环保无氰电刷镀银工艺及其实践应用

Techonology of Environment Friendly Cyanide-Free Electro-Brush Silver Plating and Its Practical Application

为满足电力系统检修工作中对供电设备修复技术的新要求,以焦磷酸钾为络合剂成功地制备出了性能优异的无氰电刷镀液,并采用电刷镀技术在铜基体材料表面制备得银镀层;通过镀层附着力试验、扫描电镜(SEM)、能谱(EDS)等方法对银镀层的结构和性能进行表征。结果表明:镀液性能稳定,经过两周的密封保存,镀液没有沉淀析出且电导率无明显变化;银镀层在铜基体上附着力良好,镀层厚度能超过20μm,达到了相关应用的要求;该电刷镀工艺能够有效修复隔离开关、导流接头、接线柱、设备线夹、刀闸触头以及三相连接板的缺陷,使修复后设备性能达到使用要求。

In order to meet the new requirements for repairing technology of power supply equipment in power system maintenance work.A cyanide-free brush plating solution with excellent performance was successfully prepared with potassium pyrophosphate as a complexing agent.And silver plating was prepared on the surface of copper as a substrate by electro-brush plating.The structure and properties of the silver plating were characterized by adhesion testing,scanning electron microscopy(SEM),energy dispersive X-ray spectroscopy(EDS).The results show that the performance of the plating solution was stable.After two weeks of sealing and preservation,the plating solution did not precipitate and the conductivity did not change significantly.The silver plating had good adhesion on the copper substrate,and the thickness of the silver plating was over 20μm,meeting the requirements of related applications.The electro-brush plating process can effectively repair defects on isolating switches,diversion joints,binding posts,equipment clamps,knife gate contacts and three-phase connection boards,making the repaired device performance meet the usage requirements.