{"id":19110,"date":"2026-08-20T13:23:13","date_gmt":"2026-08-20T13:23:13","guid":{"rendered":"https:\/\/tuohaihardware.com\/?p=19110"},"modified":"2026-08-20T15:02:51","modified_gmt":"2026-08-20T15:02:51","slug":"koroze-v-nerezove-oceli","status":"publish","type":"post","link":"https:\/\/tuohaihardware.com\/cs\/corrosion-in-stainless-steel\/","title":{"rendered":"Koroze nerezov\u00e9 oceli: p\u0159\u00ed\u010diny, typy a prevence"},"content":{"rendered":"<p>Nerezov\u00e1 ocel je odoln\u00e1 v\u016f\u010di korozi, nikoli v\u0161ak korozivzdorn\u00e1. Pokud se jej\u00ed jakost, povrch, proveden\u00ed a pracovn\u00ed prost\u0159ed\u00ed li\u0161\u00ed, m\u016f\u017ee se na sou\u010d\u00e1sti objevit skvrny, d\u016flky, koroze kolem spoj\u016f nebo praskliny. Tato p\u0159\u00edru\u010dka v\u00e1m pom\u016f\u017ee identifikovat mechanismus, posoudit riziko a zabr\u00e1nit opakovan\u00e9mu selh\u00e1n\u00ed.<\/p>\n<blockquote><p><strong>Ke korozi nerezov\u00e9 oceli doch\u00e1z\u00ed, kdy\u017e se jej\u00ed pasivn\u00ed vrstva bohat\u00e1 na chrom rozpadne nebo se sama neoprav\u00ed. Chloridy, \u00fazk\u00e9 \u0161t\u011brbiny, vysok\u00e1 teplota, nevhodn\u00e9 chemik\u00e1lie, kontaminace povrchu, \u0161patn\u00e9 zpracov\u00e1n\u00ed a tahov\u00e9 nap\u011bt\u00ed \u2013 to v\u0161e m\u016f\u017ee vytv\u00e1\u0159et podm\u00ednky, za kter\u00fdch k tomu doch\u00e1z\u00ed.<\/strong><\/p><\/blockquote>\n<h2>Pro\u010d nerezov\u00e1 ocel odol\u00e1v\u00e1 korozi?<\/h2>\n<p>Nerezov\u00e1 ocel obsahuje dostatek chromu, aby na sv\u00e9m povrchu vytvo\u0159ila velmi tenk\u00fd a stabiln\u00ed oxidov\u00fd film. Tento pasivn\u00ed film odd\u011bluje podkladov\u00fd kov od vody a mnoha korozivn\u00edch l\u00e1tek. Pokud je \u010dist\u00fd povrch nerezov\u00e9 oceli lehce po\u0161kr\u00e1b\u00e1n, film se obvykle m\u016f\u017ee znovu vytvo\u0159it, pokud je k dispozici kysl\u00edk.<\/p>\n<p>Tato ochrana nen\u00ed silnou vrstvou. Z\u00e1le\u017e\u00ed na slo\u017een\u00ed slitiny, \u010dist\u00e9m povrchu a prost\u0159ed\u00ed, ve kter\u00e9m film z\u016fst\u00e1v\u00e1 stabiln\u00ed. Pokud film napadaj\u00ed chloridy, ne\u010distoty ho blokuj\u00ed nebo \u00fazk\u00e1 mezera omezuje p\u0159\u00edstup kysl\u00edku, m\u016f\u017ee se mal\u00e1 nechr\u00e1n\u011bn\u00e1 oblast st\u00e1t aktivn\u00ed, zat\u00edmco okoln\u00ed povrch z\u016fst\u00e1v\u00e1 pasivn\u00ed. Koroze se pak m\u016f\u017ee koncentrovat v t\u00e9to mal\u00e9 oblasti a proniknout hloub\u011bji, ne\u017e by nazna\u010doval jej\u00ed povrchov\u00fd vzhled.<\/p>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"700\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/stainless-steel-passive-film-breakdown-diagram.jpg\" alt=\"Diagram zn\u00e1zor\u0148uj\u00edc\u00ed lokalizovan\u00e9 proru\u0161en\u00ed pasivn\u00ed vrstvy nad povrchem nerezov\u00e9 oceli\" class=\"wp-image-19118\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/stainless-steel-passive-film-breakdown-diagram.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/stainless-steel-passive-film-breakdown-diagram-768x448.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/stainless-steel-passive-film-breakdown-diagram-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<h2>Co zp\u016fsobuje korozi nerezov\u00e9 oceli?<\/h2>\n<p>V\u011bt\u0161ina probl\u00e9m\u016f s koroz\u00ed nerezov\u00e9 oceli pramen\u00ed z nesouladu mezi materi\u00e1lem a jeho skute\u010dn\u00fdmi provozn\u00edmi podm\u00ednkami. Riziko se obvykle zvy\u0161uje, kdy\u017e se sou\u010dasn\u011b vyskytne n\u011bkolik n\u00e1sleduj\u00edc\u00edch faktor\u016f.<\/p>\n<h3>Chloridy a usazeniny sol\u00ed<\/h3>\n<p>Chloridy se b\u011b\u017en\u011b vyskytuj\u00ed v mo\u0159sk\u00e9 vod\u011b, pob\u0159e\u017en\u00edm vzduchu, posypov\u00e9 soli, soln\u00e9m roztoku, n\u011bkter\u00fdch procesn\u00edch kapalin\u00e1ch, b\u011blidle, \u010distic\u00edch prost\u0159edc\u00edch s chlornanem a zbytc\u00edch obsahuj\u00edc\u00edch chloridy. Mohou lok\u00e1ln\u011b naru\u0161it pasivn\u00ed film a iniciovat d\u016flkovou korozi. Pokud se slan\u00e1 voda odpa\u0159\u00ed, chloridy zb\u00fdvaj\u00edc\u00ed na povrchu se mohou v\u00edce koncentrovat, tak\u017ee ob\u010dasn\u00e9 navlh\u010den\u00ed a n\u00e1sledn\u00e9 vyschnut\u00ed m\u016f\u017ee st\u00e1le zp\u016fsobit v\u00e1\u017en\u00fd lok\u00e1ln\u00ed probl\u00e9m.