稀土Eu对化学镀Ni-B合金层的影响  

Effect of Rare Earth Eu Addition on Electroless Ni-B Alloy Coating

作　　者：张士民 陈必清 高利霞 熊彤彤 杜婵 朱云娜 ZHANG Shi-min;CHEN Bi-qing;GAO Li-xia;XIONG Tong-tong;DU Chan;ZHU Yun-na(Department of Chemistry and Chemical Engineering,Qinghai Normal University,Xining 810008,China)

机构地区：[1]青海师范大学化学化工学院,青海西宁810008

出　　处：《材料保护》2020年第5期92-95,共4页Materials Protection

基　　金：国家自然科学基金(21553002);青海基础研究计划项目(2016-ZJ-753);教育部科技项目(Z2016099)资助。

摘　　要：为改善Ni-B合金镀层的耐腐蚀性,采用化学镀技术制备了Eu-Ni-B合金镀层,并研究了在镀液中添加稀土Eu对Ni-B合金的影响。通过扫描电子显微镜、能谱仪、X射线衍射仪对镀层形貌、成分和结构进行表征;采用极化曲线技术对镀层在3.5%HCl中的耐腐蚀性进行研究,并且通过塔菲尔曲线外推法得到了相应的电化学腐蚀参数。研究结果表明:成功制备了Eu-Ni-B合金镀层,稀土Eu的添加使镀速明显上升,当稀土Eu的添加量为3.4 g/L时,镀速达到了最大值0.029 mg/(cm^2·min)。Eu-Ni-B合金镀层的腐蚀电位比Ni-B合金镀层的腐蚀电位正移20 m V,表明稀土Eu的加入,使得镀层的耐腐蚀性明显提升。In order to improve the corrosion resistance of the Ni-B alloy coating,the Eu-Ni-B alloy coating was prepared by electroless plating.The effect of adding rare earth Eu in the plating solution on the Ni-B alloy was also studied.The morphology,composition and structure of the coating were characterized by scanning electron microscopy,energy dispersive spectroscopy and X-ray diffractometry.The corrosion resistance of the coating in 3.5%HCl was studied by polarization curve technique,and the corresponding electrochemical corrosion parameters were obtained by the extrapolation of the Tafel curve.Results showed that the Eu-Ni-B alloy coating was successfully prepared,and the addition of rare earth increased the plating rate.When the addition amount of rare earth Eu was 3.4 g/L,the plating rate reached the maximum value,0.029 mg/(cm^2·min).The corrosion potential of the Eu-Ni-B alloy coating was 20 m V more than the corrosion potential of the Ni-B binary alloy coating,which indicated that the addition of rare earth Eu improved the corrosion resistance of the coating significantly.

关 键 词：Ni-B合金镀层 Eu-Ni-B合金镀层 稀土Eu 化学镀 耐腐蚀性 

分 类 号：TQ153.1[化学工程—电化学工业]