摘要
对6061铝合金化学施镀了Ni-P合金镀层。以硬度为考察指标正交优化了化学镀镍液,其优化配方为:NiSO4·6H2O 25g/L,NaH2PO2·H2O 25 g/L,CHCOONa.3H2O 20 g/L,C3H6O3(乳酸)20 g/L。探讨了十二烷基硫酸钠、温度、pH值对镀层性能的影响,研究结果表明:当质量浓度为0.5 g/L时,镀层表面几乎无针孔、结晶细致均匀;pH值增大或温度升高,镀层变亮、硬度提高但结合力下降,在pH值为4.78,70℃,施镀6 h所得镀层硬度为476.8HV,结合力良好。
Electroless Ni P alloy plating was taken on 6061 aluminum alloy. In accordance with the coatings hard hess, the orthogonal testing method was used to screen the nickel plating solution, an optimum formula of electroless Ni P was obtained, the optimized bath composition contained 25 g/L nickel sulphate hexahydrate, 25 g/L sodium hypophosphite, 20 g/L sodium acetate trihydrate, 20 g/L lactic acid. The effect of sodium dodecyl sulfate, temperature and pH on the property of the coatings were discussed. The results indicate that as the coneentrayion of the sodium dodecyl sulfate is 0.5 g/L, the porosity is less; The coating grows lighter and harder but the adhesion strength grows bad with the mcreasement of pH and temperature, when the under the condition of pH 4.78, the temperature 70℃ and plating 6 h, the hardness of the obtained coating is 476.8HV and the adhesion strength is better.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2011年第2期65-68,共4页
Surface Technology
基金
广西自然科学基金资助项目(桂自科0679011
0728215)
广西科学研究与技术开发计划项目(桂科攻063000423A)
关键词
6061铝合金前处理
化学镀
硬度
结合力
表面形貌
pretreatment of 6061 aluminum alloy
roless plating
hardness
adhesion strength
surface morphology
