Journal
APPLIED SURFACE SCIENCE
Volume 542, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2020.148520
Keywords
High entropy alloy film; Passivation; Corrosion; XPS; TEM
Categories
Funding
- National Natural Science Foundation of China [51905524]
- National Key R&D Program of China [2018YFB2000300]
- China Postdoctoral Science Foundation [2019M652153]
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The novel VAlTiCrSi amorphous high entropy alloy (HEA) film exhibited better corrosion resistance than 304 stainless steel due to its complex composition. During the rupture process of the passive film, the interaction between Cr element and Cl ions played a major role, while other elements except Cr hindered the rupture process to some extent.
The passivation behavior of a novel VAlTiCrSi amorphous high entropy alloy (HEA) film was investigated in artificial sea-water. The passive film, mainly composed of oxidation state of V, Al, Ti, Cr and Si, was a single-layer amorphous structure with a thickness of similar to 10 nm. By combining the point-defect model theory, the more excellent corrosion-resistance of HEA film than that of 304 stainless steel, is attributed to its complex composition. During the rupture process of the passive film, the CI mainly react with Cr element, and other elements except Cr work against the rupture process in some sense.
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