<\/p>\n<h3>\u00dazk\u00e9 mezery, usazeniny a stojat\u00e1 voda<\/h3>\n<p>Pod podlo\u017ekou, uvnit\u0159 z\u00e1vitu, mezi p\u0159ekr\u00fdvaj\u00edc\u00edmi se \u010d\u00e1stmi nebo pod ne\u010distotami m\u016f\u017ee b\u00fdt lok\u00e1ln\u00ed p\u0159\u00edsun kysl\u00edku ni\u017e\u0161\u00ed ne\u017e na otev\u0159en\u00e9m povrchu. Tento rozd\u00edl zt\u011b\u017euje udr\u017een\u00ed stability pasivn\u00ed vrstvy uvnit\u0159 mezery. S\u016fl a vlhkost zachycen\u00e9 ve stejn\u00e9 oblasti probl\u00e9m je\u0161t\u011b zhor\u0161uj\u00ed.<\/p>\n<p>U \u0159et\u011bz\u016f a p\u0159ipojen\u00e9ho kov\u00e1n\u00ed si zvl\u00e1\u0161tn\u00ed pozornost zaslou\u017e\u00ed kontaktn\u00ed body mezi \u010dl\u00e1nky, h\u00e1ky, t\u0159meny a spojovac\u00edmi \u010d\u00e1stmi. Tato m\u00edsta mohou zadr\u017eovat vodu a usazeniny, i kdy\u017e se viditeln\u00e9 vn\u011bj\u0161\u00ed povrchy zdaj\u00ed b\u00fdt \u010dist\u00e9.<\/p>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"700\" class=\"wp-image-19107\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/chain-link-contact-points-and-moisture-traps.jpg\" alt=\"Detail kontaktn\u00edch m\u00edst \u0159et\u011bzov\u00fdch \u010dl\u00e1nk\u016f, kde se m\u016f\u017ee hromadit vlhkost a usazeniny\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/chain-link-contact-points-and-moisture-traps.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/chain-link-contact-points-and-moisture-traps-768x448.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/chain-link-contact-points-and-moisture-traps-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<h3>\u0160patn\u00e1 zn\u00e1mka pro \u017eivotn\u00ed prost\u0159ed\u00ed<\/h3>\n<p>Nerezov\u00e1 ocel je skupina slitin, nikoli jeden materi\u00e1l. Ka\u017ed\u00e1 jakost m\u00e1 jinou reakci na chloridy, kyseliny, teplo, opot\u0159eben\u00ed a zpracov\u00e1n\u00ed. Jakostn\u00ed oceli s obsahem molybdenu, jako je 316, jsou obecn\u011b odoln\u011bj\u0161\u00ed v\u016f\u010di chloridov\u00e9 d\u016flkov\u00e9 korozi ne\u017e b\u011b\u017en\u00e1 304, ale to neznamen\u00e1, \u017ee 316 je vhodn\u00e1 pro v\u0161echny pob\u0159e\u017en\u00ed, n\u00e1mo\u0159n\u00ed, chemick\u00e9 nebo vysokoteplotn\u00ed aplikace.<\/p>\n<p>Samotn\u00fd n\u00e1zev t\u0159\u00eddy tedy nep\u0159edstavuje \u00faplnou specifikaci koroze. Pot\u0159ebujete tak\u00e9 zn\u00e1t skute\u010dn\u00e9 m\u00e9dium, koncentraci, pH, teplotu, vzorec expozice, zp\u016fsob \u010di\u0161t\u011bn\u00ed a o\u010dek\u00e1vanou \u017eivotnost. Pokud porovn\u00e1v\u00e1te nerezovou ocel s variantou s povlakovanou uhl\u00edkovou ocel\u00ed, <a href=\"https:\/\/tuohaihardware.com\/cs\/klicove-rozdily-mezi-pozinkovanou-a-nerezovou-oceli-a-jak-si-vybrat\/\">v\u00fdrobky z pozinkovan\u00e9 a nerezov\u00e9 oceli<\/a> chr\u00e1n\u00ed p\u0159ed koroz\u00ed r\u016fzn\u00fdmi zp\u016fsoby a nem\u011bly by b\u00fdt pova\u017eov\u00e1ny za zam\u011bniteln\u00e9.<\/p>\n<h3>Kontaminace \u017eelezem b\u011bhem v\u00fdroby nebo manipulace<\/h3>\n<p>Prach z uhl\u00edkov\u00e9 oceli, brusn\u00e9 \u010d\u00e1stice, dr\u00e1t\u011bn\u00e9 kart\u00e1\u010de, pracovn\u00ed stoly a n\u00e1stroje mohou p\u0159en\u00e1\u0161et voln\u00e9 \u017eelezo na nerezovou ocel. Toto \u017eelezo m\u016f\u017ee za p\u0159\u00edtomnosti vlhkosti rychle rezav\u011bt a zanech\u00e1vat oran\u017eovohn\u011bd\u00e9 skvrny na povrchu, kter\u00fd vypad\u00e1 jako koroze z nerezov\u00e9 oceli. Vnikl\u00e9 \u010d\u00e1stice mohou tak\u00e9 naru\u0161it pasivn\u00ed povrch a p\u0159isp\u00edvat k lok\u00e1ln\u00edmu napaden\u00ed.<\/p>\n<p>Proto by se n\u00e1stroje pro v\u00fdrobu a kone\u010dnou \u00fapravu nerezov\u00e9 oceli m\u011bly uchov\u00e1vat odd\u011blen\u011b od n\u00e1stroj\u016f pou\u017e\u00edvan\u00fdch na uhl\u00edkovou ocel. \u010ci\u0161t\u011bn\u00ed nerezov\u00e9ho d\u00edlu b\u011b\u017enou ocelovou vlnou m\u016f\u017ee zp\u016fsobit pr\u00e1v\u011b ten probl\u00e9m s rz\u00ed, kter\u00fd se sna\u017e\u00edte odstranit.