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Unusually high corrosion resistance in MoxCrNiCo medium entropy alloy enhanced by acidity in aqueous solution
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- Shuang, S. (författare)
- City Univ Hong Kong, Coll Engn, Dept Mech Engn, Kowloon Tong,Kowloon, Hong Kong, Peoples R China.
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- Lyu, G. J. (författare)
- Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.;Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China.
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- Chung, D. (författare)
- City Univ Hong Kong, Coll Engn, Dept Mech Engn, Kowloon Tong,Kowloon, Hong Kong, Peoples R China.
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- City Univ Hong Kong, Coll Engn, Dept Mech Engn, Kowloon Tong,Kowloon, Hong Kong, Peoples R China Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.;Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101408, Peoples R China. (creator_code:org_t)
- Elsevier BV, 2023
- 2023
- Engelska.
- Ingår i: Journal of Materials Science & Technology. - : Elsevier BV. - 1005-0302. ; 139, s. 59-68
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- High corrosion resistance of alloys is essential for their structural applications; however, most alloys suffer from degradation of their corrosion resistance with the increasing acidity of their surround-ings. Nonetheless, we developed a series of medium-entropy alloys (MEAs) in this work, which ex-hibit high strength, superior fracture toughness and ultra-high corrosion resistance, outperforming the variety of corrosion resistant alloys hitherto reported. Most interestingly, our MEAs exhibit an unusual anti-corrosion behavior and their corrosion resistance increases with acidity in Cl- containing solutions. Through extensive thermodynamic calculations, density functional theory (DFT) simulations and experi-ments, we reveal that the unusual anti-corrosion behavior of our MEAs can be attributed to their surface chemical complexity, which facilitates the physio-chemical-absorption of H2O and O 2 and thus the rapid formation of metastable medium entropy passive films that contain the lowest amount of defects, as compared to the passive films on conventional alloys reported in the literature.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Korrosionsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Corrosion Engineering (hsv//eng)
Nyckelord
- Corrosion
- Passivation
- Alloy design
- Multi-principal element alloys
- Medium-entropy alloys
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- Shuang, S.
- Lyu, G. J.
- Chung, D.
- Wang, X. Z.
- Gao, X.
- Mao, Huahai, 197 ...
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- Li, W. P.
- He, Q. F.
- Guo, B. S.
- Zhong, X. Y.
- Wang, Y. J.
- Yang, Y.
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