Chifukwa chiyani chitsulo chosapanga dzimbiri sichichita dzimbiri?

Chitsulo chosapanga dzimbiri chimakhala ndi chromium yochepera 10.5%, yomwe imapanga wosanjikiza wopyapyala, wosawoneka, komanso womatira kwambiri pamwamba pa chitsulo chotchedwa "passive layer".Chitsulo chosapanga dzimbiri chimenechi ndi chimene chimapangitsa kuti zitsulo zosapanga dzimbiri zisachite dzimbiri komanso dzimbiri.

Chitsulocho chikakumana ndi okosijeni ndi chinyezi, chromium muchitsulocho imachita ndi okosijeni wamumlengalenga kupanga wosanjikiza woonda wa chromium oxide pamwamba pa chitsulocho.Chosanjikiza cha chromium oxide ichi ndi choteteza kwambiri, chifukwa chimakhala chokhazikika komanso chosasweka mosavuta.Chotsatira chake, chimalepheretsa zitsulo pansi pake kuti zisagwirizane ndi mpweya ndi chinyezi, zomwe ndizofunikira kuti dzimbiri zichitike.

Chosanjikiza chokhazikika ndi chofunikira kwambiri pakukana kwa chitsulo chosapanga dzimbiri, ndipo kuchuluka kwa chromium muchitsulo kumatsimikizira kuthekera kwake kokana dzimbiri ndi dzimbiri.Kuchulukira kwa chromium kumapangitsa kuti pakhale kusanjikiza kotetezeka komanso kukana dzimbiri bwino.Kuphatikiza apo, zinthu zina monga faifi tambala, molybdenum, ndi nayitrogeni zitha kuwonjezeredwa kuchitsulocho kuti chiwonjezeke kukana dzimbiri.