<\/p>\n<h3>Sva\u0159ov\u00e1n\u00ed, tepeln\u00e9 t\u00f3nov\u00e1n\u00ed a ne\u00fapln\u00e9 \u010di\u0161t\u011bn\u00ed po v\u00fdrob\u011b<\/h3>\n<p>Sva\u0159ov\u00e1n\u00ed m\u016f\u017ee zanechat vedle svaru tepeln\u00fd odst\u00edn a oxidov\u00e9 okujnice. Siln\u00fd tepeln\u00fd odst\u00edn m\u016f\u017ee b\u00fdt spojen s povrchovou vrstvou ochuzenou o chrom, co\u017e sni\u017euje lok\u00e1ln\u00ed odolnost proti korozi, dokud nen\u00ed oxid a posti\u017een\u00fd povrch \u0159\u00e1dn\u011b o\u0161et\u0159en. Rozst\u0159iky ze svaru, hrub\u00e9 brou\u0161en\u00ed a zbytky mohou tak\u00e9 vytv\u00e1\u0159et m\u00edsta, kde se hromad\u00ed vlhkost a chloridy.<\/p>\n<p>Pokud je d\u016fle\u017eit\u00e1 odolnost proti korozi, je t\u0159eba p\u0159ed v\u00fdrobou dohodnout po\u017eadovanou \u00fapravu svaru, odstran\u011bn\u00ed oxid\u016f, \u010di\u0161t\u011bn\u00ed a pasivaci. Svar, kter\u00fd je struktur\u00e1ln\u011b p\u0159ijateln\u00fd, nen\u00ed automaticky p\u0159ipraven pro korozivn\u00ed prost\u0159ed\u00ed.<\/p>\n<h3>Nap\u011bt\u00ed, teplota a agresivn\u00ed chemik\u00e1lie<\/h3>\n<p>Vy\u0161\u0161\u00ed teplota m\u016f\u017ee urychlit chemick\u00e9 reakce a zv\u00fd\u0161it pravd\u011bpodobnost n\u011bkter\u00fdch lokalizovan\u00fdch korozn\u00edch mechanism\u016f. Ur\u010dit\u00e9 kombinace tahov\u00e9ho nap\u011bt\u00ed, teploty a korozivn\u00edch l\u00e1tek mohou tak\u00e9 zp\u016fsobit korozn\u00ed prask\u00e1n\u00ed v d\u016fsledku nap\u011bt\u00ed. Siln\u00e9 kyseliny a nevhodn\u00e9 \u010distic\u00ed chemik\u00e1lie mohou pasivn\u00ed film napadat na \u0161ir\u0161\u00ed plo\u0161e.<\/p>\n<p>B\u011blidlo, \u010distic\u00ed prost\u0159edky s chlornanem, zbytky chlorid\u016f a \u010distic\u00ed prost\u0159edky na b\u00e1zi kyseliny chlorovod\u00edkov\u00e9 mohou po\u0161kodit nerezovou ocel. \u010cisti\u010d, kter\u00fd p\u016fsob\u00ed na jin\u00fd stavebn\u00ed materi\u00e1l, proto nemus\u00ed b\u00fdt vhodn\u00fd pro bl\u00edzk\u00e9 nerezov\u00e9 kov\u00e1n\u00ed.<\/p>\n<h2>Jak\u00e9 jsou hlavn\u00ed typy koroze nerezov\u00e9 oceli?<\/h2>\n<p>Identifikace mechanismu je d\u016fle\u017eit\u00e1, proto\u017ee ka\u017ed\u00fd typ vy\u017eaduje jin\u00e9 n\u00e1pravn\u00e9 opat\u0159en\u00ed. Odstran\u011bn\u00ed skvrny nevy\u0159e\u0161\u00ed probl\u00e9m s konstrukc\u00ed \u0161t\u011brbin a zm\u011bna jakosti neodstran\u00ed kontaminaci \u017eelezem ze sd\u00edlen\u00e9ho procesu mlet\u00ed.<\/p>\n<h3>Bodov\u00e1 koroze<\/h3>\n<p>Koroze je lok\u00e1ln\u00ed po\u0161kozen\u00ed, kter\u00e9 vytv\u00e1\u0159\u00ed mal\u00e9 dutiny na jinak neporu\u0161en\u00e9m povrchu. \u010castou p\u0159\u00ed\u010dinou jsou chloridy. Otvor m\u016f\u017ee vypadat nepatrn\u011b, zat\u00edmco d\u016flek pod n\u00edm je hlub\u0161\u00ed, tak\u017ee pouh\u00fd vizu\u00e1ln\u00ed vzhled m\u016f\u017ee po\u0161kozen\u00ed podcenit.<\/p>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"700\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/pitting-corrosion-cross-section-diagram.jpg\" alt=\"Pr\u016f\u0159ezov\u00fd diagram zn\u00e1zor\u0148uj\u00edc\u00ed mal\u00fd otvor v j\u00e1m\u011b a hlub\u0161\u00ed dutinu pod kovov\u00fdm povrchem\" class=\"wp-image-19119\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/pitting-corrosion-cross-section-diagram.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/pitting-corrosion-cross-section-diagram-768x448.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/pitting-corrosion-cross-section-diagram-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<p>U ozdobn\u00e9ho kov\u00e1n\u00ed se m\u011blk\u00e9 d\u016flky mohou nejprve jevit jako st\u00ed\u017enost na kvalitu nebo vzhled. U nosn\u00fdch d\u00edl\u016f, pru\u017ein, \u0159et\u011bz\u016f nebo tenk\u00fdch profil\u016f m\u016f\u017ee d\u016flek tak\u00e9 zmen\u0161it lok\u00e1ln\u00ed pr\u016f\u0159ez a p\u016fsobit jako zvy\u0161ova\u010d pnut\u00ed. Jeho bezpe\u010dnostn\u00ed v\u00fdznam mus\u00ed b\u00fdt posuzov\u00e1n sp\u00ed\u0161e podle funkce v\u00fdrobku, ne\u017e pouze podle barvy.<\/p>\n<h3>\u0160t\u011brbinov\u00e1 koroze<\/h3>\n<p>Ke \u0161t\u011brbinov\u00e9 korozi doch\u00e1z\u00ed v chr\u00e1n\u011bn\u00fdch oblastech, kde se m\u00edstn\u00ed chemie st\u00e1v\u00e1 agresivn\u011bj\u0161\u00ed a p\u0159\u00edstup kysl\u00edku je omezen\u00fd. Mezi b\u011b\u017en\u00e1 m\u00edsta pat\u0159\u00ed z\u00e1vity, p\u0159epl\u00e1tovan\u00e9 spoje, t\u011bsnic\u00ed plochy, usazeniny a \u00fazk\u00fd prostor pod hlavou spojovac\u00edho prvku.