Ta hanyar baƙar fata ta passivation ruwa mai ruwa (C2D) wanda ke ɗauke da gishiri ko gishiri da gishiri, an kafa fim ɗin baƙar fata mai kauri tare da kauri na kimanin 10-15μm. Kudin yana da girma amma bayyanar ta zama na musamman.
Yi amfani da passiving mai launi (C2c), shirya lokacin farin ciki 8-15μm, gwajin feshin mai gishiri zai iya isa sama da sa'o'i 72, bayyanar launuka masu launuka, mafi kyawun yanayin lalata.
GB / t 882-2008 "PIN" misali, diamialin maras muhimmanci, bakin karfe, da sauransu, a layi tare da C1B ko C1A Post-buƙatun na Carb.
Kamfaninmu yafi samar da kuma siyar da kuliyoyi daban-daban, hoops, kayan haɗi na hoto, tsarin ƙarfe ya rufe sassan, da sauransu.