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<p>The AlCo<sub>0.5</sub>Cr<sub>1.5</sub>FeNi<sub>2.1</sub> high-entropy alloy (HEA) with abnormal microstructure and excellent corrosion resistance was synthesized by non-consumable vacuum arc furnace. The AlCo<sub>0.5</sub>Cr<sub>1.5</sub>FeNi<sub>2.1</sub> HEA was composed of the face-centered cubic (FCC) phases, the body-centered cubic (BCC) phases, and the ordered BCC (B2) phases. The pitting potential (<i>E</i><sub>pit</sub>), passive current density (<i>I</i><sub>pass</sub>), and polarization resistance (<i>R</i><sub><i>p</i></sub>) of the AlCo<sub>0.5</sub>Cr<sub>1.5</sub>FeNi<sub>2.1</sub> HEA in 3.5 wt.% NaCl solution were 0.51 V, 6.40E−06 A/cm<sup>2</sup>, and 273.08 × 10<sup>3</sup>&#xa0;Ω&#xa0;cm<sup>2</sup>, respectively. The excellent corrosion resistance of the alloy indicated its potential application in marine engineering fields.</p>

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Microstructure and Corrosion Properties of the AlCo0.5Cr1.5FeNi2.1 High-Entropy Alloy

  • 期刊论文

  • 发表日期：

    2025年12月5日

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  • Ke Yang,
  • Wenxuan Li,
  • Longtu Yang,
  • Yong Dong,
  • Lingbo Mao

摘要

The AlCo0.5Cr1.5FeNi2.1 high-entropy alloy (HEA) with abnormal microstructure and excellent corrosion resistance was synthesized by non-consumable vacuum arc furnace. The AlCo0.5Cr1.5FeNi2.1 HEA was composed of the face-centered cubic (FCC) phases, the body-centered cubic (BCC) phases, and the ordered BCC (B2) phases. The pitting potential (Epit), passive current density (Ipass), and polarization resistance (Rp) of the AlCo0.5Cr1.5FeNi2.1 HEA in 3.5 wt.% NaCl solution were 0.51 V, 6.40E−06 A/cm2, and 273.08 × 103 Ω cm2, respectively. The excellent corrosion resistance of the alloy indicated its potential application in marine engineering fields.