Corrosion and passive behaviors of the Co-Cr-Fe-Ni-Nb eutectic high-entropy alloys in different electrolyte solutions
Source abstract
Abstract
The corrosion and passive behaviors of CoCrFeNiNb x (x = 0.3, 0.45, 0.6) high-entropy alloys with eutectic microstructures were studied in different electrolyte solutions (0.6 M NaCl, 0.6 M Na 2SO 4, and 0.6 M H 2SO 4). The potentiodynamic polarisation test showed that the pitting potential of Nb0.45 alloy reached 1.084V, and the alloy had the best corrosion resistance in Na 2SO 4 solution. Mott Schottky tests and X-ray photoelectron spectroscopy tests on the Nb0.45 alloy, and it was found that different film forming mechanisms in neutral and acidic solutions. A double-layer passivation film mainly composed of Cr(OH) 3, Cr 2O 3, and Nb 2O 5 was formed. These studies provide basic theoretical reference for the preparation of new corrosion resistant high-entropy alloys.
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Research context
OpenAlex topics: High Entropy Alloys Studies · High-Temperature Coating Behaviors · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (100+)
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