Corrosion kev ua tau zoo thiab daim ntawv thov ntawm Incoloy 800 alloy cua sov raj:

Corrosion kev ua tau zoo thiab daim ntawv thov ntawm Incoloy 800 alloy cua sov raj:

Cov ntsiab lus nickel ntawm 800 series alloy yog ntau dua li ntawm 304 stainless hlau tsev neeg. Hauv ntau qhov xwm txheej, 800 series alloy thiab 304 stainless hlau zoo sib xws. Piv txwv li, nyob rau hauv ntau cov khoom siv roj thiab tshuaj lom neeg xws li nitric acid thiab organic acids, lawv zoo sib xws. kev ua tau zoo. Tsis yog 800 series alloy lossis 304 stainless hlau tuaj yeem siv nyob rau hauv ib puag ncig sulfuric acid, tshwj tsis yog tias nws tsis kub thiab tsis tshua muaj siab. Zoo li austenitic stainless hlau, yog hais tias 800 series alloy yog rhuab ntev heev nyob rau hauv qhov ntau ntawm 538 degree -760 degree, chromium carbides yuav precipitate ntawm grain ciam teb ntawm cov alloy, uas yuav sensitize lub alloy thiab ua rau cov alloy coj. zoo li pickling. Intergranular corrosion tshwm sim nyob rau hauv ib puag ncig ntawm qhov kub thiab txias thiab 65 feem pua ​​nitric acid.

Daim ntawv thov feem ntau ntawm 800 alloy yog cov ntawv siv kub kub, xws li cov khoom siv hluav taws xob, petrochemical hloov kho, hydrocracking yeeb nkab fittings, superheated chav kho cov cuab yeej hauv cov pa hluav taws xob thiab cov chaw tsim hluav taws xob nuclear. Cov ntsiab lus siab ntawm chromium thiab npib tsib xee ua rau 800 series alloys muaj kev tiv thaiv zoo rau oxidation thiab carbonization.

(1) Raws li ASME tus qauv, nws muaj lub zog tsim muaj zog thaum thov ntawm 899 degree;
(2) Lub raj siv tau ntawm qhov kub thiab txias hauv qab 982 degree;
(3) Tseem muaj oxidation tsis kam ntawm 1038 degree;
(4) Ua rau chloride ion corrosion.

Txawm hais tias 800 series alloy tsis muaj kev tiv thaiv rau chloride ion kev nyuaj siab corrosion cracking, nws cov corrosion kuj tseem zoo heev. Nws muaj corrosion kuj zoo nyob rau hauv roj av, tshuaj, zaub mov, pulp thiab ntawv industries. Pom tseeb, 800 series alloy tuaj yeem siv nyob rau hauv ib puag ncig corrosive uas ua rau muaj kev ntxhov siab corrosion ntawm cov hlau tsis zoo austenitic. Txawm li cas los xij, 800 series alloy tsis muaj kev tiv thaiv rau kev ntxhov siab corrosion cracking ntawm MgCl2 tov.

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