\u010ditan vy\u017eaduje p\u0159\u00edsn\u011bj\u0161\u00ed podm\u00ednky pro p\u0159\u00edpravu povrchu a vytvrzov\u00e1n\u00ed).<\/p>\n\n\n\n<p><strong>U vrchn\u00edho n\u00e1t\u011bru C5 existuje kompromis:<\/strong><\/p>\n\n\n\n<ul>\n<li><strong>Alifatick\u00fd polyuretan (PU):<\/strong> Nejlep\u0161\u00ed st\u00e1lost barvy a lesku v exteri\u00e9ru, nejodoln\u011bj\u0161\u00ed na UV z\u00e1\u0159en\u00ed, vhodn\u00e9 pro aplikace citliv\u00e9 na vzhled.<\/li>\n\n\n\n<li><strong>Polysiloxan:<\/strong> Odolnost v\u016f\u010di pov\u011btrnostn\u00edm vliv\u016fm p\u0159evy\u0161uje PU, vydr\u017e\u00ed venku 15 let bez v\u011bt\u0161\u00edch oprav, ale je v\u00edce ne\u017e dvojn\u00e1sobn\u00e1 a vy\u017eaduje p\u0159\u00edsn\u00e9 podm\u00ednky pou\u017eit\u00ed.<\/li>\n\n\n\n<li><strong>Chlorovan\u00fd kau\u010duk:<\/strong> Dobr\u00e1 odolnost v\u016f\u010di kyselin\u00e1m\/z\u00e1sad\u00e1m a m\u00edrn\u00e1 cena, ale omezen\u00e9 mo\u017enosti barev a n\u00edzk\u00e1 odolnost v\u016f\u010di organick\u00fdm rozpou\u0161t\u011bdl\u016fm.<\/li>\n<\/ul>\n\n\n\n<p>Dal\u0161\u00ed snadno p\u0159ehl\u00ed\u017een\u00fd po\u017eadavek pro prost\u0159ed\u00ed C5: <strong>P\u00e1sov\u00fd n\u00e1t\u011br na svary a hrany.<\/strong> Pracovn\u00edk nan\u00e1\u0161\u00ed ru\u010dn\u00ed \u0161t\u011btcem vrstvu na ka\u017ed\u00fd svar, okraj otvoru pro \u0161roub a ostr\u00fd roh. Tyto geometrick\u00e9 p\u0159echody maj\u00ed p\u0159irozen\u011b ten\u010d\u00ed filmy barvy; bez t\u00e9to dal\u0161\u00ed vrstvy se st\u00e1vaj\u00ed inicia\u010dn\u00edmi body pro korozi. Tento krok trv\u00e1 m\u00e9n\u011b ne\u017e p\u016fl hodiny, ale \u010dasto se vynech\u00e1v\u00e1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"special-working-conditions-high-temperature-chemical-food\">Zvl\u00e1\u0161tn\u00ed pracovn\u00ed podm\u00ednky \u2013 vysok\u00e9 teploty, chemik\u00e1lie, potraviny<\/h2>\n\n\n\n<p>Standardn\u00ed syst\u00e9my ISO 12944 nepokr\u00fdvaj\u00ed v\u0161echny sc\u00e9n\u00e1\u0159e. T\u0159i specifick\u00e9 podm\u00ednky vy\u017eaduj\u00ed specializovan\u00e9 n\u00e1t\u011brov\u00e9 syst\u00e9my.<\/p>\n\n\n\n<ul>\n<li><strong>Vysok\u00e1 teplota (ocel\u00e1rny\/sl\u00e9v\u00e1rny, dlouhodob\u011b &gt;120 \u00b0C).<\/strong> Teplota skeln\u00e9ho p\u0159echodu standardn\u00edho epoxidu je 100\u2013120 \u00b0C. P\u0159i vy\u0161\u0161\u00ed teplot\u011b za\u010d\u00edn\u00e1 povlak m\u011bknout a degradovat se. Spodn\u00ed p\u0159\u00edruba hlavn\u00edho nosn\u00edku hutn\u00edch mostov\u00fdch je\u0159\u00e1b\u016f, kter\u00e1 je vystavena z\u00e1\u0159en\u00ed z ocelov\u00fdch p\u00e1nv\u00ed, m\u016f\u017ee dos\u00e1hnout povrchov\u00fdch teplot 180\u2013250 \u00b0C. Toto prost\u0159ed\u00ed vy\u017eaduje n\u00e1t\u011brov\u00fd syst\u00e9m na b\u00e1zi silikonov\u00e9 prysky\u0159ice: anorganick\u00fd zinkok\u0159emi\u010ditanov\u00fd z\u00e1kladn\u00ed n\u00e1t\u011br odol\u00e1v\u00e1 400 \u00b0C a silikonov\u00fd hlin\u00edkov\u00fd vrchn\u00ed n\u00e1t\u011br odol\u00e1v\u00e1 200\u2013300 \u00b0C. Vyhn\u011bte se organick\u00fdm prysky\u0159ic\u00edm \u2013 p\u0159i vysok\u00fdch teplot\u00e1ch karbonizuj\u00ed a odlupuj\u00ed se.