<\/p>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"700\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/crevice-corrosion-under-washer-diagram.jpg\" alt=\"Sch\u00e9ma zn\u00e1zor\u0148uj\u00edc\u00ed st\u00edn\u011bnou mezeru pod podlo\u017ekou, kde se m\u016f\u017ee hromadit vlhkost a p\u0159\u00edstup kysl\u00edku je omezen\u00fd\" class=\"wp-image-19120\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/crevice-corrosion-under-washer-diagram.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/crevice-corrosion-under-washer-diagram-768x448.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/crevice-corrosion-under-washer-diagram-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<p>Nejlep\u0161\u00ed prevence za\u010d\u00edn\u00e1 u n\u00e1vrhu. Odvodn\u011bn\u00ed, hladk\u00e9 povrchy, \u010distiteln\u00e9 sp\u00e1ry, ut\u011bsn\u011bn\u00e9 mezery v p\u0159\u00edpad\u011b pot\u0159eby a men\u0161\u00ed po\u010det lapa\u010d\u016f ne\u010distot jsou \u010dasto \u00fa\u010dinn\u011bj\u0161\u00ed ne\u017e spol\u00e9h\u00e1n\u00ed se na \u00fadr\u017ebu po zah\u00e1jen\u00ed koroze.<\/p>\n<h3>Galvanick\u00e1 koroze<\/h3>\n<p>Ke galvanick\u00e9 korozi m\u016f\u017ee doch\u00e1zet, kdy\u017e jsou odli\u0161n\u00e9 kovy elektricky propojeny v p\u0159\u00edtomnosti elektrolytu, jako je voda. M\u00e9n\u011b u\u0161lechtil\u00fd kov obecn\u011b koroduje rychleji. Nerezov\u00e1 ocel m\u016f\u017ee z\u016fstat vizu\u00e1ln\u011b bezchybn\u00e1, zat\u00edmco spojen\u00e1 pozinkovan\u00e1 nebo hlin\u00edkov\u00e1 sou\u010d\u00e1stka se zhor\u0161uje.<\/p>\n<p>V\u00fdsledek z\u00e1vis\u00ed na kovov\u00e9m p\u00e1ru, pom\u011bru povrch\u016f, elektrick\u00e9m kontaktu a prost\u0159ed\u00ed. Riziko m\u016f\u017eete sn\u00ed\u017eit v\u00fdb\u011brem kompatibiln\u00edch materi\u00e1l\u016f, elektrickou izolac\u00ed kov\u016f, vylou\u010den\u00edm vlhkosti nebo pou\u017eit\u00edm spr\u00e1vn\u011b navr\u017een\u00e9ho ochrann\u00e9ho syst\u00e9mu.<\/p>\n<h3>Prask\u00e1n\u00ed v d\u016fsledku koroze v d\u016fsledku nap\u011bt\u00ed<\/h3>\n<p>Korozn\u00ed prask\u00e1n\u00ed v d\u016fsledku nap\u011bt\u00ed vy\u017eaduje ur\u010ditou kombinaci n\u00e1chyln\u00e9ho materi\u00e1lu, tahov\u00e9ho nap\u011bt\u00ed a \u0161kodliv\u00e9ho prost\u0159ed\u00ed. Nap\u011bt\u00ed m\u016f\u017ee poch\u00e1zet z provozn\u00edho zat\u00ed\u017een\u00ed, tv\u00e1rn\u011bn\u00ed za studena, mont\u00e1\u017ee nebo zbytkov\u00e9ho sva\u0159ovac\u00edho nap\u011bt\u00ed. Prost\u0159ed\u00ed obsahuj\u00edc\u00ed chloridy p\u0159i zv\u00fd\u0161en\u00e9 teplot\u011b je u n\u011bkter\u00fdch nerezov\u00fdch ocel\u00ed dob\u0159e zn\u00e1m\u00fdm probl\u00e9mem.<\/p>\n<p>Praskliny m\u016f\u017ee b\u00fdt obt\u00ed\u017en\u00e9 odhalit d\u0159\u00edve, ne\u017e to ovlivn\u00ed v\u00fdkon. Pokud sou\u010d\u00e1st z nerezov\u00e9 oceli nese zat\u00ed\u017een\u00ed nebo slou\u017e\u00ed bezpe\u010dnostn\u00ed funkci, m\u011bly by viditeln\u00e9 praskliny v\u00e9st k technick\u00e9mu vyhodnocen\u00ed, nejen k \u010di\u0161t\u011bn\u00ed povrchu.<\/p>\n<h3>Mezikrystalov\u00e1 koroze<\/h3>\n<p>Mezikrystalov\u00e1 koroze napad\u00e1 oblasti v bl\u00edzkosti hranic zrn. M\u016f\u017ee b\u00fdt spojena se senzibilizac\u00ed, p\u0159i kter\u00e9 se chrom po vystaven\u00ed nep\u0159\u00edzniv\u00e9mu teplotn\u00edmu rozsahu slu\u010duje s uhl\u00edkem, co\u017e zp\u016fsobuje, \u017ee bl\u00edzk\u00e9 z\u00f3ny si m\u00e9n\u011b udr\u017euj\u00ed pasivn\u00ed ochranu.<\/p>\n<p>Modern\u00ed n\u00edzkouhl\u00edkov\u00e9 oceli a kontrolovan\u00e9 sva\u0159ovac\u00ed postupy toto riziko sni\u017euj\u00ed, ale jakost materi\u00e1lu a historie v\u00fdroby mus\u00ed st\u00e1le odpov\u00eddat aplikaci. Pokud se ob\u00e1v\u00e1te rozpadu svaru, specifikujte p\u0159\u00edslu\u0161n\u00e9 po\u017eadavky na materi\u00e1l, sva\u0159ov\u00e1n\u00ed, tepeln\u00e9 zpracov\u00e1n\u00ed a ov\u011b\u0159ov\u00e1n\u00ed, m\u00edsto abyste se spol\u00e9hali na obecn\u00fd po\u017eadavek na \u201cnerezovou ocel\u201d.\u201d<\/p>\n<h3>Rovnom\u011brn\u00e1 koroze<\/h3>\n<p>Rovnom\u011brn\u00e1 koroze postihuje \u0161ir\u0161\u00ed povrchovou plochu. Pro nerezovou ocel v norm\u00e1ln\u00edm prost\u0159ed\u00ed s atmosf\u00e9rou nebo vodou je m\u00e9n\u011b typick\u00e1 ne\u017e pro uhl\u00edkovou ocel, ale m\u016f\u017ee se vyskytovat v kyselin\u00e1ch nebo jin\u00fdch chemik\u00e1li\u00edch, kter\u00e9 napadaj\u00ed pasivn\u00ed film na cel\u00e9m povrchu. Rozhoduj\u00edc\u00ed je \u010dasto koncentrace chemik\u00e1lie a teplota.