Lub hauv paus ntsiab lus ntawm ferromolybdenum discoloration vim noo noo

Cov oxides nyob rau hauv oxide txheej nyob rau saum npoo ntawm ferromolybdenum reacts nrog ya raws thiab carbon dioxide nyob rau hauv ib tug ntub ib puag ncig los tsim ib tug carbonate, uas yuav ua rau cov oxide txheej thicker thiab kuj hloov xim ntawm nto. Ferromolybdenum yog cov khoom siv alloy feem ntau muaj ob lub ntsiab lus: molybdenum thiab hlau. Nyob rau hauv ib qho chaw ntub dej, cov tshuaj tiv thaiv oxidation yuav tshwm sim rau ntawm qhov chaw ntawm ferromolybdenum, tsim ib txheej ntawm oxide, uas yuav maj mam ua thicker nrog cov degree ntawm oxidation ntawm qhov chaw. Thaum cov oxide txheej nyob rau saum npoo ntawm ferromolybdenum ntsib qhov chaw ntub dej, nws yuav nqus dej noo thiab cov pa roj carbon dioxide hauv huab cua, yog li tsim cov txheej txheem passivation, uas tuaj yeem tiv thaiv ferromolybdenum los ntawm kev ntxiv oxidation. Txawm li cas los xij, thaum cov txheej txheej passivation cuam tshuam los ntawm cov dej noo, nws yuav nqus dej ntau dua thiab cov pa roj carbon dioxide, ua rau cov txheej txheej oxide ua kom tuab dua thiab cov xim hloov. Feem ntau hais lus, lub thicker txheej oxide nyob rau saum npoo ntawm ferromolybdenum, cov xim tsaus, xws li los ntawm lub teeb grey mus rau tsaus grey, xiav grey, dub grey thiab lwm yam xim txawv.