<\/li>\n\n\n\n<li><strong>Siln\u00e1 chemick\u00e1 koroze (d\u00edlny mo\u0159en\u00ed\/galvanick\u00e9 pokovov\u00e1n\u00ed\/povrchov\u00e9 \u00fapravy).<\/strong> Kysel\u00e1 a alkalick\u00e1 mlha ve vzduchu chemicky napad\u00e1 n\u00e1t\u011br \u2013 nezp\u016fsobuje korozi, ale p\u0159\u00edmo rozpou\u0161t\u00ed lakov\u00fd film. Syst\u00e9m C5 m\u016f\u017ee tento proces pouze \u201ezpomalit\u201c; nem\u016f\u017ee poskytnout dlouhodobou ochranu. Doporu\u010dujeme <strong>epoxidov\u00e9 fenolov\u00e9 silnovrstv\u00e9 n\u00e1t\u011bry<\/strong>Aplikujte je v jedn\u00e9 vrstv\u011b do 150 \u03bcm, po dobu 3\u20134 vrstev, s c\u00edlem dos\u00e1hnout celkov\u00e9 tlou\u0161\u0165ky such\u00e9ho filmu (DFT) p\u0159es 400 \u03bcm. Kl\u00ed\u010dem je vytvrzov\u00e1n\u00ed \u2013 fenolick\u00fd epoxid vytvrzuje p\u0159i pokojov\u00e9 teplot\u011b velmi pomalu a vy\u017eaduje vypalov\u00e1n\u00ed nebo nucen\u00e9 v\u011btr\u00e1n\u00ed.<\/li>\n\n\n\n<li><strong>Potraviny\/farmaceutika (\u010dist\u00e9 d\u00edlny).<\/strong> Pokud je je\u0159\u00e1b instalov\u00e1n v \u010dist\u00e9 m\u00edstnosti spl\u0148uj\u00edc\u00ed normy GMP, prim\u00e1rn\u00edm z\u00e1jmem nen\u00ed ochrana proti korozi, ale to, aby se n\u00e1t\u011brov\u00fd film neodlupoval a nekontaminoval v\u00fdrobek. Prvn\u00ed volbou je konstrukce z nerezov\u00e9 oceli, pokud to rozpo\u010det dovol\u00ed. Pokud se pou\u017e\u00edv\u00e1 sch\u00e9ma uhl\u00edkov\u00e9 oceli s n\u00e1t\u011brem, mus\u00ed b\u00fdt\u2026 <strong>b\u00edl\u00fd epoxid potravin\u00e1\u0159sk\u00e9 kvality (s certifikac\u00ed FDA)<\/strong>Povrch barvy mus\u00ed dos\u00e1hnout zrcadlov\u011b hladk\u00e9ho povrchu pro snadn\u00e9 \u010di\u0161t\u011bn\u00ed. Polyuretanov\u00e9 vrchn\u00ed n\u00e1t\u011bry nelze pou\u017e\u00edt \u2013 po dlouhodob\u00e9m UV st\u00e1rnut\u00ed se mohou k\u0159\u00eddovat a pr\u00e1\u0161it.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-to-verify-if-the-coating-is-done-well-a-five-step-acceptance-checklist-for-procurement\">Jak ov\u011b\u0159it, zda je n\u00e1t\u011br proveden dob\u0159e: P\u011btikrokov\u00fd kontroln\u00ed seznam pro p\u0159ijet\u00ed zak\u00e1zky<\/h2>\n\n\n\n<p>Najdete spolehliv\u00e9ho v\u00fdrobce je\u0159\u00e1b\u016f, ten navrhne syst\u00e9m n\u00e1t\u011br\u016f a \u010d\u00edslo syst\u00e9mu je spr\u00e1vn\u00e9 \u2013 ale jak po dokon\u010den\u00ed stavby ov\u011b\u0159\u00edte, \u017ee syst\u00e9m byl dodr\u017een? Pouh\u00e9 prohl\u00ed\u017een\u00ed barvy a lesku povrchu je zbyte\u010dn\u00e9. Postupujte podle t\u011bchto p\u011bti krok\u016f. U prvn\u00edch \u010dty\u0159 po\u017eadujte, aby v\u00fdrobce poskytl vlastn\u00ed z\u00e1znamy o kontrole. U p\u00e1t\u00e9ho kroku si m\u016f\u017eete najmout t\u0159et\u00ed stranu.