Zn-Ni合金镀层作为优良的钢铁防护性镀层,具有良好的耐蚀性,可替代镉镀层.采用极化曲线(Tafel)、电化学噪声(EN)和电化学交流阴抗谱(EIS)等电化学方法,检测和评价了直流电沉积(DC)、单脉冲电沉积(PC)和周期换向脉冲电沉积(PRC)下制备的Zn-Ni合金镀层的耐蚀性.所选用的试样具有相同镍含量.结果表明,周期换向脉冲电沉积制备的Zn-Ni合金镀层耐蚀性能最佳,单脉冲电沉积制备的Zn-Ni合金镀层的耐蚀性优于直流电沉积制备的Zn-Ni合金镀层.
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