{"id":2893,"date":"2020-12-09T06:23:05","date_gmt":"2020-12-09T06:23:05","guid":{"rendered":"https:\/\/3.212.105.250\/?p=2893"},"modified":"2025-07-26T15:45:10","modified_gmt":"2025-07-26T21:45:10","slug":"pruvodce-vysokoteplotni-korozi","status":"publish","type":"post","link":"https:\/\/vm6fr4whzn6.c.updraftclone.com\/cs\/2020\/12\/09\/pruvodce-vysokoteplotni-korozi\/","title":{"rendered":"Pr\u016fvodce vysokoteplotn\u00ed koroz\u00ed"},"content":{"rendered":"

Existuje mnoho r\u016fzn\u00fdch typ\u016f koroze, o kter\u00fdch by m\u011bly za\u0159\u00edzen\u00ed a dal\u0161\u00ed oblasti, kter\u00e9 pracuj\u00ed s kovov\u00fdmi aplikacemi, v\u011bd\u011bt. V\u011bt\u0161ina t\u011bchto typ\u016f koroze vy\u017eaduje p\u0159\u00edtomnost kapaliny. Pro mnoh\u00e9 nezn\u00e1m\u00e1 kapalina nen\u00ed podm\u00ednkou vzniku koroze. Nejb\u011b\u017en\u011bj\u0161\u00ed forma koroze se naz\u00fdv\u00e1 galvanick\u00e1 koroze. Galvanick\u00e1 koroze vznik\u00e1 dlouhodob\u00fdm p\u016fsoben\u00edm vlhkosti. Tou m\u016f\u017ee b\u00fdt jak\u00e1koli forma kapaliny v\u010detn\u011b vody, vlhk\u00e9ho vzduchu, korozivn\u00edch materi\u00e1l\u016f a dal\u0161\u00edch. Existuj\u00ed tak\u00e9 formy koroze, kter\u00e9 napadaj\u00ed kovy i bez p\u0159\u00edtomnosti kapalin. Tento typ koroze se naz\u00fdv\u00e1 vysokoteplotn\u00ed koroze. Vyskytuje se v mnoha podob\u00e1ch a m\u00e1 mnoho p\u0159\u00ed\u010din. Prozkoumejte tohoto pr\u016fvodce vysokoteplotn\u00ed koroz\u00ed a zjist\u011bte v\u00edce o tom, jak vznik\u00e1, jak chr\u00e1nit sv\u00e9 konstrukce a dal\u0161\u00ed informace.<\/p>\n

Vysokoteplotn\u00ed koroze: Z\u00e1kladn\u00ed informace o korozi.<\/h2>\n

Vysokoteplotn\u00ed koroze je zp\u016fsobena chemick\u00fdm p\u016fsoben\u00edm plyn\u016f, sol\u00ed a roztaven\u00fdch kov\u016f. Vysokoteplotn\u00ed koroze je korozn\u00ed napaden\u00ed bez kapaliny, kter\u00e9 m\u016f\u017ee v\u00fdrazn\u011b ovlivnit n\u011bkter\u00e9 kovov\u00e9 aplikace. Za vysok\u00e9 teploty se pova\u017euje teplota 400 stup\u0148\u016f Celsia a vy\u0161\u0161\u00ed.<\/p>\n

Jedn\u00edm z nejv\u00edce frustruj\u00edc\u00edch nebezpe\u010d\u00ed vysokoteplotn\u00ed koroze je, \u017ee m\u016f\u017ee n\u00e1sledn\u011b zp\u016fsobit napaden\u00ed mokrou koroz\u00ed. Tento cyklus m\u016f\u017ee b\u00fdt \u0161kodliv\u00fd pro mnoho kovov\u00fdch aplikac\u00ed. N\u00ed\u017ee uv\u00e1d\u00edme n\u011bkolik p\u0159\u00edklad\u016f b\u011b\u017en\u00fdch typ\u016f vysokoteplotn\u00ed koroze.<\/p>\n

Oxidace<\/h3>\n

Oxidace je reakce, kter\u00e1 prob\u00edh\u00e1 mezi kysl\u00edkem a kovem. Pokud se oxid pr\u016fb\u011b\u017en\u011b tvo\u0159\u00ed a poda\u0159\u00ed se mu odd\u011blit slitinu od atmosf\u00e9ry, m\u016f\u017ee to b\u00fdt pozitivn\u00ed. Kdy\u017e se neda\u0159\u00ed odd\u011blit slitinu a atmosf\u00e9ry m\u016f\u017ee zp\u016fsobit korozi<\/a>.<\/p>\n

