摘要
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。
Abstract： The electrodeposition of PbO2-WC-CeO2 composite electrode on stainless steel substrate was studied. The effects of temperature, current density, and mass concentrations of WC and CeO2 particles on the catalytic activity and corrosion resistance of the electrode were examined by analysis of the kinetic parameters of oxygen evolution and Tafel curves in a zinc-containing electrolyte comprising Zn2＋ 65 g/L and H2504 150 g/L and by scanning electron microscopy. The optimal composite electrodeposition conditions were obtained as follows： CeO2 40 g/L and WC 20 g/L, temperature 60 ℃, and current density 25 mA/cm2. Under these conditions, a compact and uniform PbO2-WC- CeO2 composite electrode can be obtained on stainless steel substrate, featuring a exchange current density of 0.732 A/cm2 and a corrosion current density 3.924 × 10-s A/cm2.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2012年第10期1-6,共6页
Electroplating & Finishing
基金
国家自然科学基金(50964008)
关键词
不锈钢基
二氧化铅
碳化钨
氧化铈
复合镀层
电极
催化活性
stainless steel substrate
lead（IV） oxide
tungstencarbide
ceria
composite coating
electrode
catalyticactivity
