Ni-P-SiC复合镀层性能的研究

摘要

以AZ31B镁合金为基材,在碱性环境下化学镀Ni-P-SiC.通过正交试验得到最佳的配方及工艺条件为:氟化铵60.0 g/L,柠檬酸三钠75.0 g/L,碘化钾0.06 g/L,SiC 6.0 g/L,硫酸镍24.0 g/L,次磷酸钠18.0 g/L,十二烷基苯磺酸钠0.06 g/L,pH值8.5,85℃,1h.在此工艺条件下,得到结合力强、表面平整、组织致密、具有较强耐蚀性和耐磨性的Ni-P-SiC复合镀层.%AZ31B magnesium alloy was used as the base material,and electroless plating of NiP-SiC was conducted under the alkalinity environment.The optimum formula and process conditions determined through orthogonal experiment were as follows:NH4F 60.0 g/L,Na3C6H5O7 · 2H2O 75.0 g/L,KI 0.06 g/L,SiC 6.0 g/L,NiSO4 · 6H2O 24.0 g/L,NaH2PO2 ·H2O 18.0 g/L,Cl8H29NaO3S 0.06 g/L,pH value 8.5,temperature 85 ℃,time 1 h.Under these conditions,the prepared Ni-P-SiC composite coating adhere well to the substrate and possess dense surface and compact structure,which resulting in better corrosion resistance and wear resistance.