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"step-1-surface-preparation-inspection\">Krok 1: Kontrola p\u0159\u00edpravy povrchu<\/h3>\n\n\n\n<p>P\u0159ed lakov\u00e1n\u00edm se postavte vedle konstruk\u010dn\u00edho prvku. Porovnejte povrch s fotografiemi podle normy ISO 8501-1 (vyti\u0161t\u011bn\u00e1 kopie nebo PDF v telefonu), abyste se ujistili, \u017ee spl\u0148uje standard Sa2.5. Kl\u00ed\u010dov\u00e9 kontroly: Jsou na povrchu zb\u00fdvaj\u00edc\u00ed okuj\u00ed (tmav\u00e9, \u0161upinat\u00e9 skvrny)? Je na n\u011bm kontaminov\u00e1n olejem (test kapkami vody \u2013 nast\u0159\u00edkejte vodu na povrch; pokud se kapky neroz\u0161\u00ed\u0159\u00ed, znamen\u00e1 to, \u017ee je na n\u011bm p\u0159\u00edtomen olej)?<\/p>\n\n\n\n<p>Zm\u011b\u0159te drsnost pomoc\u00ed replika\u010dn\u00ed p\u00e1sky Testex nebo drsnom\u011bru a ov\u011b\u0159te, \u017ee je v rozmez\u00ed Rz 40-70 \u03bcm. Pou\u017eit\u00ed metody s p\u00e1skou je velmi levn\u00e9, zhruba tucet USD za roli.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"step-2-climatic-condition-check\">Krok 2: Kontrola klimatick\u00fdch podm\u00ednek<\/h3>\n\n\n\n<p>P\u0159ed lakov\u00e1n\u00edm zm\u011b\u0159te teplotu ocelov\u00e9ho povrchu, teplotu vzduchu, relativn\u00ed vlhkost a rosn\u00fd bod. Teplota ocelov\u00e9ho povrchu mus\u00ed b\u00fdt alespo\u0148 o 3 \u00b0C nad rosn\u00fdm bodem \u2013 jinak se na oceli bude tvo\u0159it kondenzace a nan\u00e1\u0161en\u00ed z\u00e1kladn\u00edho n\u00e1t\u011bru na vodn\u00ed film je zbyte\u010dn\u00e9. Relativn\u00ed vlhkost nad 85% nen\u00ed pro aplikaci povolena (vytvrzov\u00e1n\u00ed epoxidu je siln\u011b ovlivn\u011bno vlhkost\u00ed).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"step-3-dry-film-thickness-dft\">Krok 3: Tlou\u0161\u0165ka such\u00e9ho filmu (DFT)<\/h3>\n\n\n\n<p>Podle normy SSPC-PA2: prove\u010fte 5 m\u011b\u0159en\u00ed na ka\u017ed\u00fdch 10 m\u00b2, zm\u011b\u0159te 3kr\u00e1t v ka\u017ed\u00e9m bod\u011b a vypo\u010d\u00edtejte pr\u016fm\u011br. Pravidla pro p\u0159ijet\u00ed:<\/p>\n\n\n\n<ul>\n<li>\u017d\u00e1dn\u00e1 jednotliv\u00e1 nam\u011b\u0159en\u00e1 hodnota nesm\u00ed b\u00fdt men\u0161\u00ed ne\u017e 80% specifikovan\u00e9 hodnoty.<\/li>\n\n\n\n<li>Pr\u016fm\u011br v\u0161ech bod\u016f nesm\u00ed b\u00fdt men\u0161\u00ed ne\u017e stanoven\u00e1 hodnota.