Corrosion resistant body-centered cubic VNbTa refractory medium-entropy alloy

被引：8
作者：
Han, Zhenhua [1 ]
Guo, Chenhui [1 ]
Huang, Chaodai [1 ]
Fan, Xiaoyu [1 ]
Zhang, Jinyang [2 ]
Liu, Gang [1 ]
Wang, Hongyan [3 ]
Wei, Ran [4 ]
机构：
[1] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China
[2] Xian Special Equipment Inspect Inst, Xian, Peoples R China
[3] Zhengzhou Univ Aeronaut, Sch Mat Sci & Engn, Zhengzhou 450046, Peoples R China
[4] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, 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：
Medium-entropy alloys; Corrosion behavior; XPS; Passive film; First-principles calculation; ELECTROCHEMICAL PROPERTIES; SURFACE-ANALYSIS; BEHAVIOR; TI; TA; MICROSTRUCTURE; PASSIVATION; DIFFUSION; H2SO4; NACL;
D O I：
10.1016/j.corsci.2024.111885
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion behavior of VNbTa medium-entropy alloy (MEA) was investigated by electrochemical measurement and first-principles calculation. Due to the synergism of higher bond strength and higher oxygen or OH adsorption heat among constituent elements, the MEA has better corrosion resistance than 316 L stainless steel. The stability passive film was related to the high -valent oxides (V2O5, Nb2O5, and Ta2O5). The calculation results show that VNbTa MEA has a high work function and adsorption energy for O, and the formation of initial passive film is mainly determined by the bonding of surface Ta, V atoms and O atoms.
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页数：11
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