单相 FCC Co-Cr-Fe-Ni-V 高熵合金的缝隙腐蚀模拟

IF 1.6 4区材料科学 Q2 Materials Science

Transactions of The Indian Institute of Metals Pub Date : 2024-06-21 DOI:10.1007/s12666-024-03379-9

R. Girish Khanna, Sumanta Samal

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引用次数: 0

摘要

本研究的主要目的是首次采用有限元法模拟单相面心立方（FCC）Co25Cr20Fe25Ni25V5 高熵合金（HEA）在 2.4 M 氯化钠溶液中 72 小时和 168 小时的缝隙腐蚀，包括 Tafel 试验。这种高熵合金具有良好的抗电偶降解性，168 小时内单位面积的劣化电流为 1.1236 × 10-4 Acm-2，最大模拟缝隙腐蚀速率为 0.978 mmpy 和 17.335 mmpy，缝隙尖端末端的最大电解质电位为 2.在 24 小时和 168 小时的时间跨度后，所研究的单相 HEA 显示出更强的耐缝隙腐蚀性，这归因于形成了由 Cr、Ni 和 V 组成的均匀氧化层。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Crevice Corrosion Simulation of Single-Phase FCC Co–Cr–Fe–Ni–V High Entropy Alloy

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Crevice Corrosion Simulation of Single-Phase FCC Co–Cr–Fe–Ni–V High Entropy Alloy

The primary objective of the present study is to simulate the crevice corrosion for the first time in a single-phase face-centered cubic (FCC) Co₂₅Cr₂₀Fe₂₅Ni₂₅V₅ high entropy alloy (HEA) by finite element method including Tafel test for 72 and 168 h in a 2.4 M sodium chloride solution. This HEA has good galvanic degradation resistance with inferior degradation current per area of 1.1236 × 10^–4 Acm⁻² for 168 h. The maximum simulated crevice corrosion rate is 0.978 mmpy and 17.335 mmpy and the maximum electrolyte potential at the end of crevice tip is 2.68 × 10^–4 V and 4.7 × 10^–3 V after a time span of 24 and 168 h. The studied single-phase HEA exhibits enhanced crevice corrosion resistance which is attributed to the formation of constitutionally uniform oxide layer of Cr, Ni, and V.

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来源期刊

Transactions of The Indian Institute of Metals Materials Science-Metals and Alloys

CiteScore

2.60

自引率

6.20%

发文量

期刊介绍： Transactions of the Indian Institute of Metals publishes original research articles and reviews on ferrous and non-ferrous process metallurgy, structural and functional materials development, physical, chemical and mechanical metallurgy, welding science and technology, metal forming, particulate technologies, surface engineering, characterization of materials, thermodynamics and kinetics, materials modelling and other allied branches of Metallurgy and Materials Engineering. Transactions of the Indian Institute of Metals also serves as a forum for rapid publication of recent advances in all the branches of Metallurgy and Materials Engineering. The technical content of the journal is scrutinized by the Editorial Board composed of experts from various disciplines of Metallurgy and Materials Engineering. Editorial Advisory Board provides valuable advice on technical matters related to the publication of Transactions.