Effect of Misch Metal on the Corrosion Behavior of AZ91 Magnesium Alloys under Wet-Dry Cycles

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	Effect of Misch Metal on the Corrosion Behavior of AZ91 Magnesium Alloys under Wet-Dry Cycles
	Zhou Weiguang 1; Jia Ruiling 1; Zhang Guilong 1; Guo Feng 1; Zhang Wei 2
刊名	RARE METAL MATERIALS AND ENGINEERING
	2017-07-01
卷号	46 期号:7 页码:1893-1899
关键词	magnesium alloys misch metal corrosion wet-dry cycles
ISSN号	1002-185X
通讯作者	Jia Ruiling(jrl014014@163.com)
英文摘要	The microstructure and element distribution of AZ91 alloy were changed by adding the mischmetal of lanthanum and cerium (La, Ce). La or Ce element can be found in various phases of AZ91 alloy with mischmetal addition. Part of them can be dissolved in the alpha-Mg solid solution, while the others formed different intermetallic compounds with chemical composition Al-4(La,Ce) or Al10Ce2Mn7. Al-4(La,Ce) is in acicular shape and Al10Ce2Mn7 is in granular shape. The fraction of beta phase in AZ91 alloy decreased obviously with the addition of mischmetal, and the distribution of Al element transferred from the grain boundaries to grain internal area. The results of the corrosion behavior of AZ91 magnesium alloys with addition of mischmetal in snow-melt agent solution under wet-dry cycles show that a shift of the corrosion potential (E-corr) towards more negative values is observed for all the alloys with mischmetal addition, but their corrosion current densities (I-corr) are much lower than that of the AZ91 alloy. The scanning electrochemical microscopy (SECM) test results reveal that the addition of mischmetal could reduce the number of electrochemical active points on the surface. In addition, the compactness of corrosion product film of magnesium alloy is increased with addition of mischmetal.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000407092900025
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/125043]
专题	金属研究所_中国科学院金属研究所
通讯作者	Jia Ruiling
作者单位	1.Inner Mongolia Univ Technol, Hohhot 010051, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhou Weiguang,Jia Ruiling,Zhang Guilong,et al. Effect of Misch Metal on the Corrosion Behavior of AZ91 Magnesium Alloys under Wet-Dry Cycles[J]. RARE METAL MATERIALS AND ENGINEERING,2017,46(7):1893-1899.
APA	Zhou Weiguang,Jia Ruiling,Zhang Guilong,Guo Feng,&Zhang Wei.(2017).Effect of Misch Metal on the Corrosion Behavior of AZ91 Magnesium Alloys under Wet-Dry Cycles.RARE METAL MATERIALS AND ENGINEERING,46(7),1893-1899.
MLA	Zhou Weiguang,et al."Effect of Misch Metal on the Corrosion Behavior of AZ91 Magnesium Alloys under Wet-Dry Cycles".RARE METAL MATERIALS AND ENGINEERING 46.7(2017):1893-1899.