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Effect of Misch Metal on the Corrosion Behavior of AZ91 Magnesium Alloys under Wet-Dry Cycles
Zhou Weiguang1; Jia Ruiling1; Zhang Guilong1; Guo Feng1; Zhang Wei2
Corresponding AuthorJia Ruiling(jrl014014@163.com)
2017-07-01
Source PublicationRARE METAL MATERIALS AND ENGINEERING
ISSN1002-185X
Volume46Issue:7Pages:1893-1899
AbstractThe 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.
Keywordmagnesium alloys misch metal corrosion wet-dry cycles
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000407092900025
PublisherNORTHWEST INST NONFERROUS METAL RESEARCH
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/125044
Collection中国科学院金属研究所
Corresponding AuthorJia Ruiling
Affiliation1.Inner Mongolia Univ Technol, Hohhot 010051, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
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.
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