Karbonizace<\/h3>\n

K nauhli\u010dov\u00e1n\u00ed doch\u00e1z\u00ed, kdy\u017e se uhl\u00edk spoj\u00ed s chromem. K tomu \u010dasto doch\u00e1z\u00ed na hranic\u00edch zrn, co\u017e zp\u016fsobuje korozi a zvy\u0161uje k\u0159ehkost kovov\u00fdch povrch\u016f. Sni\u017euje tak\u00e9 odolnost kovu v\u016f\u010di oxidaci, \u010d\u00edm\u017e p\u0159ipravuje p\u016fdu pro dal\u0161\u00ed korozi.<\/p>\n

Nitridace<\/h3>\n

Kovy, kter\u00e9 jsou vystaveny p\u016fsoben\u00ed amoniaku nebo dus\u00edku p\u0159i vysok\u00fdch teplot\u00e1ch, jsou vystaveny zv\u00fd\u0161en\u00e9mu riziku nitridace. Ta zp\u016fsobuje vznik tvrd\u00e9ho, k\u0159ehk\u00e9ho kovu. T\u00e9to korozi lze zabr\u00e1nit p\u0159id\u00e1n\u00edm niklu jako leguj\u00edc\u00edho prvku do kovu.<\/p>\n

Roztaven\u00e1 s\u016fl<\/h3>\n

Roztaven\u00e9 soli se \u010dasto pou\u017e\u00edvaj\u00ed v tepl\u00e1rn\u00e1ch, jadern\u00fdch elektr\u00e1rn\u00e1ch a n\u011bkdy i v koncentrovan\u00fdch sol\u00e1rn\u00edch elektr\u00e1rn\u00e1ch. Kdy\u017e se kov dostane do kontaktu s roztavenou sol\u00ed p\u0159i vysok\u00fdch teplot\u00e1ch, m\u016f\u017ee rychle doj\u00edt ke korozi. Roztaven\u00e9 soli odstra\u0148uj\u00ed z povrchu kovu oxidov\u00e9 usazeniny, co\u017e zp\u016fsobuje zten\u010den\u00ed kovu, tvorbu d\u016flk\u016f nebo mezikrystalov\u00e9 napaden\u00ed.<\/p>\n

Sulfidace<\/h3>\n

Sulfidaci zp\u016fsobuje p\u0159\u00edtomnost s\u00edry. S\u00edra je \u010dasto p\u0159\u00edtomna v ne\u010dist\u00e9 rop\u011b, co\u017e zvy\u0161uje riziko pro potrub\u00ed. Sulfidace zp\u016fsobuje zten\u010den\u00ed st\u011bn potrub\u00ed a m\u016f\u017ee v\u00e9st i k poru\u0161en\u00ed potrub\u00ed, co\u017e zp\u016fsobuje \u00faniky, \u00faniky a dal\u0161\u00ed prasknut\u00ed.<\/p>\n

Roztaven\u00fd kov<\/h3>\n

P\u0159i pou\u017eit\u00ed kapaln\u00fdch kov\u016f k p\u0159enosu tepla m\u016f\u017ee doj\u00edt ke kontaktu kontaminuj\u00edc\u00edho materi\u00e1lu s roztaven\u00fdm kovem a ke korozi. Jedin\u00fdm skute\u010dn\u00fdm zp\u016fsobem, jak t\u00e9to korozi zabr\u00e1nit, je d\u016fkladn\u00e1 znalost toho, jak roztaven\u00e9 kovy reaguj\u00ed s ur\u010dit\u00fdmi materi\u00e1ly v ochrann\u00e9m syst\u00e9mu.<\/p>\n

Halogen<\/h3>\n

Halogenov\u00e1 koroze vznik\u00e1 p\u0159i reakci kov\u016f s halogenov\u00fdmi plyny za vysok\u00fdch teplot. Na povrchu kovu se mohou tvo\u0159it t\u011bkav\u00e9 halogenidy kov\u016f. To m\u016f\u017ee zp\u016fsobit v\u00e1\u017en\u00e9 probl\u00e9my u mnoha kov\u016f, av\u0161ak nerezov\u00e1 ocel je k t\u00e9to form\u011b koroze obzvl\u00e1\u0161t\u011b n\u00e1chyln\u00e1.<\/p>\n

