摘要
随着施镀的进行,化学镀镍液中的硫酸钠和亚磷酸钠的积累越来越多,从而影响镀液的使用寿命。提出了镀液中硫酸钠和亚磷酸钠的处理方法。对于硫酸镍体系,首先将镀液冷却至室温除去过量的硫酸钠晶体,接着在常温下添加Ca(OH)2沉淀除去亚磷酸根离子;对于次磷酸镍体系,直接采用常温下Ca(OH)2沉淀除去亚磷酸根离子的方法。分别测试和对比了2种体系镀液处理前后,镀液和镀层的性能,如镀液各组分浓度、镀液的密度、镀速、镀层应力等。采用化学沉淀法延长化学镀镍液寿命是切实可行的。
Sodium sulfate and sodium phosphite are tending to be accumulated gradually in the solution during electroless nickel plating, which affect the life of the plating solution. Method used to remove sodium sulfate and sodium phosphite in the plating solution was given. For nickel sulfate system, initially crystal sodium sulfate was removed by cooling the solution down to room temperature, and subsequently HPO3^2- was precipitated and removed by addition of Ca（OH）2 at room temperature. For nickel hypophosphite system, HPO3^2- was precipitated and eliminated directly by adding Ca（OH）2 at room temperature. The performances of plating solution and the properties of the deposit for the above two systems before and after treatment were respectively determined and compared, such as concentration of each component, solution density, plating speed and deposit stress, etc. The chemical precipitation method is feasible for extending the life of electroless nickel plating solution.
出处
《电镀与涂饰》
CAS
CSCD
2006年第1期11-14,共4页
Electroplating & Finishing
关键词
化学镀镍
镀液寿命
硫酸钠
亚磷酸钠
化学沉淀法
CA(OH)2
eletroless nickel plating
bath life
sodium sul- fate
sodium phosphite
chemical precipitation method
Ca（OH）2
