Corrosion resistance mechanism of a novel porous Ti/Sn-Sb-RuOx/β-PbO2 anode for zinc electrowinning

• DOI: 10.1016/j.corsci.2018.08.049
• Publication Date: 2018-08-28T17:10:04Z
• Authors: Buming Chen; Shichuan Wang; Jianhua Liu; Hui Huang; Cansheng Dong; Yapeng He; Wenkai Yan; Zhongcheng Guo; Ruidong Xu; Haitao Yang
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract Sn-SbOx, Sn-Sb-RuOx, and β-PbO2 coatings were successfully deposited on a titanium substrate by using the thermal deposition and electrodeposition methods, and their electrochemical properties were investigated in detail. The Sn-Sb-RuOx interlayer played a very important role in enhancing the stability of the PbO2 coating electrodeposited at a low current density. The scanning electron microscopy results showed that the cracks in the Sn-Sb-RuOx coating were larger than those in the Sn-SbOx coating. Moreover, the Ti/Sn-Sb-RuOx/β-PbO2 coating had many large pits with pore diameters in the range of 50–180 μm and pore depths of