<\/p>\n<p>Pro chemick\u00e9 prost\u0159ed\u00ed nesta\u010d\u00ed jednoduch\u00e9 pravidlo 304 versus 316. Pou\u017eijte data o korozi pro p\u0159esn\u00e9 chemick\u00e9 podm\u00ednky a v p\u0159\u00edpadech, kdy m\u00e1 selh\u00e1n\u00ed v\u00e1\u017en\u00e9 n\u00e1sledky, zapojte specialistu na materi\u00e1ly.<\/p>\n<h2>Je hn\u011bd\u00e1 skvrna ze samotn\u00e9 nerezov\u00e9 oceli?<\/h2>\n<p>Ne ka\u017ed\u00e1 oran\u017eov\u00e1 zna\u010dka dokazuje, \u017ee nerezov\u00fd substr\u00e1t koroduje. Rezav\u00e9 st\u00e9kaj\u00edc\u00ed kapaliny z bl\u00edzk\u00e9ho d\u00edlu z uhl\u00edkov\u00e9 oceli nebo voln\u00e9 \u017eelezo, kter\u00e9 z\u016fstalo b\u011bhem v\u00fdroby, mohou nerezovou ocel zne\u010distit. Na druhou stranu, hn\u011bd\u00fd kruh kolem mal\u00e9 dutiny m\u016f\u017ee nazna\u010dovat aktivn\u00ed d\u016flkovou korozi.<\/p>\n<p>N\u00e1sleduj\u00edc\u00ed pozorov\u00e1n\u00ed pou\u017eijte jako \u00favodn\u00ed screeningov\u00fd n\u00e1stroj, nikoli jako n\u00e1hradu za inspekci.<\/p>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"700\" class=\"wp-image-19108\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/visible-rust-does-not-identify-corrosion-cause.jpg\" alt=\"Viditeln\u00e1 rez na pr\u016fmyslov\u00e9m \u0159et\u011bzu, kter\u00e1 sama o sob\u011b neur\u010duje druh kovu ani mechanismus koroze\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/visible-rust-does-not-identify-corrosion-cause.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/visible-rust-does-not-identify-corrosion-cause-768x448.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/visible-rust-does-not-identify-corrosion-cause-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<table>\n<thead>\n<tr>\n<th>Co vid\u00ed\u0161<\/th>\n<th>Mo\u017en\u00e1 p\u0159\u00ed\u010dina<\/th>\n<th>Co je t\u0159eba zkontrolovat d\u00e1le<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Sv\u011btle oran\u017eov\u00fd zbytek, kter\u00fd lze odstranit bez vzniku kazu<\/td>\n<td>Vn\u011bj\u0161\u00ed kontaminace \u017eelezem nebo rezav\u00fd odtok<\/td>\n<td>Zkontrolujte bl\u00edzk\u00e9 uhl\u00edkov\u00e9 oceli, sd\u00edlen\u00e9 n\u00e1stroje, brusn\u00fd prach, skladov\u00e1n\u00ed a obaly.<\/td>\n<\/tr>\n<tr>\n<td>Mal\u00e9 tmav\u00e9 nebo hn\u011bd\u00e9 skvrny s viditeln\u00fdmi dutinami<\/td>\n<td>Bodov\u00e1 koroze<\/td>\n<td>Zkontrolujte vystaven\u00ed chlorid\u016fm, usazeniny, stupe\u0148, teplotu a hloubku j\u00e1my<\/td>\n<\/tr>\n<tr>\n<td>Napaden\u00ed pod podlo\u017ekami, z\u00e1vity, p\u0159ekryt\u00ed nebo ne\u010distoty<\/td>\n<td>\u0160t\u011brbinov\u00e1 koroze<\/td>\n<td>Zkontrolujte odvodn\u011bn\u00ed, zachycenou vlhkost, konstrukci sp\u00e1r, usazeniny a p\u0159\u00edstup k \u010di\u0161t\u011bn\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Rez koncentrovan\u00e1 vedle svaru<\/td>\n<td>Tepeln\u00fd odst\u00edn, okuje, kontaminace \u017eelezem nebo nevhodn\u00e1 povrchov\u00e1 \u00faprava svar\u016f<\/td>\n<td>Prohl\u00e9dn\u011bte si z\u00e1znamy o sva\u0159ov\u00e1n\u00ed, odstra\u0148ov\u00e1n\u00ed oxid\u016f, \u010di\u0161t\u011bn\u00ed povrch\u016f a pasivaci<\/td>\n<\/tr>\n<tr>\n<td>Po\u0161kozen\u00ed koncentrovan\u00e9 v m\u00edstech, kde se dot\u00fdkaj\u00ed r\u016fzn\u00e9 kovy<\/td>\n<td>Galvanick\u00e1 interakce nebo rezav\u00fd odtok z druh\u00e9ho kovu<\/td>\n<td>Identifikujte oba kovy, elektrick\u00fd kontakt, vlhkost a pom\u011br povrch\u016f<\/td>\n<\/tr>\n<tr>\n<td>Jemn\u00e9 rozv\u011btven\u00e9 trhliny, zejm\u00e9na v bl\u00edzkosti nam\u00e1han\u00fdch nebo hork\u00fdch oblast\u00ed<\/td>\n<td>Mo\u017en\u00e9 prask\u00e1n\u00ed z koroze v d\u016fsledku nap\u011bt\u00ed<\/td>\n<td>Vy\u0159a\u010fte d\u00edl z kritick\u00e9ho provozu a nechte si kvalifikovan\u011b posoudit<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Pokud je sou\u010d\u00e1st nosn\u00e1, je sou\u010d\u00e1st\u00ed zdvihac\u00edho syst\u00e9mu nebo je jinak bezpe\u010dnostn\u011b kritick\u00e1, nevracejte ji do provozu pouze na z\u00e1klad\u011b odstran\u011bn\u00ed skvrn. Hloubka prohlubn\u00ed, zb\u00fdvaj\u00edc\u00ed pr\u016f\u0159ez, praskliny a p\u0159\u00edslu\u0161n\u00e1 krit\u00e9ria pro vy\u0159azen\u00ed jsou d\u016fle\u017eit\u011bj\u0161\u00ed ne\u017e vzhled.