Metody prevence koroze p\u0159i vysok\u00fdch teplot\u00e1ch<\/h2>\n

Bez kontroly teplot, kter\u00fdm jsou kovy vystaveny, lze jen m\u00e1lo zp\u016fsoby zabr\u00e1nit vzniku vysokoteplotn\u00ed koroze. Ka\u017ed\u00fd typ vysokoteplotn\u00ed koroze m\u00e1 krom\u011b teplot i jin\u00e9 p\u0159\u00ed\u010diny, tak\u017ee je obt\u00ed\u017en\u00e9 naj\u00edt plo\u0161n\u00e9 \u0159e\u0161en\u00ed.<\/p>\n

Zjist\u011bte, kter\u00e9 kovy snesou a kter\u00e9 nesnesou vysok\u00e9 teploty, a podle toho upravte pl\u00e1ny. Pokud nap\u0159\u00edklad v\u00edte, jak je nerezov\u00e1 ocel n\u00e1chyln\u00e1 ke korozi zp\u016fsoben\u00e9 halogeny, je nejlep\u0161\u00ed vylou\u010dit pou\u017eit\u00ed jak\u00e9koli nerezov\u00e9 oceli v oblastech, kde by mohla b\u00fdt potenci\u00e1ln\u011b vystavena p\u016fsoben\u00ed halogenov\u00fdch plyn\u016f, nebo v jejich okol\u00ed.<\/p>\n

Nejlep\u0161\u00edm zp\u016fsobem, jak zabr\u00e1nit jak\u00e9koliv form\u011b koroze, je vyu\u017e\u00edt slu\u017eeb odborn\u00edk\u016f a nechat sv\u00e9 za\u0159\u00edzen\u00ed pravideln\u011b kontrolovat, abyste zjistili, jak zlep\u0161it prevenci koroze a jak identifikovat p\u0159\u00edpadn\u00e9 probl\u00e9mov\u00e9 oblasti, abyste je mohli \u0159e\u0161it d\u0159\u00edve, ne\u017e se stanou rozs\u00e1hl\u00fdmi probl\u00e9my. N\u00ed\u017ee uv\u00e1d\u00edme n\u011bkolik slu\u017eeb, do kter\u00fdch je vhodn\u00e9 investovat.<\/p>\n

Katodick\u00e1 ochrana<\/h3>\n

Katodick\u00e1 ochrana je jedn\u00edm z nejlep\u0161\u00edch zp\u016fsob\u016f, jak zabr\u00e1nit korozi t\u00e9m\u011b\u0159 v ka\u017ed\u00e9 aplikaci. Existuje n\u011bkolik slu\u017eeb pro katodick\u00e9 ochrany si m\u016f\u017eete vybrat<\/a> z.<\/p>\n

N\u00e1vrh syst\u00e9mu<\/h4>\n

Katodick\u00e9 n\u00e1vrh syst\u00e9mu ochrany poskytuje kompletn\u00ed n\u00e1vrh syst\u00e9mu<\/a>, dohled nad konstrukc\u00ed syst\u00e9mu a objednan\u00e9 zkou\u0161ky, kter\u00e9 se \u0159\u00edd\u00ed osv\u011bd\u010den\u00fdmi postupy N\u00e1rodn\u00ed asociace korozn\u00edch in\u017een\u00fdr\u016f (NACE).<\/p>\n

Spu\u0161t\u011bn\u00ed a uveden\u00ed do provozu<\/h4>\n

Uveden\u00ed katodick\u00e9 ochrany do provozu v\u00e1m umo\u017en\u00ed soust\u0159edit se na podnik\u00e1n\u00ed bez starost\u00ed, proto\u017ee in\u017een\u00fd\u0159i s certifikac\u00ed NACE prov\u00e1d\u011bj\u00ed stavebn\u00ed dozor v ter\u00e9nu. Zajist\u00ed, \u017ee syst\u00e9m byl navr\u017een a postaven v souladu s pr\u016fmyslov\u00fdmi normami, a identifikuj\u00ed v\u0161echny p\u0159ehl\u00e9dnut\u00e9 syst\u00e9my.<\/p>\n

Anal\u00fdza ru\u0161en\u00ed<\/h4>\n

A ru\u0161en\u00ed katodick\u00e9 ochrany<\/a> Anal\u00fdza se prov\u00e1d\u00ed na z\u00e1klad\u011b r\u016fzn\u00fdch hodnocen\u00ed v ter\u00e9nu, aby se zjistilo, zda je sou\u010dasn\u00fd syst\u00e9m v po\u0159\u00e1dku a v dobr\u00e9 kondici.<\/p>\n

