【摘要】 在20钢表面电刷镀快速Ni层作为过渡层,然后采用双层辉光离子技术将Ni-Cr-Mo-Cu合金进行多元共渗,对形成的复合镀层在5％HCl溶液中进行了电化学腐蚀性能测试.利用XRD,扫描电镜以及EDX对渗层的组织结构和合金元素及碳元素在渗层中的分布进行了分析.结果表明:预先刷镀快速Ni镀层再进行双层辉光多元渗Ni-Cr-Mo-Cu的复合渗镀层的耐蚀性能明显优于双辉多元渗Ni-Cr-Mo-Cu以及单独电刷镀Ni镀层的耐蚀性能.分析认为,由于双辉多元共渗中的温度效应,使刷镀的Ni镀层与20钢基材之间互扩散,有效地降低渗镀层中的碳含量,从而使多元共渗Ni-Cr-Mo-Cu与刷镀的Ni镀层双层复合渗镀层具有较好的耐蚀性能.更多还原

【Abstract】 By the electrochemical method in 5%HC1 solution, the corrosion resistance of the composite of Ni-Cr-Mo-Cu multi-element surface alloying with electric brush plating Ni interlayer on the low carbon steel substrate has been investigated. The distributions of alloy elements and carbon element in the alloying layer have been determined by SEM and EDX, and its component phase was also studied by XRD. The results indicate that the corrosion resistance of the new type composite alloy layer is better than that of only used Ni-Cr-Mo-Cu multi-element surface alloying or electric brush plating layer. The reason is that due to the temperature effect during double glow plasma surface alloying, the Ni atoms in brush plating interlayer diffuse toward low carbon steel, which effectively eliminated the carbon in the alloying layer.更多还原