为寻找一种适合锌电积用Pb-Ag合金阳极的替代材料，在铝合金基体表面采用脉冲电沉积从镀液中制备了Al/Pb/α-PbO2-WC复合惰性阳极材料，研究了制备镀液中WC添加量对复合惰性阳极材料在锌电积模拟溶液中电化学性能的影响，测试了阳极极化曲线、塔菲尔极化曲线和循环伏安曲线．结果表明：复合惰性阳极材料在锌电积模拟溶液中的析氧过电位随制备镀液中WC颗粒添加量的增加先降低后升高，WC颗粒的质量浓度控制在30 g/L时，制备的复合惰性阳极材料析氧电催化活性最好；测试电流密度为500 A/m2时，Al/Pb/α-PbO2-WC复合惰性阳极材料的析氧过电位比Al/Pb/α-PbO2降低67 mV，比Pb-1．0％Ag合金降低126 mV；复合惰性阳极材料在锌电积模拟溶液中的腐蚀电位较高，腐蚀电流密度较低，耐腐蚀性较好．
In search of a anodic material used in zinc electrowinning in place of Pb-Ag alloy, Al/Pb/α-PbO2-WC composite inert anodes on the surface of aluminum alloy substrates were prepared by pulse electrodeposition from a bath, the effects of WC concentrations in a original plating bath on the electrochemical properties of the composite inert anodes were researched in a synthetic zinc electrowinning simulated solution, and the anodic polarization curves, Tafel polarization curves and cyclic voltammetry curves were measured. The results show that the oxygen evolution overpotential of Al/Pb/α-PbO2-WC composite inert anodes firstly decrease and then increase with the increasing of WC concentrations in a original plating bath, and the best electrocatalytic activity of oxygen evolution is obtained under the WC concentration of 30 g/L. Compared with Al/Pb/α-PbO2 composite inert anode and Pb-1%Ag alloy, the oxygen evolution overpotentials of Al/Pb/α-PbO2-WC composite inert anodes reduce 67 mV and 126 mV respectively under 500 A/m2 testing current density. The composite inert anodes have higher corrosion potential and lower corrosion current density, displaying better corrosion resistance.
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