Enhancement of the corrosion resistance of Molybdenum by La2O3 dispersion

被引：20
|
作者：
Cairang, Wande [1 ]
Li, Tianshu [2 ]
Xue, Dezhen [1 ]
Yang, Hejie [1 ]
Cheng, Pengming [1 ]
Chen, Can [1 ]
Sun, Yuanjun [1 ]
Zeng, Yi [1 ,3 ]
Ding, Xiangdong [1 ]
Sun, Jun [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[2] Ohio State Univ, Fontana Corros Ctr, Dept Mat Sci & Engn, Columbus, OH 43210 USA
[3] Jinduicheng Molybdenum Co Ltd, Xian 710077, Peoples R China
来源：
CORROSION SCIENCE | 2021年 / 186卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Molybdenum; Microstructure; Oxide film; Corrosion behavior; Rare earth doping; LOCALIZED CORROSION; ANODIC-DISSOLUTION; BEHAVIOR; ALLOYS; OXYGEN; XPS; OXIDATION; CARBON; STEEL; OXIDE;
D O I：
10.1016/j.corsci.2021.109469
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion behavior of pure Molybdenum (Mo) and Mo doped with 0.3 wt.% La2O3 was investigated in aerated 3.5 wt.% NaCl at 25 degrees C. Compared with the pure Mo, the doped Mo exhibits significantly increased corrosion resistance, with a smaller current density during anodic polarization and a 2 similar to 3 times larger charge transfer resistance. Such an enhancement originates from the refinement of grains and purification of the grain boundary due to the addition of La2O3, which facilitates the formation of a compact and protective oxide film. Our results provide a recipe to improve the corrosion resistance of Mo alloys.
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页数：15
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