The corrosion behavior and passive film properties of the cast and annealed AlCoCrFeNi2.1 eutectic high-entropy alloy in sulfuric acid solution

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2024-09-21 DOI:10.1016/j.corsci.2024.112456

Yu Fu , Hong Luo , Xinren Chen , J. Manoj Prabhakar , Xuefei Wang , Hongxu Cheng , Cuiwei Du , Songqing Hu , Xiaogang Li

引用次数: 0

Abstract

The effect of microstructure on the corrosion behavior and film properties of strengthened AlCoCrFeNi_2.1 eutectic high-entropy alloy (EHEA) was investigated. Annealing of the 80 % cold-rolled AlCoCrFeNi_2.1 EHEA at 650–1200 ℃ effectively improved the stable passive region to 930 mV, and decreased the passive current density by 25 % to 3.5 μA/cm² compared with the cast alloy in 0.1 M H₂SO₄ solution. The improved corrosion resistance of the annealed AlCoCrFeNi_2.1 EHEA was attributed to the increasing oxides proportion and thickness of passive film and the reduced composition difference between FCC and B2 phases. The B2 phase in lamellae suffered the severest corrosion.

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硫酸溶液中铸造和退火铝钴铬铁镍2.1共晶高熵合金的腐蚀行为和被动膜特性

研究了微观结构对强化铝钴铬铁镍2.1共晶高熵合金（EHEA）腐蚀行为和薄膜性能的影响。在 650-1200 ℃下退火 80% 的冷轧铝钴铬镍铁 2.1 EHEA 能有效地将稳定无源区提高到 930 mV，与 0.1 M H2SO4 溶液中的铸造合金相比，无源电流密度降低了 25% 至 3.5 μA/cm2。退火后的 AlCoCrFeNi2.1 EHEA 的耐腐蚀性能得到改善，这归因于氧化物比例和被动膜厚度的增加，以及 FCC 相和 B2 相之间成分差异的缩小。薄片中的 B2 相受到的腐蚀最为严重。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.