(TiZrNbTa)90Mo10 high-entropy alloy: Electrochemical behavior and passive film characterization under exposure to Ringer’s solution

• Published in: Corrosion science Vol. 167; p. 108513
• Main Authors: Song, Qian-Ting, Xu, Jian
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Ltd 01.05.2020; Elsevier BV
• Subjects: A. High-entropy alloys; A. Refractory metals; A. Simulated physiological medium; C. Corrosion; C. Passive films; Corrosion resistance; Corrosion resistant alloys; Electrochemical analysis; Exposure; High entropy alloys; Surface layers; X ray photoelectron spectroscopy; A. Simulated physiological medium; A. High-entropy alloys; C. Corrosion; A. Refractory metals; C. Passive films
• ISSN: 0010-938X; 1879-0496
• DOI: 10.1016/j.corsci.2020.108513

[Display omitted] •(TiZrNbTa)90Mo10 HEA exposed to Ringer’s solution was investigated.•Protectiveness of passive film on alloy was deteriorated when pH ≤ 1 of solution.•Passive film formed on exposed surface consists of multiple species oxides.•HEA exhibits robust corrosion resistance comparative to that of Ta and Ti. By characterizing electrochemical properties and oxide species on the surface layer with XPS analysis, the corrosion behavior of (TiZrNbTa)90Mo10 high entropy alloy (HEA) was investigated under exposure to Ringer’s solutions. The protectiveness of passive film formed on the alloy was deteriorated when the exposure solution became more acidic. Under exposure in neutral solution, passive film spontaneously formed on exposed surface consists of multiple species oxides. In comparison with constituting pure metals in the alloy, the HEA exhibits robust corrosion resistance in Ringer’s solution.