取代氰化物的热扩散法镀黄铜线  

Brass plating on steel wire by thermal diffusion method as an alternative to cyanide plating

作　　者：程沪生 

机构地区：[1]深圳市南山区珠光路塘朗雅苑6栋8C,广东深圳518000

出　　处：《电镀与涂饰》2013年第1期14-17,共4页Electroplating & Finishing

摘　　要：目前,黄铜线电镀通常是在氰化物镀液中完成。受环保法规的限制,氰化物黄铜线电镀已受到严格控制。介绍了可取代氰化物电镀的热扩散法镀黄铜线工艺:钢丝经高温处理后进行化学酸洗和电解酸洗,然后依次进行焦磷酸镀铜和酸性镀铜,再进行硫酸盐镀锌,使镀层中铜、锌含量比为73∶27;最后在420～450℃的热扩散轮子上进行热扩散,使铜、锌原子互相扩散到对方晶格中,形成铜–锌合金镀层。该工艺简单易行,便于管理,污水处理方便,实现了环保电镀。Currently the plating of brass on the surface of steel wire is usually carried out in a cyanide bath. However, the cyanide brass plating is limited by environment protection law and regulation. In the paper, a process for forming brass on steel wire surface by thermal diffusion method as an alternative to cyanide plating was introduced： （a） chemical pickling and electrolytic pickling of steel wire treated at high temperature; （b） pyrophosphate copper plating, acidic copper plating, and sulfate zinc plating successively, making the content ratio of copper to zinc in deposit equal to 73：27; and （c） interdiffusion of Cu and Zn atoms to opposite crystal lattice by heating at 420-450 ℃ on thermal diffusion wheel to form Cu-Zn alloy coating. The process is simple and easy, and convenient for management and wastewater treatment, thus achieving the goal of environmentally-friendly electroplating.

关 键 词：钢丝 镀黄铜 铜—锌合金 无氰电镀 热扩散 

分 类 号：TQ153.2[化学工程—电化学工业]