通过复合电沉积的方法制备新型三价铬镀铬用PbO2-CeO2-ZrO2惰性阳极材料,采用电化学方法测试分析电极材料的沉积机理、耐蚀性和催化活性;利用扫描电镜和能谱观察电极材料的微观形貌和元素含量。结果表明:镀层的沉积符合Johnson机理,PbO2的沉积过程非常稳定;ZrO2浓度为20g/L制备的复合惰性阳极材料耐蚀性好,催化活性高;ZrO2的加入对镀层的微观形貌影响不明显,随镀液中ZrO2浓度增大,镀层中CeO2的含量总体稳定,ZrO2的含量呈现先增大后减小的趋势。
The inert anodes material PbO2-CeO2-ZrO2 was prepared by using composite electrodeposi- tion for trivalent chromium plating. Deposition mechanism, corrosion resistance and catalytic activity of electrode materials were analyzed by using electrochemical measurement methods. The micro-morphology and elemental content of electrode materials were studied by SEM and EDS. The results show that the deposition of the coating accords with Johnson mechanism, the deposition process of PbO2 is very stable. The inert anode material has good corrosion resistance, high catalytic activity when ZrO2 concentration is 20g/L in bath. The influence of nano-ZrO2 for micro-morphology is not obvious, with the ZrO2 content increasing in the bath, the CeO2 content is stable and the ZrO2 content increases first and then decreases in coating.