Scholarlink

<p>This study elaborated on the effect of HSO<sub>3</sub><sup>−</sup> concentration on corrosion behavior of FeCoNi HEA in simulated marine environment via electrochemical measurement, surface analysis techniques, and periodic wet–dry cyclic corrosion test. Related results imply that the anti-corrosion property of the HEA is significantly weakened with the increase of HSO<sub>3</sub><sup>−</sup> concentration, especially at high concentration of 0.1&#xa0;mol/L. This difference in corrosion resistance is verified by different levels of corrosion morphological damage and passivation film dissolution. As HSO<sub>3</sub><sup>−</sup> concentration rises, the HEA surface state evolves from passivation to activation, and the cathodic reaction changes from oxygen consumption to hydrogen evolution, revealing that the increased HSO<sub>3</sub><sup>−</sup> concentration promotes the corrosion occurrence. Moreover, with increasing NaHSO<sub>3</sub>, the acidification degree of test solution is remarkedly enhanced, which severely destroys surface passive film, causing the generation of large numbers of defects inside the film, i.e., resulting in high corrosion rate and serious corrosion degree of the HEA.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Insight into Corrosion Mechanism of FeCoNi High Entropy Alloy in Simulated Acidified Marine Environment

  • 期刊论文

  • 发表日期：

    2025年2月13日

查看全文
  • Q. H. Ni,
  • Z. X. Ye,
  • M. Zhu,
  • Y. F. Yuan,
  • S. Y. Guo

摘要

This study elaborated on the effect of HSO3− concentration on corrosion behavior of FeCoNi HEA in simulated marine environment via electrochemical measurement, surface analysis techniques, and periodic wet–dry cyclic corrosion test. Related results imply that the anti-corrosion property of the HEA is significantly weakened with the increase of HSO3− concentration, especially at high concentration of 0.1 mol/L. This difference in corrosion resistance is verified by different levels of corrosion morphological damage and passivation film dissolution. As HSO3− concentration rises, the HEA surface state evolves from passivation to activation, and the cathodic reaction changes from oxygen consumption to hydrogen evolution, revealing that the increased HSO3− concentration promotes the corrosion occurrence. Moreover, with increasing NaHSO3, the acidification degree of test solution is remarkedly enhanced, which severely destroys surface passive film, causing the generation of large numbers of defects inside the film, i.e., resulting in high corrosion rate and serious corrosion degree of the HEA.