Effects of lanthanum addition on corrosion resistance of hot-dipped galvalume coating

被引：0

作者：

杨栋 ^{[1
]}

陈建设 ^{[1
]}

韩庆 ^{[1
]}

刘奎仁 ^{[1
]}

机构：

[1] School of Materials and Metallurgy, Northeastern University

来源：

JournalofRareEarths | 2009年 / 27卷 / 01期

关键词：

lanthanum; galvalume coating; weight loss; weak polarization curves; electrochemical impedance spectroscopy; rare earths;

D O I：

暂无

中图分类号：

TG174.4 [金属表面防护技术];

学科分类号：

080503 ;

摘要：

Effects of La addition on corrosion resistance of hot-dipped galvalume coating steel wire were investigated.The corrosion resistance of Zn-Al-Si-La alloy coatings containing 0, 0.02wt.%, 0.05wt.%, 0.1wt.% and 0.2wt.% La were evaluated by various tests such as copper-accelerated acetic acid salt spray testing(CASS), immersion test in 3.5% NaCl solution, electrochemical tests including weak polarization curves and electrochemical impedance spectroscopy(EIS) tests, scanning electron microscope(SEM) test and X-ray diffraction(XRD) test.It was found that the corrosion resistance of galvalume coating could be improved by adding proper amounts of La.Meanwhile, the mechanism of the improvement of corrosion resistance by La addition was discussed.

引用

页码：114 / 118

页数：5