同轴直接激光沉积CoCrFeNiCu1−xMox高熵合金涂层的组织演变及酸蚀行为

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

Corrosion Science Pub Date : 2022-04-15 DOI:10.1016/j.corsci.2022.110108

Jiakun Wang , Yushan Chen , Yunhua Zhang , Youcai Zhang , Junjie Li , Jin Liu , Yan Liu , Weizhou Li

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引用次数: 0

摘要

开发按需、经济高效的高熵合金(HEA)涂层是非常有前途的。研究了同轴直接激光沉积CoCrFeNiCu1−xMox (x = 0, 0.25, 0.5, 0.75, 1) HEAs在双相不锈钢S32750表面的显微组织和酸蚀性能。结合基于密度泛函理论的第一性原理计算，分析了0.5 M H2SO4溶液中的腐蚀机理。结果表明，FCC结构的CoCrFeNiCu0.25Mo0.75具有理想的耐腐蚀性能，腐蚀电流密度比基材降低了2个数量级，阻抗提高了4.5倍。

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Microstructure evolution and acid corrosion behavior of CoCrFeNiCu1−xMox high-entropy alloy coatings fabricated by coaxial direct laser deposition

Developing on-demand and cost-efficient high-entropy alloy (HEA) coatings is promising. In this work, the microstructure and acid corrosion performance of CoCrFeNiCu_1−xMo_x (x = 0, 0.25, 0.5, 0.75, 1) HEAs fabricated by coaxial direct laser deposition on the surface of duplex stainless steel S32750 was investigated. The corrosion mechanism in 0.5 M H₂SO₄ solution was analyzed by combining the first-principles calculations based on the density functional theory. The results showed that CoCrFeNiCu_0.25Mo_0.75 with FCC structure had the desirable corrosion resistance, which corrosion current density was reduced by two orders of magnitude, and impedance was increased by 4.5 times compared with the substrate.

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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.