Process optimization of electroless Ni-P plating on magnesium alloy

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 order.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).