目的 提高镁合金的耐磨性、耐蚀性,扩大其应用领域.方法 采用“磷酸+钼酸铵酸洗→HF活化”的方法进行前处理,直接在AZ91D镁合金表面化学镀Ni-P合金镀层和Ni-P-SiC复合镀层.对两种镀层的表面和截面形貌、成分、结构、硬度、耐蚀性及耐磨性进行了系统比较.结果 在Ni-P合金镀层中引入SiC粉末后,镀层的胞状颗粒细化,硬度提高至643HV,但其腐蚀电流密度有所增大.结论 与Ni-P合金镀层相比,Ni-P-SiC复合镀层的耐蚀性有所下降,但耐磨性能大大提高.
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