Effect of neodymium on microstructure and corrosion resistance of AZ91 magnesium alloy

被引：0
|
作者：
Y. L. Song
Yao Hui Liu
S. R. Yu
X. Y. Zhu
S. H. Wang
机构：
[1] Jilin University,Key Laboratory of Automobile Materials of Ministry of Education and Department of Materials Science & Engineering
来源：
Journal of Materials Science | 2007年 / 42卷
关键词：
Corrosion Resistance; Corrosion Rate; Magnesium Alloy; Nd2O3; AZ91 Alloy;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The corrosion behavior of a new Mg–9Al–1Zn (AZ91) magnesium alloy containing neodymium (Nd) is investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), immersion tests and electrochemical experiments. The results indicate that Nd decreases the size and volume fraction of the β (Mg17Al12) phase and forms Al2Nd in the alloy. In addition, during corrosion, Nd is incorporated into corrosion film in the form of Nd2O3. AZ91 alloy containing 1.0 wt.% Nd possesses an outstanding passivation property and excellent corrosion resistance. The corrosion resistance enhancement is attributed to the reduction in the size and volume fraction of the β phase and the incorporation of Nd2O3 in the corrosion film.
引用
收藏
页码：4435 / 4440
页数：5
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