Scholarlink

<p>This work investigated the co-effect of galvanic couple and alternating current (AC) on the corrosion behavior of FeCoNi HEA and X100 steel in simulated Golmud soil solution. The results indicate that the application of the two factors facilitates the corrosion of the HEA and steel, especially for X100 steel, reflected by increased corrosion rate and corrosion current density. Due to the alternation of positive and negative half-cycles of the applied AC, X100 steel acted as the anode of galvanic couple suffers strong dissolution and the γ-FeOOH/α-FeOOH proportion in the corrosion product film is remarkedly raised, increasing defective points within the film, which significantly decreases the anti-corrosion property of the steel. For the HEA, the combined effect of galvanic couple and AC interference disrupts the generation and stability of passive film, which diminishes the film protectiveness. Moreover, under the applied AC, the formation of soluble chlorides reacted between more adsorbed Cl<sup>-</sup> ions and the oxides within passive film, promoting the film dissolution, which heightens the degree of corrosion pits on 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

Research on Galvanic Corrosion Behavior of FeCoNi High-Entropy Alloy Coupled with X100 Steel under Imposed AC

  • 期刊论文

  • 发表日期：

    2025年8月19日

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

摘要

This work investigated the co-effect of galvanic couple and alternating current (AC) on the corrosion behavior of FeCoNi HEA and X100 steel in simulated Golmud soil solution. The results indicate that the application of the two factors facilitates the corrosion of the HEA and steel, especially for X100 steel, reflected by increased corrosion rate and corrosion current density. Due to the alternation of positive and negative half-cycles of the applied AC, X100 steel acted as the anode of galvanic couple suffers strong dissolution and the γ-FeOOH/α-FeOOH proportion in the corrosion product film is remarkedly raised, increasing defective points within the film, which significantly decreases the anti-corrosion property of the steel. For the HEA, the combined effect of galvanic couple and AC interference disrupts the generation and stability of passive film, which diminishes the film protectiveness. Moreover, under the applied AC, the formation of soluble chlorides reacted between more adsorbed Cl- ions and the oxides within passive film, promoting the film dissolution, which heightens the degree of corrosion pits on the HEA.