Zaj sawv Chromate Passivation (C2C) yog ua raws li electrogalvanizing los tsim cov xim uas passivation zaj duab xis nrog lub tuab ntawm li 8-15μm. Lub ntsev ua tshuaj txau tshuaj yuav nyob ntev tshaj 72 teev yam tsis muaj xeb dawb.
Ua los ntawm Q235 carbon hlau thiab lwm cov ntaub ntawv, qhov chaw yog Electro-greating, thiab cov txheej txheem txheej xim dawb yog 5-12μm, uas ua tau raws li cov kev kho mob tom qab muaj 5,
Peb lub tuam txhab tsuas yog ua lag luam thiab muag ntau lub hwj chim bolts, hoops, photovoltaic accetor, thiab lwm yam.