<\/li>\n<\/ul>\n\n\n\n<p>Nap\u0159\u00edklad pokud po\u017eadujete celkovou DFT 200 \u03bcm pro syst\u00e9m A4.14, \u017e\u00e1dn\u00fd jednotliv\u00fd bod m\u011b\u0159en\u00ed nesm\u00ed b\u00fdt men\u0161\u00ed ne\u017e 160 \u03bcm a pr\u016fm\u011br v\u0161ech bod\u016f mus\u00ed b\u00fdt \u2265 200 \u03bcm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"step-4-electric-spark-holiday-detection\">Krok 4: Detekce elektrick\u00e9 jiskry (dovolen\u00e1)<\/h3>\n\n\n\n<p>Po vytvrzen\u00ed n\u00e1t\u011bru (obvykle 24\u201348 hodin po aplikaci) prohledejte cel\u00fd povrch detektorem sv\u00e1tk\u016f. Vypo\u010d\u00edtejte detek\u010dn\u00ed nap\u011bt\u00ed pomoc\u00ed vzorce: <strong>5 V\/\u03bcm \u00d7 Celkov\u00e1 DFT (\u03bcm)<\/strong>.<\/p>\n\n\n\n<p>Pokud je va\u0161e celkov\u00e1 DFT 200 \u03bcm, detek\u010dn\u00ed nap\u011bt\u00ed = 5 \u00d7 200 = 1000 V. Kdy\u017e sonda p\u0159ej\u00ed\u017ed\u00ed po povlaku, jak\u00e9koli mal\u00e9 body (pr\u00e1zdn\u00e9 m\u00edsto) vytvo\u0159\u00ed jiskru \u2013 m\u00edsto jiskry je hol\u00fd ocelov\u00fd bod, kde ur\u010dit\u011b za\u010dne koroze. Pr\u00e1zdn\u00e9 m\u00edsto se obvykle nach\u00e1z\u00ed v ko\u0159enech svar\u016f, roz\u00edch hran a oblastech s nadm\u011brn\u011b vysokou drsnost\u00ed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"step-5-adhesion-test\">Krok 5: Zkou\u0161ka adheze<\/h3>\n\n\n\n<p>Pro DFT \u2264250 \u03bcm pou\u017eijte <strong>zkou\u0161ka k\u0159\u00ed\u017eov\u00fdm \u0159ezem (ISO 2409)<\/strong> : no\u017eem nar\u00fdhujte m\u0159\u00ed\u017eku 6\u00d76, p\u0159ilepte p\u00e1sku, st\u00e1hn\u011bte ji a spo\u010d\u00edtejte, kolik \u010dtverc\u016f se odlepilo. Pro DFT &gt;250 \u03bcm pou\u017eijte <strong>zkou\u0161ka odtr\u017een\u00edm (ISO 4624)<\/strong> : p\u0159ilepte kovovou panenku k povlaku speci\u00e1ln\u00edm epoxidem, vytvrdn\u011bte ji a zm\u011b\u0159te tahovou s\u00edlu pot\u0159ebnou k jej\u00edmu odtr\u017een\u00ed. Po\u017eadavek je <strong>\u22655 MPa<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"common-coating-defects-judge-at-a-glance\">B\u011b\u017en\u00e9 vady povrchov\u00e9 \u00fapravy \u2013 posu\u010fte na prvn\u00ed pohled<\/h2>\n\n\n\n<p>Vady n\u00e1t\u011bru nejsou \u201esm\u016fla\u201c. V\u017edy existuj\u00ed pouze dv\u011b z\u00e1kladn\u00ed p\u0159\u00ed\u010diny: nedostate\u010dn\u00e1 p\u0159\u00edprava povrchu nebo nespr\u00e1vn\u00e9 vytvrzen\u00ed n\u00e1t\u011bru.