Zn-Ni alloy coating made of chloride electrolyte

Abstract

Electrodeposition coating based on Zn-Ni alloys was made of chloride electrolyte which contains 142.56 g/dm3 NiCl2x6H2O; 109.03 g/dm3 ZnCl2; 30.9 g/dm3 H3BO3; 223.65 g/dm3 KCl; 40.99 g/dm3 CH3COONa. As the result coatings of different sizes and different amount of Ni in each coating were prepared. The samples were tested in salt spray chambers according to BS EN ISO 10289:2001 standard. The best results showed coatings which were over 10 μm thick and which contained up to 15% of Nickle. There were no signs of corrosion even after 2160 hours of being in salt spray chambers.