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在硫酸盐-柠檬酸钠体系中脉冲电镀Zn-Ni-Mn合金镀层。采用扫描电镜、辉光放电光谱仪研究了主盐浓度比及柠檬酸钠含量对Zn-Ni-Mn合金镀层表面形貌、镀层中各元素含量及沉积速率的影响,并采用Tafel曲线法研究了镀层的耐蚀性。结果表明,主盐摩尔浓度比C_(Zn)~(2+)∶C_(Ni)~(2+)∶C_(Mn)~(2+)为3∶2∶7,柠檬酸钠含量为0.6 mol/L时能够得到晶粒细小、均匀、致密,锰含量与沉积速率相对较高的镀层,并表现出优异的耐腐蚀性能。
Pulse plating Zn-Ni-Mn alloy coating in sulfate-sodium citrate system. The effects of main salt concentration ratio and sodium citrate content on the morphology of Zn-Ni-Mn alloy coating, the content of each element and the deposition rate of Zn-Ni-Mn alloy coating were studied by scanning electron microscopy and glow discharge spectrometer. Corrosion resistance. The results showed that the molar ratio of main salt was 3: 2: 7, the content of sodium citrate was 0.6 mol / L can be fine grain, uniform, dense, relatively high manganese content and deposition rate of the coating, and showed excellent corrosion resistance.