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>P\u0159eb\u011bhnout<\/th><th>Popis<\/th><th>Hlavn\u00ed p\u0159\u00ed\u010dina<\/th><th>Kdy\u017e se to objev\u00ed<\/th><\/tr><\/thead><tbody><tr><td><strong>Puch\u00fd\u0159e<\/strong><\/td><td>Mal\u00e9 hrboly na povrchu n\u00e1t\u011bru o pr\u016fm\u011bru 1\u20135 mm; jejich roz\u0159\u00edznut\u00edm se odhal\u00ed voda nebo vzduch<\/td><td>Rozpustn\u00e9 soli zanechan\u00e9 na povrchu oceli (nej\u010dast\u011bji u mo\u0159sk\u00e9ho p\u00edsku pou\u017e\u00edvan\u00e9ho k trysk\u00e1n\u00ed bez \u0159\u00e1dn\u00e9ho promyt\u00ed); osmotick\u00fd tlak vtahuje vodu do povlaku<\/td><td>Nej\u010dast\u011bji po n\u00e1mo\u0159n\u00ed p\u0159eprav\u011b; objevuje se v d\u00e1vk\u00e1ch 3\u20136 m\u011bs\u00edc\u016f pozd\u011bji<\/td><\/tr><tr><td><strong>D\u00edrkov\u00e1 d\u00edrka<\/strong><\/td><td>Drobn\u00e9 viditeln\u00e9 otvory na povrchu povlaku o pr\u016fm\u011bru 0,1\u20130,5 mm; pod sv\u011btlem vypadaj\u00ed jako jemn\u00e9 b\u00edl\u00e9 te\u010dky<\/td><td>Vzduchov\u00e9 bubliny vznikl\u00e9 b\u011bhem m\u00edch\u00e1n\u00ed barvy nebyly p\u0159ed aplikac\u00ed odstran\u011bny, nebo byla st\u0159\u00edkac\u00ed pistole p\u0159\u00edli\u0161 daleko, co\u017e zp\u016fsobilo, \u017ee barva za\u010dala vytvrzovat ve vzduchu.<\/td><td>Lze nal\u00e9zt na m\u00edst\u011b aplikace; snadno detekovateln\u00fd detektorem dovolen\u00e9<\/td><\/tr><tr><td><strong>Pomeran\u010dov\u00e1 k\u016fra<\/strong><\/td><td>Zvr\u00e1sn\u011bn\u00fd povrch barvy, vypad\u00e1 jako pomeran\u010dov\u00e1 k\u016fra<\/td><td>St\u0159\u00edkac\u00ed pistole p\u0159\u00edli\u0161 daleko, viskozita barvy p\u0159\u00edli\u0161 vysok\u00e1 nebo p\u0159idan\u00e9 nedostate\u010dn\u00e9 mno\u017estv\u00ed \u0159edidla. Rozpou\u0161t\u011bdlo se odpa\u0159ovalo p\u0159\u00edli\u0161 rychle; barva nem\u011bla \u010das se p\u0159ed zaschnut\u00edm srovnat.<\/td><td>Okam\u017eit\u011b viditeln\u00e9 v m\u00edst\u011b aplikace<\/td><\/tr><tr><td><strong>Prask\u00e1n\u00ed<\/strong><\/td><td>Nepravideln\u00e9 trhliny na povrchu n\u00e1t\u011bru; hlubok\u00e9 trhliny mohou dos\u00e1hnout a\u017e k mezivrstv\u011b<\/td><td>Neslu\u010ditelnost mezi vrchn\u00edm n\u00e1t\u011brem a mezivrstvou (nap\u0159. nan\u00e1\u0161en\u00ed rychleschnouc\u00edho alkydov\u00e9ho vrchn\u00edho n\u00e1t\u011bru na epoxidov\u00fd MIO) nebo p\u0159\u00edli\u0161 siln\u00e1 vrstva barvy nanesen\u00e1 v jednom kroku<\/td><td>T\u00fddny a\u017e m\u011bs\u00edce po aplikaci<\/td><\/tr><tr><td><strong>Delaminace<\/strong><\/td><td>Cel\u00e1 vrstva n\u00e1t\u011bru se odlupuje; bod odd\u011blen\u00ed je mezi z\u00e1kladn\u00edm n\u00e1t\u011brem a ocelov\u00fdm plechem<\/td><td>Nekvalifikovan\u00e1 p\u0159\u00edprava povrchu \u2013 nedostate\u010dn\u00e9 odma\u0161t\u011bn\u00ed nebo trysk\u00e1n\u00ed nedos\u00e1hlo stupn\u011b Sa2,5<\/td><td>Kdykoli, zejm\u00e9na po struktur\u00e1ln\u00ed deformaci pod zat\u00ed\u017een\u00edm<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Praktick\u00e1 rada:<\/strong> Puch\u00fd\u0159e a delaminace se s nejv\u011bt\u0161\u00ed