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研究了不锈钢基体上PbO2-WC-CeO2复合电极材料的电沉积工艺,通过分析其在由65g/LZn2+和150g/LH2SO4组成的电解锌液中的析氧动力学参数、Tafel曲线以及扫描电镜观察,考察了温度、电流密度和WC、CeO2固体颗粒质量浓度对该电极催化活性和耐蚀性的影响,确定了复合电沉积的较佳工艺:CeO240g/L和WC20g/L,电流密度25mA/cm2,温度60°C。在此工艺条件下可以获得致密、均匀的不锈钢基PbO2-WC-CeO2复合电极材料,其交换电流密度为0.732A/cm2,腐蚀电流密度为3.924×105A/cm2。
The electrodeposition technology of PbO2-WC-CeO2 composite electrode material on a stainless steel substrate was studied. By analyzing the oxygen evolution kinetics parameters, Tafel curve and scanning electron microscopy in the electrolytic zinc solution composed of 65g / L Zn2 + and 150g / LH2SO4, The effects of temperature, current density, mass concentration of WC and CeO2 solid particles on the catalytic activity and corrosion resistance of the electrode were investigated. The optimum conditions of composite electrodeposition were determined: CeO240g / L and WC20g / L, current density 25mA / Temperature 60 ° C. The dense and uniform stainless steel-based PbO2-WC-CeO2 composite electrode material can be obtained under such conditions. The exchange current density is 0.732A / cm2 and the corrosion current density is 3.924 × 105A / cm2.