Quantifying the influence of microstructure on the corrosion of Mg-Li alloys by using X-ray CT

被引：21
作者：
Tian, Guangyuan [1 ]
Wang, Junsheng [1 ,2 ]
Zhang, Chi [1 ]
Su, Hui [1 ]
Yan, Chengming [1 ]
Yang, Zhihao [1 ]
机构：
[1] Beijing Inst Technol, Sch Mat Sci & Engn, 5 South Zhongguancun St, Beijing 100081, Peoples R China
[2] Beijing Inst Technol, Adv Res Inst Multidisciplinary Sci, 5 South Zhongguancun St, Beijing 100081, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 229卷
基金：
中国国家自然科学基金;
关键词：
Mg -Li alloy; Corrosion; X-ray CT; SKPFM; Secondary phase; Electrochemical test; MAGNESIUM ALLOY; ELECTROCHEMICAL-BEHAVIOR; HEAT-TREATMENT; PHASE; RESISTANCE; FILM; IMPEDANCE;
D O I：
10.1016/j.corsci.2024.111848
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure of multi -component Mg -Li alloys played a decisive role in their corrosion properties due to the potential differences between the matrix and the secondary phases. In this study, the effects of secondary phases (AlLi, AlX(Gd, Y, Mn), and Mg2Sn) on the corrosion behavior of Mg -Li alloys have been quantified by using in situ X-ray CT. The microstructure -property correlation was established between the type, morphology, distribution, and dimensions of the secondary phases and the microscopic corrosion behavior. The corrosion parameters, such as average equivalent diameter, distance, number density, and volume fraction of the secondary phases and corrosion pits, were quantified as a function of corrosion time. The dominating secondary phase was identified by combining SKPFM analysis and electrochemical testing, giving quantitative information on corrosion control by designing secondary phases.
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页数：18
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