The influence of incorporation of Mn on the pitting corrosion performance of CrFeCoNi High Entropy Alloy at different temperatures

Authors

H. Torbati-Sarraf, Clemson University
Mitra Shabani, Clemson University
Paul D. Jablonski, National Energy Technology Laboratory
Garrett J. Pataky, Clemson University
A. Poursaee, Clemson University

Document Type

Article

Publication Date

8-2019

Publication Title

Materials & Design

Volume

184

Publisher

Elsevier

DOI

https://doi.org/10.1016/j.matdes.2019.108170

Abstract

The electrochemical behavior and susceptibility to pitting corrosion of CrFeCoNi and CrMnFeCoNi high entropy alloys were studied in a 0.1 M NaCl solution at temperatures ranging from 25 to 75 °C. Electrochemical measurements revealed that CrMnFeCoNi is more susceptible to oxide film breakdown and localized corrosion compared to CrFeCoNi. Post corrosion microscopic observations showed severe pitting corrosion for CrMnFeCoNi in higher temperatures compared to CrFeCoNi. Based on in-depth XPS profile measurements on the remaining oxide films, this behavior was attributed to the depletion of Cr in the oxide film and detrimental presence of Mn in the matrix solid solution of CrMnFeCoNi.

Comments

https://creativecommons.org/licenses/by-nc-nd/4.0/

Recommended Citation

H. Torbati-Sarraf, Mitra Shabani, Paul D. Jablonski, Garrett J. Pataky, A. Poursaee, The influence of incorporation of Mn on the pitting corrosion performance of CrFeCoNi High Entropy Alloy at different temperatures, Materials & Design, Volume 184, 2019, 108170, ISSN 0264-1275, https://doi.org/10.1016/j.matdes.2019.108170.