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Influence of microstructure of CoCrNi medium entropy alloy on its corrosion behavior

Junyu Shi (College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha University of Science and Technology, Changsha, China)
Shengli Ling (College of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha, China)
Yinjie Kuang (College of Chemistry and Chemical Engineering, Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha University of Science and Technology, Changsha, China)
Yonggang Tong (College of Automotive and Mechanical Engineering, Changsha University of Science and Technology, Changsha, China)
Yongle Hu (College of Automobile and Mechanical Engineering, Changsha University of Science and Technology – Yuntang Campus, Changsha, China)
Dunying Deng (College of Material Science and Engineering, Changsha University of Science and Technology – Yuntang Campus, Changsha, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 27 October 2023

Issue publication date: 20 November 2023

112

Abstract

Purpose

The purpose of this paper is to reveal the effect of microstructure on the corrosion behavior of CoCrNi alloy in 3.5 Wt.% NaCl solution.

Design/methodology/approach

The as-cast CoCrNi alloy was prepared by arc melting, and the cold-rolled and annealed alloys were prepared by processing the as-cast alloy.

Findings

The experimental results showed that a protective passivation film was formed on the surfaces of these CoCrNi MEA, and the stability and compactness of alloys increased in the sequence of cold-rolled, as-cast and annealed CoCrNi alloys. The annealed CoCrNi alloys had the best pitting resistance.

Originality/value

This study proposes the effect of the microstructure of CoCrNi alloy on corrosion resistance.

Keywords

Acknowledgements

Junyu Shi and Shengli Ling contributed equally to this work. This work was supported by National Natural Science Foundation of China (No. 92166105 and 52005053), High-Tech Industry Science and Technology Innovation Leading Program of Hunan Province (No. 2020GK2085), Hunan Youth Science and Technology Innovation Talent Project (2021RC3096) and Open fund of Key Laboratory of New Processing Technology for Nonferrous Metal and Materials Ministry of Education (No. 20KF-24).

Citation

Shi, J., Ling, S., Kuang, Y., Tong, Y., Hu, Y. and Deng, D. (2023), "Influence of microstructure of CoCrNi medium entropy alloy on its corrosion behavior", Anti-Corrosion Methods and Materials, Vol. 70 No. 6, pp. 438-448. https://doi.org/10.1108/ACMM-06-2023-2840

Publisher

:

Emerald Publishing Limited

Copyright © 2023, Emerald Publishing Limited

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