摘要
采用电沉积方法在镁合金表面制备了一种环境友好型Zn过渡层.利用SEM、XRD研究了直流和脉冲电沉积方式对Zn过渡层形貌及微观结构的影响,采用电化学方法研究了Zn过渡层的耐蚀性.结果表明,Zn过渡层在镁合金表面电沉积Sn-Ni合金过程中是必不可少的.在相同的厚度下,脉冲电沉积方式的应用更有利于制备平整致密、无孔且耐蚀性高的Zn过渡层.只有以脉冲Zn为过渡层才能获得良好的后续Sn-Ni合金镀层.
In this paper,an environmental friendly Zn transition layer was prepared by electrodeposition. The effects of direct current（DC） and pulse current（PC） plating modes on morphology and microstructure of Zn transition layers were investigated by scanning electron microscopy and X-ray diffraction. The corrosion resistance of the Zn transition layers was analyzed by electrochemical method. The results showed that the Zn transition layer was essential for subsequent electroplating Sn-Ni alloy coating on magnesium alloy. For the same thickness,the application of the PC plating mode was more favorable to prepare compact,smooth,nonporous and high corrosion resistance Zn transition layers. Moreover,a Sn-Ni alloy coating could be successfully plated on the surface of PC plated Zn transition layer on magnesium alloy.
出处
《吉林师范大学学报（自然科学版）》
2014年第2期105-108,共4页
Journal of Jilin Normal University:Natural Science Edition
基金
吉林省教育厅"十二五"科技项目(吉教科字2012第172号)
关键词
镁合金
电沉积
脉冲
过渡层
耐蚀性
magnesium alloy
electrodeposition
pulse current
transition layer
corrosion resistance
