Black zinc-hot wexagonal
Ta hanyar baki passivation ruwa ruwa mai dauke da gishiri (C2D), gwajin guda 10-15mm an kafa shi, kuma gwajin spray spray ya kai awanni 96. Yanayin tsabtace jiki zincting amfani da trivalent pasul chromium chromium, bai ƙunshi hexovalent comromic, kuma ya hada da ka'idodin rohs.