pravd\u011bpodobnost\u00ed objev\u00ed po doru\u010den\u00ed zbo\u017e\u00ed do c\u00edlov\u00e9ho p\u0159\u00edstavu, nikoli v d\u00edln\u011b. Teplota, vlhkost a prost\u0159ed\u00ed se solnou mlhou uvnit\u0159 n\u00e1mo\u0159n\u00edho kontejneru funguj\u00ed jako komora pro urychlenou korozi. Proto vy\u017eadujeme jednu kontrolu 48 hodin po dokon\u010den\u00ed n\u00e1t\u011bru a druhou p\u0159ed balen\u00edm. Pokud n\u00e1t\u011br projde ob\u011bma kontrolami, je pravd\u011bpodobnost probl\u00e9m\u016f po doru\u010den\u00ed velmi n\u00edzk\u00e1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"what-we-have-done\">Co jsme ud\u011blali<\/h2>\n\n\n\n<p>Od standardn\u00edch vnit\u0159n\u00edch d\u00edlensk\u00fdch mostov\u00fdch je\u0159\u00e1b\u016f C3, p\u0159es 460\u03bcm siln\u00fd antikorozn\u00ed jednonosn\u00edkov\u00fd mostov\u00fd je\u0159\u00e1b C4 na sr\u00edlansk\u00e9m pob\u0159e\u017e\u00ed, a\u017e po speci\u00e1ln\u00ed n\u00e1t\u011br pro vypou\u0161t\u011bc\u00ed centrum satelit\u016f Jiuquan \u2013 v pr\u016fb\u011bhu let jsme implementovali n\u00e1t\u011brov\u00e9 syst\u00e9my pro \u0161irokou \u0161k\u00e1lu korozivn\u00edch prost\u0159ed\u00ed, kter\u00e9 pokr\u00fdvaj\u00ed v\u011bt\u0161inu podm\u00ednek, se kter\u00fdmi se pravd\u011bpodobn\u011b setk\u00e1te.<\/p>\n\n\n\n<p>Pokud aktu\u00e1ln\u011b kupujete je\u0159\u00e1b nebo m\u00e1te za\u0159\u00edzen\u00ed, u kter\u00e9ho je t\u0159eba prov\u00e9st rozs\u00e1hlou antikorozn\u00ed \u00fadr\u017ebu, m\u016f\u017eeme v\u00e1m poskytnout individu\u00e1ln\u00ed doporu\u010den\u00ed a cenovou nab\u00eddku ohledn\u011b v\u00fdb\u011bru n\u00e1t\u011bru pro va\u0161e specifick\u00e9 pracovn\u00ed podm\u00ednky. M\u016f\u017eete porovnat na\u0161i nab\u00eddku s nab\u00eddkou jin\u00e9ho v\u00fdrobce, kter\u00e9ho aktu\u00e1ln\u011b citujete \u2013 a pro ov\u011b\u0159en\u00ed m\u016f\u017eete pou\u017e\u00edt kontroln\u00ed seznam pro p\u0159ijet\u00ed v tomto \u010dl\u00e1nku.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">FAQ<\/h2>\n\n\n<div id=\"rank-math-faq\" class=\"rank-math-block\">\n<div class=\"rank-math-list\">\n<div id=\"faq-question-1781227688667\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question\"><strong>Jak\u00fd je v\u00fdchoz\u00ed n\u00e1t\u011br pro standardn\u00ed vnit\u0159n\u00ed mostov\u00fd je\u0159\u00e1b?<\/strong><\/h3>\n<div class=\"rank-math-answer\">\n\n<p>Prost\u0159ed\u00ed C3, syst\u00e9m A3.08 (epoxidov\u00fd zinkfosf\u00e1tov\u00fd z\u00e1kladn\u00ed n\u00e1t\u011br 80 \u03bcm + polyuretanov\u00fd vrchn\u00ed n\u00e1t\u011br 40 \u03bcm x 2 vrstvy), celkov\u00e1 DFT \u2265160 \u03bcm, ochrann\u00e1 doba 5\u201315 let.