采用电沉积方法从碱性镀液中制备γ相Zn-Ni合金镀层,应用扫描电子显微镜、X-射线衍射仪、电化学测量技术对Zn-Ni合金镀层的微观结构和耐蚀性能进行了研究.结果表明,Ni-Zn合金镀层的腐蚀性与其微结构密切相关.Zn-Ni合金镀层的晶型为γ相,合金镀层中镍和锌的质量分数分别为15.98％和84.02％;锌-镍合金镀层中原子堆积方式为正四面体形.在5％氯化钠溶液中,γ相Zn-Ni合金镀层与锌镀层的电化学测试结果表明,在0-10Hz低频率区,γ-相Zn-Ni合金镀层的交流阻抗谱的实部值为镀锌层的7.2倍;腐蚀电位比锌层增加了0.1279V,镀锌层的Lo.是γ相Zn-Ni合金镀层的5.78倍.
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