Passivation behavior of VAlTiCrSi amorphous high-entropy alloy film with a high corrosion-resistance in artificial sea water

摘要

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.