Tailoring the microstructure and enhancing the corrosion resistance of extruded dilute Mg-0.6Al-0.5Mn-0.25Ca alloy by adding trace Ce

被引：45
作者：
Li, Mei-Xuan [1 ,2 ,3 ,4 ]
Wang, Cheng [1 ,2 ,3 ,4 ]
Li, Yi-Jia [1 ,2 ,3 ,4 ]
Wang, Da-Wei [1 ,2 ,3 ,4 ]
Zha, Min [1 ,2 ,3 ,4 ]
Gao, Yipeng [1 ,2 ,3 ,4 ]
Wang, Hui-Yuan [1 ,2 ,3 ,4 ]
机构：
[1] Jilin Univ, State Key Lab Automot Simulat & Control, Changchun 130012, Peoples R China
[2] Jilin Univ, Key Lab Automobile Mat, Minist Educ, Nanling Campus,5988 Renmin St, Changchun 130025, Peoples R China
[3] Jilin Univ, Sch Mat Sci & Engn, Nanling Campus,5988 Renmin St, Changchun 130025, Peoples R China
[4] Jilin Univ, Int Ctr Future Sci, Changchun 130012, Peoples R China
来源：
CORROSION SCIENCE | 2022年 / 207卷
关键词：
Magnesium; Alloy; Intermetallics; Rare earth elements; Weight loss; Pitting corrosion; SCANNING KELVIN PROBE; IN-VITRO CORROSION; MAGNESIUM ALLOYS; MECHANICAL-PROPERTIES; ELECTROCHEMICAL-BEHAVIOR; FORCE MICROSCOPY; Y ADDITION; MN ALLOY; PART II; MG;
D O I：
10.1016/j.corsci.2022.110605
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of trace Ce addition on the microstructure evolution and corrosion behavior of dilute Mg-0.6Al-0.5Mn-0.25Ca-xCe (x = 0.1-0.3 wt%) alloys were investigated using immersion tests and electrochemical measure-ments. The Ce addition caused the formation of Al8Mn4Ce and Al11Ce3, which were less noble than Al8Mn5. Strikingly, the alloy containing 0.3 wt% Ce exhibited the lowest average corrosion rate of 4.13 mm y(-1), which was 6.5 times lower than that of Ce-free alloy. The outstanding anti-corrosion properties were attributed to the low potential difference between Ce-containing phases and matrix, the compact composite oxide film (MgO-CeO2-Al2O3), and the enrichment of Fe in Ce-containing phases.
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页数：20
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