(1. 浙江工业大学 化学与材料工程学院, 杭州 310014;
2.浙江大学 化学系, 杭州 310027)
摘 要: 采用线性电位扫描法对铅、 镉二元合金共沉积中适用的添加剂进行了筛选, 研究了不同种类添加剂对铅、 镉电沉积的影响, 并分析讨论了添加剂的作用。通过对合金镀层中铅、 镉元素含量的测定和合金镀层对应的阳极溶出极化曲线的测试和分析, 证明了合金镀层中的铅、 镉是一种单金属混合物。 研究结果表明, 采用本合金电沉积技术可获得镀层性能良好的、不同镉含量的铅、 镉二元合金镀层。
关键字: 铅; 镉; 合金电沉积; 添加剂
lead-cadmium alloy
(1. College of Chemistry and Materials Engineering,
Zhejiang University of Technology, Hangzhou 310014, China;
2. Department of Chemistry, Zhejiang University, Hangzhou 310027, China)
Abstract:The electrodeposition of lead-cadmium alloy in aminosulfate bath was studied. The additives suitable for lead-cadmium electrodeposition were chosen by the method of linear potential sweep electrochemical technique. The effect of additives on the electrodepositions of lead, cadmium and lead-cadmium alloy were analyzed. The mechanism of the function of additives was also discussed. The phase composition in the Pb-Cd alloy is detected by electrochemical anodic dissolution and it is confirmed that both lead and cadmium exist in the form of mechanically single metal phase (not solid solution ). It is concluded that this technique can be used for the preparation of lead-cadmium alloy plating which contains different content of cadmium.
Key words: lead; cadmium; alloy electrodeposition; additive