摘要
通过正交试验方法,采用新的添加剂和配位剂实现了锌镍合金电镀,优选出了新的锌镍合金电沉积工艺和镀液配方。通过GDA-750型辉光放电光谱仪、HitachiS-570型扫描电镜等分析手段,研究了不同电镀工艺参数对镀层中镍含量、镀层厚度和镀层外观的影响规律。采用了电化学试验法研究了镍含量变化对镀层的耐腐蚀性的影响。结果表明:通过此新型的镀液配方和工艺条件,可获得含镍9%～13%、具有良好外观和耐蚀性好的锌镍合金镀层。随着电流密度的增加,镀层中镍含量先减小后增加;随着温度和pH值的增加,镀层中镍含量在不断增加;镀层的自腐蚀电位随着镍含量的增加,呈现先变正后变负的趋势,镍的含量为12%～13%时,合金的自腐蚀电位最正。
The electroplating of zinc-nickel alloy coating was realized using novel additives and-complexing agents.The optimized electroplating process and bath formulation were determined making use of orthogonal tests.A glow discharge spectrometer(GDA-750) and a scanning electron microscope(Hitachi S-S70 SEM) were used to investigate the effects of the electroplating processing parameters on the Ni content,thickness,and appearance of the Zn-Ni alloy coating.Moreover,the effect of Ni content on the corrosion resistance of the Zn-Ni alloy coating was examined via electrochemical test.Results showed that it was feasible to prepare Zn-Ni alloy coating with good appearance quality and corrosion resistance using the novel bath formulation and electroplating process conditions,and the resulting alloy coating had a Ni content of 9%-13%(atomic fraction).The content of Ni decreased initially but increased later with increasing current density,and it continuously increased with increasing temperature and pH value of the electroplating solution.Moreover,the corrosion potential of the-Zn-Ni alloy coating tended to vary positively and then negatively with increasing Ni content,while the coating with a Ni content of 12%-13% had the largest positive corrosion potential.
出处
《材料保护》
CAS
CSCD
北大核心
2008年第1期28-30,共3页
Materials Protection
关键词
电镀
锌镍合金
电流密度
性能
electroplating
Zn-Ni alloy
current density
properties
