Effects of Trace Erbium on Corrosion Resistance of Al-Zn-Mg Alloy

Wang Xudong; Nie Zuoren; Lin Shuangping; Su Xuekuan; Xing Zebing

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Effects of Trace Erbium on Corrosion Resistance of Al-Zn-Mg Alloy
Vol. 29, Issue 1, Pages: 76-78(2009)
Published： 2009 ，
DOI：

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[1]王旭东,聂祚仁,林双平,苏学宽,邢泽炳.Er对Al-Zn-Mg-Cu合金抗腐蚀性能的影响[J].特种铸造及有色合金,2009,29(01):76-78+1.

Wang Xudong, Nie Zuoren, Lin Shuangping, et al. Effects of Trace Erbium on Corrosion Resistance of Al-Zn-Mg Alloy. [J]. Special Casting & Nonferrous Alloys 29(1):76-78(2009)
[1]王旭东,聂祚仁,林双平,苏学宽,邢泽炳.Er对Al-Zn-Mg-Cu合金抗腐蚀性能的影响[J].特种铸造及有色合金,2009,29(01):76-78+1. DOI：

Wang Xudong, Nie Zuoren, Lin Shuangping, et al. Effects of Trace Erbium on Corrosion Resistance of Al-Zn-Mg Alloy. [J]. Special Casting & Nonferrous Alloys 29(1):76-78(2009) DOI：

摘要

采用晶间腐蚀和应力腐蚀的试验方法

研究了Al-Zn-Mg-Cu合金中添加Er后的抗晶间腐蚀和应力腐蚀性能

利用金相显微镜和扫描电镜观察了合金的显微组织。结果表明

微量的Er可以明显改善合金的抗晶间腐蚀和应力腐蚀性能

但是

当Er含量达到0.4%时

耐蚀性能反而会有所下降。

Abstract

Intergranular corrosion and stress corrosion cracking resistance of Al-Zn-Mg-Cu alloy with trace Er addition were examined by means of stress corrosion cracking and intergranular corrosion testing from GB-T7998-2005 and HB5254-83

and microstructure of the alloy was observed by OM （optical microscope） and SEM （scanning electron microscope）. The results indicate that trace Er addition can greatly improve intergranular corrosion and stress corrosion cracking resistance of the alloy

however

with more than 0.4% Er addition

stress corrosion cracking resistance will be descended.