Izinsimbi eziningi zizokwakha ifilimu ye-oxide phezulu ngesikhathi senqubo yokusabela komoya-mpilo emoyeni.Kodwa ngeshwa, izinhlanganisela ezakhiwe ngensimbi ye-carbon evamile zizoqhubeka nokukhipha i-oxidize, okwenza ukugqwala kukhule ngokuhamba kwesikhathi, futhi ekugcineni kwakhe izimbobo.Ukuze sigweme lesi simo, ngokuvamile sisebenzisa upende noma izinsimbi ezimelana ne-oxidation (ezifana ne-zinc, nickel, ne-chromium) ukwenza i-electroplating endaweni ye-carbon steel.
Lolu hlobo lokuvikela luyifilimu yepulasitiki nje.Uma ungqimba oluvikelayo lubhujiswa, insimbi engaphansi izoqala ukugqwala.Lapho kunesidingo khona, kunesixazululo, futhi ukusetshenziswa kwensimbi engagqwali kungaxazulula ngokuphelele le nkinga.
Ukumelana nokugqwala kwensimbi engagqwali kuncike entweni ethi "chromium" ekubunjweni kwayo, ngoba i-chromium ingenye yezingxenye zensimbi, ngakho-ke izindlela zokuvikela azifani.Uma okuqukethwe kwe-chromium kufinyelela ku-10.5%, ukumelana nokugqwala komkhathi kwensimbi kukhuphuka kakhulu, kodwa lapho okuqukethwe kwe-chromium kuphezulu, nakuba ukumelana nokugqwala kusengathuthukiswa, umphumela awubonakali.
Isizathu siwukuthi lapho i-chromium isetshenziselwa ukwelashwa kokuqinisa okusanhlamvu okucolisekileyo kwensimbi, uhlobo lwe-oxide yangaphandle luyashintshwa lube i-oxide engaphezulu efana naleyo eyakhiwe kunsimbi emsulwa ye-chromium.Le oxide yensimbi enothe nge-chromium enamathele ngokuqinile ivikela ubuso ekuqhubekeleni phambili nokuphuma emoyeni.Lolu hlobo longqimba lwe-oxide luncane kakhulu, futhi ukucwebezela kwemvelo ngaphandle kwensimbi kungabonakala ngalo, okwenza insimbi engagqwali ibe nendawo eyinsimbi eyingqayizivele.
Ngaphezu kwalokho, uma ungqimba olungaphezulu lulimele, ingxenye eveziwe yobuso izozilungisa ngokwayo ngokusabela komkhathi futhi yenze kabusha le "filimu ye-passive" ukuze iqhubeke idlala indima yokuvikela.Ngakho-ke, zonke izinsimbi ezingenasici zinesici esivamile, okungukuthi, okuqukethwe kwe-chromium kungaphezu kuka-10.5%.
Isikhathi sokuthumela: Dec-19-2022