The Effect of Temperature on the Electroless Ni-W-P Ternary Alloys Plating on the Aluminum Alloy

In the chemical plating,the temperature of plating bath in the plating process not only affects the deposition but also has a direct impact on the component and performance of plating.The effect of temperature of plating bath on microstructure,phase composition,depositing velocity and hardness of electroless Ni-W-P plating were changed by XRD、SEM、DTA and so on.The results show that the substrate is covered of Ni-W-P plating completely,the surface is composed of uniform crystalline grains,the contents of W is about 9.60% and no obvious defects,the diameter of grains is about 7μm,the hardness is reach to HV 610and deposition rate is 11μm/h.