The influence of duplex-phase structure evolution and second phase on corrosion behavior of Mg-Li-Zn-Y alloys

被引：1
作者：
Cao, Xin [1 ]
Sun, Beibei [2 ]
Zhong, Feng [1 ]
Wang, Tao [1 ]
Pi, Lin [1 ]
Zhang, Jiaxin [1 ]
Cheng, Xu [1 ]
Liang, Ming [1 ]
Li, Jianfeng [1 ]
机构：
[1] Northwest Inst Nonferrous Met Res, Xian 710016, Peoples R China
[2] Xian Univ Technol, Xian 710048, Peoples R China
来源：
MATERIALS TODAY CHEMISTRY | 2025年 / 43卷
基金：
中国国家自然科学基金;
关键词：
Mg-Li alloy; Duplex phase structure; Rolling; KPFM; Anodic dissolution; MECHANICAL-PROPERTIES; LOCALIZED CORROSION; RESISTANCE; MAGNESIUM; OXIDATION; CHLORIDE; XPS;
D O I：
10.1016/j.mtchem.2024.102487
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this work, the influence of duplex phase evolution of Mg-xLi-6Zn-2Y alloy regulated by Li micro-alloying before and after rolling deformation on corrosion behavior was investigated. The increase in Li content leads to a typical transformation of the duplex phase structure in the as-cast Mg-Li-Zn-Y alloys, and accompanied by the precipitation of the W-phase and MgLiZn phases. These second phase particles had higher potential than alpha-Mg and beta-Li matrix, thereby inducing the micro-galvanic corrosion of adjacent matrix. However, the corrosion resistance of as-cast alloy was significantly improved after rolling treatment, primarily attributed to the reduction of local cathode/anode ratio by grain refinement and fragmentation of the second phase, as well the corrosion products films composed of Y2O3 and Zn (OH)2 providing protection for the matrix.
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页数：12
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