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1781227696856\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question\"><strong>M\u016f\u017eu prost\u011b pou\u017e\u00edt nejsiln\u011bj\u0161\u00ed syst\u00e9m bez ohledu na prost\u0159ed\u00ed?<\/strong><\/h3>\n<div class=\"rank-math-answer\">\n\n<p>Technicky provediteln\u00e9, ale ekonomicky nehospod\u00e1rn\u00e9. Pou\u017eit\u00ed syst\u00e9mu C5 v prost\u0159ed\u00ed C3 je jako pou\u017eit\u00ed kladiva k rozlousknut\u00ed o\u0159echu. Cena barvy se zdvojn\u00e1sob\u00ed, doba aplikace se prodlu\u017euje a emise v\u00fdfukov\u00fdch plyn\u016f se zvy\u0161uj\u00ed, ale ochrann\u00fd \u00fa\u010dinek je t\u00e9m\u011b\u0159 stejn\u00fd jako u syst\u00e9mu A3.11 (dlouhodob\u00fd syst\u00e9m C3). V\u00fdb\u011br podle prost\u0159ed\u00ed je spr\u00e1vn\u00fd p\u0159\u00edstup.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1781227706026\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question\"><strong>Co je lep\u0161\u00ed, \u017e\u00e1rov\u00e9 zinkov\u00e1n\u00ed nebo lakov\u00e1n\u00ed?<\/strong><\/h3>\n<div class=\"rank-math-answer\">\n\n<p>Ka\u017ed\u00fd z nich m\u00e1 sv\u00e9 vlastn\u00ed sc\u00e9n\u00e1\u0159e pou\u017eit\u00ed. \u017d\u00e1rov\u00e9 zinkov\u00e1n\u00ed m\u00e1 del\u0161\u00ed antikorozn\u00ed \u017eivotnost (20\u201325 let), nab\u00edz\u00ed kompletn\u00ed pokryt\u00ed (v\u010detn\u011b vnit\u0159ku potrub\u00ed a \u0161t\u011brbin), ale proces je slo\u017eit\u00fd, barva je omezena na \u0161edo-st\u0159\u00edbrnou a nelze jej opravit na m\u00edst\u011b. N\u00e1t\u011br nab\u00edz\u00ed v\u00fdb\u011br barev, lze jej opravit na m\u00edst\u011b a m\u00e1 ni\u017e\u0161\u00ed n\u00e1klady, ale vy\u017eaduje v\u011bt\u0161\u00ed \u00fadr\u017ebu ka\u017ed\u00fdch 7\u201315 let. U v\u011bt\u0161iny pr\u016fmyslov\u00fdch mostov\u00fdch je\u0159\u00e1b\u016f je posta\u010duj\u00edc\u00ed a flexibiln\u011bj\u0161\u00ed n\u00e1t\u011br.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1781227719733\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question\"><strong>Jak si mohu ov\u011b\u0159it, zda je n\u00e1t\u011brov\u00fd syst\u00e9m uv\u00e1d\u011bn\u00fd v\u00fdrobcem spolehliv\u00fd?<\/strong><\/h3>\n<div class=\"rank-math-answer\">\n\n<p>Po\u017e\u00e1dejte je o p\u011bt v\u011bc\u00ed: 1) Z\u00e1znamy o otrysk\u00e1n\u00ed + srovn\u00e1vac\u00ed fotografie dle normy Sa2.5; 2) Zna\u010dku, model a \u010d\u00edslo \u0161ar\u017ee pro ka\u017edou vrstvu barvy; 3) Z\u00e1znamy o m\u011b\u0159en\u00ed DFT (m\u011b\u0159eno dle normy SSPC-PA2); 4) Zpr\u00e1vu o zkou\u0161ce solnou mlhou (\u2265720 hodin bez \u010derven\u00e9 rzi u epoxidov\u00fdch syst\u00e9m\u016f); 5) Osv\u011bd\u010den\u00ed o kvalifikaci aplik\u00e1tora a denn\u00ed klimatick\u00e9 z\u00e1znamy b\u011bhem lakov\u00e1n\u00ed.