Optimizing strength-corrosion properties in sulfuric acid environment via tailoring V–Cr composition in medium-entropy VCrCoNi alloys

Hyun Chung, Gukhyun Lim, Seungjin Nam, Hoon Hwe Cho, Jihyun Hong, Seok Su Sohn

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The corrosion resistance of VCrCoNi medium-entropy alloys in a 0.5 M H2SO4 solution was investigated by tailoring V and Cr compositions while minimizing microstructural differences. The elemental effects were discussed regarding the formation of the passive film and its subsequent impact on corrosion resistance. The results revealed that an increase in the Cr/V ratio enhances the corrosion resistance by forming a Cr-enriched passive film. However, the elevated ratio negatively affects the mechanical strength, wherein V plays a crucial role. The optimal balance between mechanical strength and corrosion resistance was discussed based on electrochemical measurements and immersion test results.

Original languageEnglish
Article number111442
JournalCorrosion Science
Volume223
DOIs
Publication statusPublished - 2023 Oct

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea grant funded by the Korea government (MSIT) [ NRF-2022R1A5A1030054 ; NRF-2023M3H4A6A01058096 ; NRF- 2018R1A5A1025224 ].

Publisher Copyright:
© 2023 Elsevier Ltd

Keywords

  • Acid corrosion
  • Medium-entropy alloy
  • Passive film
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • General Materials Science

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