Effect of Thermal Decomposition Temperature on Microscopic Morphology and Performance of IrO2-RuO2-SnO2/Ti Anode
YANG Wenxiu1, WANG Bingbing1, YU Xiaohua1, TIAN Lin2,3, XIE Gang1,2,3,*
1 Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China 2 Kunming Metallurgical Research Institute, Kunming 650503, China 3 State Key Laboratory of Common Associated Non-ferrous Metal Resources Pressure Hydrometallurgy Technology, Kunming 650503, China
Abstract: In the zinc electrowinning of wet zinc refining process, the performance requirements of anode is very high, and the cost of preparing titanium anode completely with precious metal coating is very high, therefore, when preparing precious metal coated titanium anode, it is usually necessary to add a small amount of other low-cost catalytic metal elements in the coating to achieve a suitable catalytic effect. In this work, IrO2-RuO2-SnO2/Ti anodes were prepared by thermal decomposition method. The surface morphology, microstructure and electrochemical properties of the IrO2-RuO2-SnO2/Ti anode coatings at different temperatures were analysed. The results showed that, when the temperature was 450 ℃, the surface of the coating is the most dense, the grain size was relatively small, the catalytic activity and corrosion resistance of the anode were the strongest, and the oxygen precipitation potential was as low as 0.882 V, which was conducive to prolonging the service life of the anode, and the comprehensive performance of IrO2-RuO2-SnO2/Ti anode was the best.
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2024, Vol. 38 