Pr\u016fzkumy<\/h4>\n

Katodick\u00e9 ochrann\u00e9 pr\u016fzkumy jsou pr\u016fb\u011b\u017en\u00e9 pr\u016fzkumy st\u00e1vaj\u00edc\u00edch pr\u016fzkum\u016f.<\/a> prov\u00e1d\u011bn\u00e9 za \u00fa\u010delem dosa\u017een\u00ed co nejlep\u0161\u00edch metod prevence koroze. Zku\u0161en\u00ed korozn\u00ed in\u017een\u00fd\u0159i pom\u00e1haj\u00ed ur\u010dit kroky pot\u0159ebn\u00e9 k ochran\u011b va\u0161ich velk\u00fdch kovov\u00fdch aplikac\u00ed.<\/p>\n

Anal\u00fdza a posuzov\u00e1n\u00ed potrub\u00ed a n\u00e1dr\u017e\u00ed<\/h3>\n

Anal\u00fdza a posouzen\u00ed potrub\u00ed a n\u00e1dr\u017e\u00ed pom\u00e1haj\u00ed ur\u010dit, kdy je \u010das investovat do nov\u00e9 infrastruktury. Posouzen\u00ed poskytuje informace o zb\u00fdvaj\u00edc\u00ed pevnosti a konstruk\u010dn\u00ed \u017eivotnosti v\u0161ech va\u0161ich aktiv. Pom\u00e1h\u00e1 tak\u00e9 z\u00edskat p\u0159ehled o v\u0161ech konstrukc\u00edch nebo oblastech, kter\u00e9 p\u0159edstavuj\u00ed vysok\u00e9 riziko a je t\u0159eba je neprodlen\u011b \u0159e\u0161it.<\/p>\n

Kontaktujte spole\u010dnost Dreiym Engineering je\u0161t\u011b dnes a vy\u017e\u00e1dejte si v\u0161echny v\u00fd\u0161e uveden\u00e9 slu\u017eby a dal\u0161\u00ed. Zam\u011bstn\u00e1v\u00e1me odborn\u00edky\u00a0poradci v oblasti korozn\u00edho in\u017een\u00fdrstv\u00ed<\/a>\u00a0jejich\u017e c\u00edlem je poskytnout v\u00e1m co nejlep\u0161\u00ed slu\u017eby, aby va\u0161e aplikace a konstrukce byly v bezpe\u010d\u00ed p\u0159ed \u0161kodami zp\u016fsoben\u00fdmi koroz\u00ed. A\u0165 u\u017e jsou va\u0161e probl\u00e9my zp\u016fsobeny potenci\u00e1ln\u00edm vznikem vysokoteplotn\u00ed koroze, galvanick\u00e9 koroze nebo jin\u00e9 formy koroze, m\u016f\u017eeme v\u00e1m pomoci zabr\u00e1nit dal\u0161\u00ed korozi a vydat doporu\u010den\u00ed pro posti\u017eenou konstrukci.<\/p>\n

P\u0159i navrhov\u00e1n\u00ed oblast\u00ed a aplikac\u00ed m\u011bjte na pam\u011bti tohoto pr\u016fvodce koroz\u00ed p\u0159i vysok\u00fdch teplot\u00e1ch. M\u011bjte na pam\u011bti teploty, kter\u00fdm jsou va\u0161e kovy vystaveny, a tak\u00e9 dal\u0161\u00ed materi\u00e1ly, kter\u00e9 mohou tvo\u0159it korozi zp\u016fsobenou chemick\u00fdm napaden\u00edm nebo vysokoteplotn\u00ed korozi. Pro v\u00edce informac\u00ed a spr\u00e1vn\u00e9 metody prevence se je\u0161t\u011b dnes obra\u0165te na spole\u010dnost Dreiym Engineering.<\/p>\n\"Vysokoteplotn\u00ed","protected":false},"excerpt":{"rendered":"

There are many different types of corrosion that facilities and other areas that work with metal applications should be aware of. Most of these corrosion types require the presence of a liquid. Unknown to many, liquid isn\u2019t a requirement for corrosion to form. The most common form of corrosion is called galvanic corrosion. Galvanic corrosion […]<\/p>\n","protected":false},"author":8,"featured_media":3505,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_mbp_gutenberg_autopost":false,"_pgmb_is_evergreen":true,"_pgmb_ap_template_id":0,"iawp_total_views":393,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-2893","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-corrosion-and-cathodic-protection"],"acf":[],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t