Effect of nitric acid concentration on corrosion behavior of CrFeCoNi high entropy alloy

被引：0
|
作者：
Han, Feng [1 ]
Li, Chunyang [1 ]
Huang, Jiqiang [1 ]
Wang, Jiacai [1 ]
Xia, Chaobo [2 ]
Xue, Long [1 ]
Wang, Caimei [1 ]
机构：
[1] Beijing Inst Petrochem Technol, Sch Mech Engn, Beijing 102617, Peoples R China
[2] Zhejiang Univ Technol, Coll Civil Engn, Hangzhou 310023, Peoples R China
来源：
MATERIALS TODAY COMMUNICATIONS | 2024年 / 41卷
基金：
中国国家自然科学基金;
关键词：
High entropy alloy; Corrosion property; Passive film; XPS; AUSTENITIC STAINLESS-STEELS; PASSIVATION BEHAVIOR; CHLORIDE; TEMPERATURE; FILMS;
D O I：
10.1016/j.mtcomm.2024.110779
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
CrFeCoNi high entropy alloy (HEA) was prepared by the method of vacuum melting. Its corrosion behavior in HNO3 solution with different concentrations was studied. The electrochemical test results indicated that the corrosion resistance firstly increased with increasing HNO3 concentration from 0.1 M to 4 M, and then decreased with further increasing HNO3 concentration to 6 M. The CrFeCoNi HEA exhibited the best corrosion resistance in 4 M HNO3 solution. The discrepancy of corrosion property in different concentration of HNO3 solutions could be attributed to the different protection of passive film formed on HEA. XPS results indicated that the content of Cr2O3 in the passive film initially increased with increasing HNO3 concentration from 0.1 M to 4 M, and then decreased with further increasing HNO3 concentration to 6 M. Higher content of Cr2O3 in the passive film was responsible for better corrosion property.
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页数：10
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