Electrochemical deposition and corrosion stability of Zn-Co alloy coatings

The influence of the type of the deposition solution, deposition current density and temperature of deposition solution on the phase structure and corrosion properties of Zn-Co alloys was examined. Alloys were deposited on a rotating disc electrode from chloride and sulphate plating bath. The phase structure was determined by anodic linear sweep voltammetry (ALSV) and corrosion properties by polarization measurements. It was shown that Zn-Co alloys with the best corrosion properties, among all investigated in this work, were obtained from chloride plating bath at room temperature at 4,5 and 5 A dm-2.