电磁场环境下7075-T6铝合金腐蚀数值模拟

郭巧荣; 颜传志; 卿光辉; 何卫平

doi:10.7643/ issn.1672-9242.2026.01.008

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装备环境工程 ›› 2026, Vol. 23 ›› Issue (1) : 63-73. DOI: 10.7643/ issn.1672-9242.2026.01.008

航空航天装备

电磁场环境下7075-T6铝合金腐蚀数值模拟

郭巧荣¹, 颜传志¹, 卿光辉^1*, 何卫平²

作者信息 +

Numerical Simulation of Corrosion of 7075-T6 Aluminum Alloy under Electromagnetic Field Environment

GUO Qiaorong¹, YAN Chuanzhi¹, QING Guanghui^1*, HE Weiping²

Author information +

文章历史 +

摘要

目的研究电磁场环境下7075-T6铝合金腐蚀行为。方法建立7075-T6铝合金在3.5% NaCl溶液中有无电磁场环境下局部腐蚀模型,以及铝合金与低碳钢在大阳极小阴极的有无磁场下的电偶腐蚀模型,通过电解质电流密度分布云图、腐蚀厚度变化、腐蚀产物追踪分析磁场对腐蚀进程的影响。结果磁场环境下,铝合金腐蚀速率大于无磁场环境下铝合金腐蚀速率。在相同磁场方向,不同磁场大小情况时,13 Gs垂直磁场环境下铝合金腐蚀速率大于40 Gs垂直磁场。在相同磁场大小,不同磁场方向时,13 Gs垂直磁场环境下铝合金的腐蚀速率大于13 Gs水平磁场。分析了在有无磁场下小阴极大阳极沉积模型的腐蚀形貌,从电解质电位、电流密度、腐蚀深度等对比,发现磁场主要改变腐蚀反应的基本属性。结论在恒定的磁场中阳极电流密度增大,传质过程加剧,加速了腐蚀反应进程。

Abstract

The work aims to investigate the corrosion behavior of 7075-T6 aluminum alloy in an electromagnetic field environment. Localized corrosion models were established for 7075-T6 aluminum alloy in 3.5% NaCl solution with and without an electromagnetic field. Additionally, a galvanic corrosion model was developed for the alloy paired with low-carbon steel in a large anode-small cathode configuration under both magnetic and non-magnetic conditions. The influence of the magnetic field on the corrosion process was analyzed through electrolyte current density distribution maps, corrosion thickness variations, and corrosion product tracking. Results revealed that the corrosion rate of the aluminum alloy was higher in the magnetic field environment than in the magnetic field-free environment. Specifically, under the same magnetic field direction but different magnetic field magnitudes, the corrosion rate under a 13 Gs vertical magnetic field exceeded that under a 40 Gs vertical magnetic field. Similarly, under the same magnetic field magnitude but different magnetic field directions, the corrosion rate under a 13 Gs vertical magnetic field was higher than that under a 13 Gs horizontal magnetic field. Corrosion morphology under small cathode/large anode deposition models with and without magnetic fields was analyzed. Comparisons of electrolyte potential, current density, and corrosion depth revealed that magnetic fields primarily altered fundamental properties of the corrosion reaction. Within a constant magnetic field, anodic current density increases, intensifying mass transfer processes and accelerating the corrosion reaction.

导出引用

郭巧荣, 颜传志, 卿光辉, 何卫平. 电磁场环境下7075-T6铝合金腐蚀数值模拟[J]. 装备环境工程. 2026, 23(1): 63-73 https://doi.org/10.7643/ issn.1672-9242.2026.01.008

GUO Qiaorong, YAN Chuanzhi, QING Guanghui, HE Weiping. Numerical Simulation of Corrosion of 7075-T6 Aluminum Alloy under Electromagnetic Field Environment[J]. Equipment Environmental Engineering. 2026, 23(1): 63-73 https://doi.org/10.7643/ issn.1672-9242.2026.01.008

中图分类号： TG172.2 TJ04

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