高速黒色電気めっき法の開発
1991 年 77 巻 8 号 p. 1344-1351
詳細
1991 年 77 巻 8 号 p. 1344-1351
High speed black electroplating process was developed. The black coatings are deposited on cathode surface by electrolysis in acid solution containing Zn2+, Ni2+, Cr3+ and No3-. Quantity of electricity to obtain the black surface is only 2×103 C/m2.
The black coatings are mainly composed of hydrated oxides, metallic Zn and Zn-Ni alloy.
The blacked Zn-Ni alloy plated steel sheet with chromate and resin coat has excellent properties, for example, scratch resistance, corossion resistance and weldability.
