Silicate-Based Passivation Technique on Alkaline Electrodeposited Zinc Coatings
In order to reduce the environmental pollution from chromate used in plating factories, one new kind of non-chromium passivation solution containing silicate, hydrogen peroxide and fluoride ion, etc. has been explored to form blue-white conversion film on alkaline electrodeposited zinc coatings. The conversion films on zinc coatings with both glossy blue-white surface and high anti-corrosion performance have been obtained by optimizing the experimental conditions. The results show that silicate-based passivation technique is able to be widely applied to solve the problem of pollution caused by waste from plating industry in the future.
Zhengyi Jiang, Xianghua Liu and Jinglong Bu
Y. Y. Fan et al., "Silicate-Based Passivation Technique on Alkaline Electrodeposited Zinc Coatings", Advanced Materials Research, Vols. 154-155, pp. 433-436, 2011