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

GUO Qiaorong; YAN Chuanzhi; QING Guanghui; HE Weiping

doi:10.7643/ issn.1672-9242.2026.01.008

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Equipment Environmental Engineering ›› 2026, Vol. 23 ›› Issue (1) : 63-73. DOI: 10.7643/ issn.1672-9242.2026.01.008

Aviation and Aerospace Equipment

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

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

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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.

Key words

aluminum alloy / electromagnetic field / localized corrosion / corrosion morphology / corrosion mechanism / COMSOL simulation

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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

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