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Effect of Magnetic Field on Electrochemical Corrosion Behavior of H62 Brass Alloy
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Effect of Magnetic Field on Electrochemical Corrosion Behavior of H62 Brass Alloy
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Journal Article
Effect of Magnetic Field on Electrochemical Corrosion Behavior of H62 Brass Alloy
2025
Overview
This study investigates the influence of magnetic fields on the electrochemical corrosion behavior of aerospace-grade H62 brass alloy in 3.5 wt% NaCl solution and its underlying 10 mechanisms. Employing electrochemical testing techniques combined with surface characterization methods, we explored the effects of magnetic field intensity (25–100 mT) and orientation (parallel and perpendicular to electrode surface) on the corrosion kinetics and corrosion product evolution of H62 brass alloy. Results demonstrate that magnetic fields significantly accelerate the corrosion process of H62 brass alloy. Under parallel magnetic field (100 mT), the corrosion current density increased from 0.49 μA/cm2 to 3.66 μA/cm2, approximately 7.5 times that of the non-magnetic condition, while perpendicular magnetic field increased it to 1.73 μA/cm2, approximately 3.5 times the baseline value. The charge transfer resistance decreased from 3382 Ω·cm2 to 1335 Ω·cm2. Magnetic field orientation determines the fundamental differences in corrosion acceleration mechanisms. Parallel magnetic fields primarily enhance mass transfer processes through Lorentz force-driven magnetohydrodynamic (MHD) effects, resulting in intensified uniform corrosion; perpendicular magnetic fields alter interfacial ion distribution through magnetic gradient forces, inducing localized corrosion tendencies. Magnetic fields promote the transformation of protective Cu2O films into porous Cu2(OH)3Cl, reducing the protective capability of corrosion product layers.
