2007 Volume 48 Issue 8 Pages 2165-2169
In a previous study, the properties and mechanism of peeling in terms of nickel electroforming were investigated by changing the activation treatment and the surface roughness of the plate and varying the treatment conditions (concentration, time, and temperature) of potassium dichromate solution. In this study, the chromate treatment was carried out on noble metals, base metals, and Cu-Zn alloy. It was found that chromate films can be formed on noble metal plates. The thickness of chromate film was different on noble metal and base metal plates, and was less than about 15 nm on the noble metal plates, but was in the order of the standard electrode potentials (SEP) on base metal plates. It was found that the chromate films formed on all metal plates contained metal elements of that plate.
