摘要
采用无氰沉锌技术在高硅铝合金表面制备沉锌层。通过正交试验得到无氰沉锌的最佳工艺配方为:NiSO4·7H2O4g/L,CuSO4·5H2O2g/L,FeCl31g/L,ZnO8g/L,NaOH60g/L,配位剂25g/L,调整剂1g/L。对采用最佳配方制得的沉锌层进行了孔隙率、结合力、沉锌电位-时间曲线等测试,结果表明,沉锌层表面致密、结合力好,可替代含氰化物的沉锌工艺,用于铝轮毂电镀生产。
Zinc coating was prepared on the surface of high-silicon aluminum alloy by cyanide-free zinc dipping. The optimal dipping bath was obtained by orthogonal test as follows：NiSO4·7H2O 4 g/L,CuSO4·5H2O 2 g/L,FeCl3 1 g/L,ZnO 8 g/L,NaOH 60 g/L,complexing agent 25 g/L,and adjusting agent 1g/L. The porosity and adhesion strength of the zinc coating to aluminum substrate and the open-circuit potential vs. time curve for zinc dipping were tested. The results showed that the zinc coating obtained from the optimal zinc dipping bath is characterized with compact structure and good adhesion to the substrate,and can be used as an alternative to cyanide zinc dipping bath for electroplating of aluminum wheels.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2011年第10期33-36,共4页
Electroplating & Finishing
基金
广东省教育部产学研结合项目(2009B090300078)
广州市科技型中小企业技术创新基金项目(2009V43C141)
关键词
高硅铝合金
轮毂
无氰沉锌
结合力
high-silicon aluminum alloy
wheel
cyanide-free zinc dipping
adhesion strength
