Unraveling the Excellent High-Temperature Oxidation Behavior of FeNiCuAl-Based Alloy

Wu, Guangxin; Li, Gaosheng; Wei, Lijun; Chen, Hao; Wang, Yujie; Qiao, Yunze; Hua, Yu; Shi, Chenyang; Huang, Yingde; Yang, Wenjie

doi:10.3390/ma18153679

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Open AccessArticle

Unraveling the Excellent High-Temperature Oxidation Behavior of FeNiCuAl-Based Alloy

by

Guangxin Wu

¹,

Gaosheng Li

²,

Lijun Wei

²,

Hao Chen

¹,

Yujie Wang

¹,

Yunze Qiao

¹,

Yu Hua

¹,

Chenyang Shi

¹,

Yingde Huang

^1,*

and

Wenjie Yang

^1,*

¹

School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China

²

State Power Investment Corporation Limited Central Research Institute, Beijing 102209, China

^*

Authors to whom correspondence should be addressed.

Materials 2025, 18(15), 3679; https://doi.org/10.3390/ma18153679

Submission received: 26 June 2025 / Revised: 26 July 2025 / Accepted: 29 July 2025 / Published: 5 August 2025

(This article belongs to the Special Issue Characterization, Properties, and Applications of New Metallic Alloys)

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Abstract

This study synthesized FeNiCuAlX high-entropy alloys (HEAs) (where X = Cr, Co, Mn) using arc melting and investigated their high-temperature oxidation behavior in air at 900 °C. The oxidation kinetics of all alloys followed a parabolic rate, with the oxidation rate constants (kp) of FeNiCuAlCr, FeNiCuAlCo, and FeNiCuAlMn being approximately two to three orders of magnitude lower than that of the FeNiCu alloy. Specifically, FeNiCuAlCr exhibited the lowest kp value of 1.72 × 10⁻⁶ mg²·cm⁴/s, which is significantly lower than those of FeNiCuAlCo (3.29 × 10⁻⁶ mg²·cm⁴/s) and FeNiCuAlMn (1.71 × 10⁻⁵ mg²·cm⁴/s). This suggests that the addition of chromium promotes the formation of a dense Al₂O₃/Cr₂O₃ oxide layer, significantly enhancing the oxidation resistance. Furthermore, corrosion resistance was assessed through potentiodynamic polarization and electrochemical impedance spectroscopy in a 3.5% NaCl solution. FeNiCuAlCr demonstrated exceptional resistance to localized corrosion, as indicated by its low corrosion current density (45.7 μA/cm²) and high pitting potential (−0.21 V), highlighting its superior corrosion performance.

Keywords: high-entropy alloys; high-temperature oxidation resistance; corrosion resistance

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MDPI and ACS Style

Wu, G.; Li, G.; Wei, L.; Chen, H.; Wang, Y.; Qiao, Y.; Hua, Y.; Shi, C.; Huang, Y.; Yang, W. Unraveling the Excellent High-Temperature Oxidation Behavior of FeNiCuAl-Based Alloy. Materials 2025, 18, 3679. https://doi.org/10.3390/ma18153679

AMA Style

Wu G, Li G, Wei L, Chen H, Wang Y, Qiao Y, Hua Y, Shi C, Huang Y, Yang W. Unraveling the Excellent High-Temperature Oxidation Behavior of FeNiCuAl-Based Alloy. Materials. 2025; 18(15):3679. https://doi.org/10.3390/ma18153679

Chicago/Turabian Style

Wu, Guangxin, Gaosheng Li, Lijun Wei, Hao Chen, Yujie Wang, Yunze Qiao, Yu Hua, Chenyang Shi, Yingde Huang, and Wenjie Yang. 2025. "Unraveling the Excellent High-Temperature Oxidation Behavior of FeNiCuAl-Based Alloy" Materials 18, no. 15: 3679. https://doi.org/10.3390/ma18153679

APA Style

Wu, G., Li, G., Wei, L., Chen, H., Wang, Y., Qiao, Y., Hua, Y., Shi, C., Huang, Y., & Yang, W. (2025). Unraveling the Excellent High-Temperature Oxidation Behavior of FeNiCuAl-Based Alloy. Materials, 18(15), 3679. https://doi.org/10.3390/ma18153679

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Unraveling the Excellent High-Temperature Oxidation Behavior of FeNiCuAl-Based Alloy

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