<\/p>\n<h2>Jak m\u016f\u017eete zabr\u00e1nit korozi nerezov\u00e9 oceli?<\/h2>\n<p>Nejspolehliv\u011bj\u0161\u00ed preventivn\u00ed pl\u00e1n za\u010d\u00edn\u00e1 je\u0161t\u011b p\u0159ed zad\u00e1n\u00edm objedn\u00e1vky. Rozhodnut\u00ed propracujte v n\u00e1sleduj\u00edc\u00edm po\u0159ad\u00ed.<\/p>\n<h3>1. Definujte re\u00e1ln\u00e9 servisn\u00ed prost\u0159ed\u00ed<\/h3>\n<p>Uve\u010fte, zda bude v\u00fdrobek pou\u017e\u00edv\u00e1n v interi\u00e9ru, exteri\u00e9ru, v bl\u00edzkosti pob\u0159e\u017e\u00ed, pln\u011b pono\u0159en, vystaven rozmrazovac\u00edm sol\u00edm, omyt dezinfek\u010dn\u00edmi prost\u0159edky nebo pou\u017eit s procesn\u00ed chemik\u00e1li\u00ed. Uve\u010fte teplotu, pH, cykly mokro-sucho, \u010distic\u00ed chemik\u00e1lie a zda jsou pravd\u011bpodobn\u00e9 usazeniny nebo stojat\u00e1 voda.<\/p>\n<p>\u201cVenkovn\u00ed pou\u017eit\u00ed\u201d je pro spolehliv\u00fd v\u00fdb\u011br materi\u00e1lu p\u0159\u00edli\u0161 \u0161irok\u00fd pojem. Kryt\u00fd m\u011bstsk\u00fd v\u00fdstavn\u00ed \u0159et\u011bzec a trvale mokr\u00fd pob\u0159e\u017en\u00ed \u0159et\u011bzec nevytv\u00e1\u0159ej\u00ed stejnou spot\u0159ebu koroze.<\/p>\n<h3>2. Vyberte t\u0159\u00eddu pro dan\u00e9 prost\u0159ed\u00ed a funkci<\/h3>\n<p>Vyberte druh nerezov\u00e9 oceli po definov\u00e1n\u00ed prost\u0159ed\u00ed, nikoli p\u0159edt\u00edm. Vy\u0161\u0161\u00ed obsah leguj\u00edc\u00ed oceli m\u016f\u017ee zlep\u0161it odolnost v\u016f\u010di n\u011bkter\u00fdm form\u00e1m lok\u00e1ln\u00ed koroze, ale tak\u00e9 m\u011bn\u00ed n\u00e1klady, dostupnost, tv\u00e1\u0159itelnost a n\u011bkdy i mechanick\u00e9 vlastnosti.<\/p>\n<p>V p\u0159\u00edpad\u011b vysoce rizikov\u00e9ho nebo kritick\u00e9ho provozu se v\u00fdb\u011br op\u00edr\u00e1 o relevantn\u00ed \u00fadaje o korozi, normy nebo aplika\u010dn\u00ed testy. Nepou\u017e\u00edvejte PRE nebo PREN jako samostatnou z\u00e1ruku; jedn\u00e1 se o u\u017eite\u010dn\u00e9 srovn\u00e1n\u00ed slitin, nikoli o predikci \u017eivotnosti v provozu.<\/p>\n<h3>3. Odstra\u0148te vodn\u00ed lapa\u010de a nepot\u0159ebn\u00e9 \u0161t\u011brbiny<\/h3>\n<p>Navrhn\u011bte pro odvodn\u011bn\u00ed, \u010di\u0161t\u011bn\u00ed a p\u0159\u00edstup vzduchu. Pokud je to praktick\u00e9, vyhn\u011bte se neut\u011bsn\u011bn\u00fdm p\u0159epl\u00e1tovan\u00fdm spoj\u016fm a lapa\u010d\u016fm ne\u010distot. Pokud nelze \u0161t\u011brbinu odstranit, zva\u017ete, zda by m\u011bla b\u00fdt ut\u011bsn\u011bna, izolov\u00e1na, sva\u0159ena nebo vyrobena z odoln\u011bj\u0161\u00edho materi\u00e1lu.<\/p>\n<p>U \u0159et\u011bzov\u00fdch sestav zva\u017ete nejen materi\u00e1l \u0159et\u011bzu, ale tak\u00e9 h\u00e1ky, spojky, upev\u0148ovac\u00ed prvky a upev\u0148ovac\u00ed body. Jeden nevhodn\u00fd komponent m\u016f\u017ee zp\u016fsobit rezav\u00fd st\u00e9kaj\u00edc\u00ed materi\u00e1l, galvanick\u00e9 p\u016fsoben\u00ed nebo lok\u00e1ln\u00ed probl\u00e9m s \u00fadr\u017ebou.<\/p>\n<h3>4. Kontrola v\u00fdroby a stavu povrchu<\/h3>\n<p>B\u011bhem \u0159ez\u00e1n\u00ed, brou\u0161en\u00ed, kart\u00e1\u010dov\u00e1n\u00ed a skladov\u00e1n\u00ed uchov\u00e1vejte nerezovou ocel odd\u011blen\u011b od uhl\u00edkov\u00e9 oceli. Pou\u017e\u00edvejte ur\u010den\u00e9 nebo d\u016fkladn\u011b kontrolovan\u00e9 n\u00e1stroje. Odstra\u0148te oxidy sva\u0159ov\u00e1n\u00ed a tepeln\u00fd n\u00e1t\u011br, pokud to vy\u017eaduj\u00ed provozn\u00ed po\u017eadavky, a specifikujte po\u017eadovanou povrchovou \u00fapravu.<\/p>\n<p><a href=\"https:\/\/store.astm.org\/a0380_a0380m-25.html\">ASTM A380\/A380M<\/a> Zahrnuje postupy \u010di\u0161t\u011bn\u00ed, odstra\u0148ov\u00e1n\u00ed okuj\u00ed, mo\u0159en\u00ed a pasivace nerezov\u00fdch d\u00edl\u016f a syst\u00e9m\u016f. Po\u017eadavek na pasivaci by m\u011bl definovat zam\u00fd\u0161len\u00fd proces a metodu p\u0159ijet\u00ed; slovo \u201cpasivov\u00e1no\u201d samo o sob\u011b m\u016f\u017ee b\u00fdt pro n\u00e1kup p\u0159\u00edli\u0161 v\u00e1gn\u00ed.