Er对Al-Zn-In合金组织和电化学性能的影响  

Effect of Er on Microstructure and Electrochemical Performance of Al-Zn-In Anode

作　　者：李航[1] 魏兵[1] 许征兵[1,2] 曾建民[1,2] 陈蓉[1] 李恒[1] 陆艳艳[1] 

机构地区：[1]广西大学有色金属材料及其加工新技术教育部重点实验室,广西南宁530004 [2]广西理工科学实验中心,广西南宁530004

出　　处：《稀有金属材料与工程》2016年第7期1848-1854,共7页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51401057);广西自然科学基金(2013GXNSFBA019252);广西教育厅科研项目(2013YB011);新型铝合金材料及先进加工理论与技术系统性课题(桂科能13-051-02;13-A-02-03);"铝合金材料先进加工技术"八桂学者专项经费

摘　　要：采用SEM、EDS和XRD等方法,研究了不同Er含量对Al-Zn-In阳极合金组织的影响;在3.5%(质量分数)Na Cl溶液中测试了不同Er含量的Al-5Zn-0.03In-Er合金的极化曲线和电化学阻抗(EIS)。结果表明:随着Er含量的增加,铝合金阳极枝晶得到细化,枝晶间析出相增多,合金腐蚀电位正移,EIS谱中阻抗弧半径增大,腐蚀速度减缓。4种合金中,Al-5Zn-0.03In-1Er合金枝晶得到一定程度细化、析出相数量适中,点蚀坑较为独立,呈现均匀腐蚀的特征,可作为阳极合金材料。The effect of Er content on microstructure of Al-Zn-In alloy anodes were studied by scanning electron microscopy（SEM）,energy spectrum analysis and X-ray diffraction analysis.The polarization curves and EIS of Al-Zn-In alloy with different Er contents were tested in the 3.5wt% Na Cl solution.The results show that with the increase of Er content,the dendrite of Al-Zn-In alloy anodes is refined,the amount of inter-dendritic precipitates increases,the corrosion potential becomes more positive,the radius of electrochemical impedance spectroscopy enlarges while the corrosion rate decreases.Al-5Zn-0.03In-1Er alloy possesses refined dendrites and a proper amount of precipitates,with independent pitting and uniform corrosion,which is an ideal sacrificial alloy.

关 键 词：Al-Zn-In牺牲阳极 ER 微观组织 极化曲线 电化学阻抗 

分 类 号：TG146.21[一般工业技术—材料科学与工程]