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

doi:10.1016/j.corsci.2023.111442

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 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 language	English
Article number	111442
Journal	Corrosion Science
Volume	223
DOIs	https://doi.org/10.1016/j.corsci.2023.111442
Publication status	Published - 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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10.1016/j.corsci.2023.111442

Cite this

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

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.",

keywords = "Acid corrosion, Medium-entropy alloy, Passive film, X-ray photoelectron spectroscopy",

author = "Hyun Chung and Gukhyun Lim and Seungjin Nam and Cho, \{Hoon Hwe\} and Jihyun Hong and Sohn, \{Seok Su\}",

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: {\textcopyright} 2023 Elsevier Ltd",

year = "2023",

month = oct,

doi = "10.1016/j.corsci.2023.111442",

language = "English",

volume = "223",

journal = "Corrosion Science",

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publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Optimizing strength-corrosion properties in sulfuric acid environment via tailoring V–Cr composition in medium-entropy VCrCoNi alloys

AU - Chung, Hyun

AU - Lim, Gukhyun

AU - Nam, Seungjin

AU - Cho, Hoon Hwe

AU - Hong, Jihyun

AU - Sohn, Seok Su

N1 - 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

PY - 2023/10

Y1 - 2023/10

N2 - 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.

AB - 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.

KW - Acid corrosion

KW - Medium-entropy alloy

KW - Passive film

KW - X-ray photoelectron spectroscopy

UR - https://www.scopus.com/pages/publications/85169893145

U2 - 10.1016/j.corsci.2023.111442

DO - 10.1016/j.corsci.2023.111442

M3 - Article

AN - SCOPUS:85169893145

SN - 0010-938X

VL - 223

JO - Corrosion Science

JF - Corrosion Science

M1 - 111442

ER -

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

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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