<\/p>\n<h3>5. Dohodn\u011bte se na po\u017eadavc\u00edch na inspekci a testov\u00e1n\u00ed<\/h3>\n<p>Va\u0161e specifikace by m\u011bla identifikovat vzorek, podm\u00ednky, metodu, expozici a krit\u00e9ria p\u0159ijet\u00ed. Obecn\u00fd po\u017eadavek na \u201codolnost v\u016f\u010di soln\u00e9 mlze\u201d nebo \u201cnerezav\u00ed\u201d ponech\u00e1v\u00e1 p\u0159\u00edli\u0161 mnoho prostoru pro r\u016fzn\u00e9 interpretace.<\/p>\n<p>Zkou\u0161ka solnou mlhou m\u016f\u017ee ov\u011b\u0159it dohodnut\u00e9 po\u017eadavky nebo monitorovat konzistenci, pokud materi\u00e1l, ochrann\u00fd syst\u00e9m, vzorek a zku\u0161ebn\u00ed podm\u00ednky z\u016fst\u00e1vaj\u00ed srovnateln\u00e9. Nem\u011bla by b\u00fdt pou\u017e\u00edv\u00e1na samostatn\u011b k hodnocen\u00ed r\u016fzn\u00fdch materi\u00e1l\u016f nebo syst\u00e9m\u016f ochrany proti korozi a nep\u0159edpov\u00edd\u00e1 skute\u010dnou \u017eivotnost ve venkovn\u00edm prost\u0159ed\u00ed. Hotov\u00fd \u0159et\u011bz m\u00e1 tak\u00e9 kontaktn\u00ed plochy a mo\u017en\u00e9 svarov\u00e9 z\u00f3ny, kter\u00e9 se chovaj\u00ed odli\u0161n\u011b od ploch\u00e9ho testovac\u00edho panelu.<\/p>\n<h3>6. Vy\u010dist\u011bte produkt bez jeho op\u011btovn\u00e9 kontaminace<\/h3>\n<p>Odstra\u0148te s\u016fl, ne\u010distoty a procesn\u00ed usazeniny d\u0159\u00edve, ne\u017e se nahromad\u00ed. Pou\u017e\u00edvejte \u010distic\u00ed metody, kter\u00e9 odpov\u00eddaj\u00ed povrchov\u00e9 \u00faprav\u011b a zne\u010di\u0161t\u011bn\u00ed. Opl\u00e1chn\u011bte zbytky a nechte vodu odt\u00e9ct nebo uschnout, pokud je to mo\u017en\u00e9.<\/p>\n<p>Nepou\u017e\u00edvejte b\u011b\u017enou vlnu z uhl\u00edkov\u00e9 oceli, kart\u00e1\u010de z uhl\u00edkov\u00e9 oceli ani n\u00e1stroje ji\u017e kontaminovan\u00e9 uhl\u00edkovou ocel\u00ed. V p\u0159\u00edpad\u011b zna\u010dn\u00e9 rzi, za\u017eloutl\u00e9ho \u017eeleza, okuj\u00ed ze svar\u016f nebo podez\u0159en\u00ed na d\u016flkovou korozi vyu\u017eijte slu\u017eeb kvalifikovan\u00e9ho specialisty na povrchovou \u00fapravu nebo korozi nerezov\u00e9 oceli. Siln\u00e9 kyseliny a mo\u0159ic\u00ed prost\u0159edky vy\u017eaduj\u00ed kontrolovan\u00e9 bezpe\u010dnostn\u00ed, environment\u00e1ln\u00ed a povrchov\u00e9 postupy.<\/p>\n<h2>Co by si m\u011bli kupuj\u00edc\u00ed u nerezov\u00fdch \u0159et\u011bz\u016f a kov\u00e1n\u00ed specifikovat?<\/h2>\n<p>U objedn\u00e1vek \u0159et\u011bz\u016f a kov\u00e1n\u00ed je \u201cnerezov\u00e1 ocel\u201d pouze v\u00fdchoz\u00edm bodem. Ve specifikaci n\u00e1kupu by m\u011bla b\u00fdt tak\u00e9 uvedena:<\/p>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"700\" class=\"wp-image-19109\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/chain-hooks-connectors-material-compatibility.jpg\" alt=\"Kovov\u00e9 h\u00e1ky a spojky pro \u0159et\u011bzy ilustruj\u00edc\u00ed pot\u0159ebu specifikace materi\u00e1l\u016f propojovac\u00edch sou\u010d\u00e1st\u00ed\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/chain-hooks-connectors-material-compatibility.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/chain-hooks-connectors-material-compatibility-768x448.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/08\/chain-hooks-connectors-material-compatibility-18x12.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n<ul>\n<li>druh nerezov\u00e9 oceli nebo p\u0159\u00edslu\u0161n\u00e1 materi\u00e1lov\u00e1 norma;<\/li>\n<li>provozn\u00ed prost\u0159ed\u00ed a chemik\u00e1lie;<\/li>\n<li>po\u017eadovan\u00e9 rozm\u011bry a mechanick\u00e9 vlastnosti;<\/li>\n<li>po\u017eadavky na svary a povrchovou \u00fapravu;<\/li>\n<li>zda je nutn\u00e9 \u010di\u0161t\u011bn\u00ed, mo\u0159en\u00ed nebo pasivace;<\/li>\n<li>spojovac\u00ed materi\u00e1ly v h\u00e1\u010dc\u00edch, \u010dl\u00e1nc\u00edch, spojovac\u00edm prvc\u00edch a kov\u00e1n\u00ed;<\/li>\n<li>metody inspekce a korozn\u00edch zkou\u0161ek;<\/li>\n<li>krit\u00e9ria p\u0159ijet\u00ed pro skvrny, d\u016flky, praskliny a stav povrchu;<\/li>\n<li>kontroly balen\u00ed a skladov\u00e1n\u00ed, kter\u00e9 zabra\u0148uj\u00ed kontaminaci uhl\u00edkov\u00e9 oceli a zachycen\u00ed vlhkosti.<\/li>\n<\/ul>\n<p>Pokud se va\u0161e aplikace konkr\u00e9tn\u011b t\u00fdk\u00e1 \u0159et\u011bzu, p\u0159e\u010dt\u011bte si <a href=\"https:\/\/tuohaihardware.com\/cs\/rezavi-retezy-z-nerezove-oceli\/\">Rezav\u00ed \u0159et\u011bzy z nerezov\u00e9 oceli?<\/a> pro u\u017e\u0161\u00ed diskusi o expozici a \u00fadr\u017eb\u011b \u0159et\u011bzu.