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1781227734072\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question\"><strong>Na kolik let m\u016f\u017ee n\u00e1t\u011br zaru\u010dit, \u017ee nebude reziv\u011bt?<\/strong><\/h3>\n<div class=\"rank-math-answer\">\n\n<p>\u201eOchrann\u00e1 doba\u201c definovan\u00e1 normou ISO 12944 nen\u00ed \u201edoba do za\u010d\u00e1tku koroze\u201c, ale doba do <em>je nutn\u00e1 prvn\u00ed v\u011bt\u0161\u00ed oprava n\u00e1t\u011bru<\/em>V tomto bod\u011b se na n\u00e1t\u011bru mohou objevit lok\u00e1ln\u00ed rezav\u00e9 skvrny, ale samotn\u00e1 ocelov\u00e1 konstrukce je neporu\u0161en\u00e1. Kr\u00e1tkodob\u00e1 \u017eivotnost: &gt;5 let (zastaven\u00ed reziv\u011bn\u00ed). St\u0159edn\u00ed \u017eivotnost: 7\u201315 let. Dlouhodob\u00e1 \u017eivotnost: 15\u201325 let. Pozn\u00e1mka: \u201eDlouhodob\u00e1 \u017eivotnost\u201c neznamen\u00e1 \u201enav\u017edy\u201c. Pravideln\u00e9 kontroly a drobn\u00e9 opravy (op\u011btovn\u00e9 nanesen\u00ed vrchn\u00edho n\u00e1t\u011bru) jsou b\u011b\u017en\u00e9.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"Vid\u011bl jsem to u\u017e p\u0159\u00edli\u0161 mnohokr\u00e1t: mostov\u00fd je\u0159\u00e1b, kter\u00fd je v provozu m\u00e9n\u011b ne\u017e p\u011bt let, za\u010d\u00edn\u00e1 vykazovat rez pod\u00e9l svar\u016f hlavn\u00edho nosn\u00edku, puch\u00fd\u0159e povlaku na spodn\u00ed p\u0159\u00edrub\u011b koncov\u00e9ho voz\u00edku a velk\u00e9 odlupuj\u00edc\u00ed se lupiny barvy kolem otvor\u016f pro \u0161rouby. Kdy\u017e se objev\u00ed takov\u00e9 probl\u00e9my, z\u00e1kazn\u00edci se na n\u00e1s v\u017edy obracej\u00ed, abychom zjistili, co se d\u011blo [\u2026]","protected":false},"featured_media":11685,"parent":0,"menu_order":0,"template":"single-SEO-Table.php","posts_category":[189],"posts_tag":[781],"acf":[],"_links":{"self":[{"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/xmxposts\/11670"}],"collection":[{"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/xmxposts"}],"about":[{"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/types\/posts"}],"version-history":[{"count":8,"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/xmxposts\/11670\/revisions"}],"predecessor-version":[{"id":11734,"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/xmxposts\/11670\/revisions\/11734"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/media\/11685"}],"wp:attachment":[{"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/media?parent=11670"}],"wp:term":[{"taxonomy":"posts_category","embeddable":true,"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/posts_category?post=11670"},{"taxonomy":"posts_tag","embeddable":true,"href":"https:\/\/www.kscranegroup.com\/cs\/wp-json\/wp\/v2\/posts_tag?post=11670"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}