镁合金化学镀Ni-P工艺的优化设计

Process optimization of electroless Ni-P plating on magnesium alloy

采用正交试验和方差分析的方法,结合性能检测和组织分析,优化了AZ31镁合金表面化学镀Ni-P工艺。试验结果表明:影响镀层质量因素的主次顺序为:镀液的PH值、时间、温度。获得良好镀层的最佳工艺规范为:PH值5.5,35℃时处理28 min。最优工程平均为85,变动范围的置信区间为(78.8,91.2)。

The process of chemical plating Ni - P on AZ31 magnesium alloy was optimized by the orthogonal experiment, variance analysis, properties examination and microstructure analysis. The results show that the PH value of plating solution, chemical plating time and temperature are the primary factors which have influence on the quality of plating layer. Moreover, the influence degree of the three factors decreases as the above - mentioned or- der. The good plating coating is obtained when the ph value, plating temperature and time are 5.5, 35℃ and 28 min, respectively. The optimal engineering average is 85, and the corresponding confidence interval of variation range is （78.8,91.2）.