<\/p>\n<h2>\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n<h3>Znamen\u00e1 zbarven\u00ed \u010dajem, \u017ee sou\u010d\u00e1stka ztratila struktur\u00e1ln\u00ed pevnost?<\/h3>\n<p>Ne nutn\u011b. \u010cajov\u00e9 skvrny mohou za\u010d\u00edt jako povrchov\u00e9 zabarven\u00ed kolem mal\u00fdch d\u016flk\u016f, zejm\u00e9na tam, kde na odkryt\u00e9 nerezov\u00e9 oceli z\u016fst\u00e1vaj\u00ed usazeniny soli. Jeho v\u00fdznam z\u00e1vis\u00ed na hloubce d\u016flk\u016f, zb\u00fdvaj\u00edc\u00ed \u010d\u00e1sti, funkci v\u00fdrobku a na tom, zda je koroze st\u00e1le aktivn\u00ed. Prohl\u00e9dn\u011bte nosn\u00e9 \u010d\u00e1sti, m\u00edsto abyste je posuzovali pouze podle barvy.<\/p>\n<h3>Jak\u00e9 z\u00e1znamy byste si m\u011bli vy\u017e\u00e1dat, pokud se p\u0159i vstupn\u00ed kontrole zjist\u00ed rez?<\/h3>\n<p>Po\u017e\u00e1dejte o identifikaci materi\u00e1lu, z\u00e1znamy o v\u00fdrob\u011b a povrchov\u00e9 \u00faprav\u011b svar\u016f, z\u00e1znamy o \u010di\u0161t\u011bn\u00ed nebo pasivaci, pokud je to uvedeno, fotografie z inspekce, informace o balen\u00ed a dohodnut\u00fd protokol o korozn\u00edch zkou\u0161k\u00e1ch, pokud byl vy\u017eadov\u00e1n. Tyto z\u00e1znamy pom\u00e1haj\u00ed odd\u011blit probl\u00e9m s materi\u00e1lem od kontaminace, po\u0161kozen\u00ed zp\u016fsoben\u00e9ho zpracov\u00e1n\u00edm nebo skladov\u00e1n\u00edm.<\/p>\n<h3>M\u016f\u017ee koroze za\u010d\u00edt b\u011bhem p\u0159epravy nebo skladov\u00e1n\u00ed?<\/h3>\n<p>Ano. Kondenzace, zachycen\u00e1 vlhkost, zbytky sol\u00ed, prach z uhl\u00edkov\u00e9 oceli a kontakt s rezav\u00fdmi obaly nebo skladovac\u00edm za\u0159\u00edzen\u00edm mohou p\u0159ed instalac\u00ed zanechat skvrny nebo napadnout sou\u010d\u00e1st. V p\u0159\u00edpad\u011b pot\u0159eby specifikujte \u010dist\u00e9 odd\u011blen\u00ed, such\u00e9 obaly, odvodn\u011bn\u00ed nebo v\u011btr\u00e1n\u00ed a vstupn\u00ed kontrolu, kter\u00e1 odli\u0161\u00ed odstranitelnou kontaminaci od prohlubn\u00ed.<\/p>\n<h3>Pro\u010d se rezav\u00e9 skvrny po \u010di\u0161t\u011bn\u00ed vracej\u00ed?<\/h3>\n<p>\u010ci\u0161t\u011bn\u00ed m\u016f\u017ee odstranit viditeln\u00fd produkt koroze, ani\u017e by se odstranilo zabudovan\u00e9 \u017eelezo, zachycen\u00e9 chloridy nebo d\u016flek, kter\u00fd udr\u017euje kontaminaci. Pokud se skvrny vr\u00e1t\u00ed, prozkoumejte zdroj a pou\u017eijte vhodn\u00fd n\u00e1pravn\u00fd postup nam\u00edsto opakovan\u00e9ho le\u0161t\u011bn\u00ed viditeln\u00e9 stopy.<\/p>\n<h3>Prokazuje materi\u00e1lov\u00fd certifik\u00e1t, \u017ee hotov\u00fd d\u00edl nebude korodovat?<\/h3>\n<p>Ne. Materi\u00e1lov\u00fd certifik\u00e1t m\u016f\u017ee pomoci ov\u011b\u0159it uv\u00e1d\u011bn\u00fd druh nebo slo\u017een\u00ed slitiny, ale nedokazuje, \u017ee v\u00fdroba, povrchov\u00e1 \u00faprava svar\u016f, \u010di\u0161t\u011bn\u00ed, balen\u00ed, konstrukce nebo provozn\u00ed prost\u0159ed\u00ed jsou vhodn\u00e9. Kontrola koroze vy\u017eaduje, aby byly tyto polo\u017eky kontrolov\u00e1ny samostatn\u011b.<\/p>\n<h2>Z\u00e1v\u011br<\/h2>\n<p>Prevence koroze nerezov\u00e9 oceli vy\u017eaduje, aby pl\u00e1n jakosti, n\u00e1vrhu, v\u00fdroby, \u010di\u0161t\u011bn\u00ed a kontrol odpov\u00eddal skute\u010dn\u00e9mu prost\u0159ed\u00ed. Ve sv\u00e9 popt\u00e1vce (RFC) uve\u010fte dodavateli provozn\u00ed podm\u00ednky, po\u017eadavky na materi\u00e1l a povrch, mechanick\u00e9 po\u017eadavky, zku\u0161ebn\u00ed metodu a krit\u00e9ria p\u0159ijet\u00ed p\u0159ed zah\u00e1jen\u00edm v\u00fdroby.<\/p>","protected":false},"excerpt":{"rendered":"<p>Stainless steel is corrosion-resistant, not corrosion-proof. If its grade, surface, design, and working environment do not match, a part can develop stains, pits, corrosion around [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":19108,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-19110","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Corrosion in Stainless Steel: Causes, Types, and Prevention<\/title>\n<meta name=\"description\" content=\"Learn what causes corrosion in stainless steel, how to identify pitting, crevice corrosion, and other types, and how to prevent repeat failures.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/tuohaihardware.com\/cs\/koroze-v-nerezove-oceli\/\" \/>\n<meta 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