摘要
采用伏安法测量镍盘电极在铬酸钝化液中的阴极极化曲线。本方法是先测定钝化液硫酸和硝酸存在时阴极极化的总电流峰值，然后加入适当过量的碳酸钡，使溶液中的ＳＯ２４离子完全沉淀，再测定此时阴极极化的电流峰值。由于电流峰值与硝酸、硫酸浓度是线性关系，从而分别测得硝酸和硫酸的浓度。
Voltammetric determination of nickel disk cathodic polarization curve in chromating bath is presented. In the determination, the first measurement of the total peak current on polarization curve is taken in the bath containing H2SO4 and HNO3 and the second measurement of the same is taken after SO24-ion is completely precipitated by adding appropriate excessive amount of BaCO3 The peak current measured exhibits a linear relationship with concerntration of H2SO4 and HNO3 respectively.
出处
《电镀与涂饰》
CAS
CSCD
1995年第4期15-17,20,共4页
Electroplating & Finishing
关键词
伏安法
铬酸
钝化液
硝酸
硫酸
阳极氧化
chemical analysis, voltammetry, polarization curve, chromating bath,sulfuric acid, nitric acid.
