Effects of Magnetic Field on the Corrosion Reactions of A572 Steel in NaCl Aqueous Solution

The effects of magnetic field on the corrosion behaviors of A572 steel were studied by electrochemical and immersion tests in 0.6 M sodium chloride aqueous solution at room temperature. A magnetic field of 2-15 mT was applied in the normal direction of the specimen during the corrosion tests. Post-corrosion characterization was performed by using scanning electron microscopy (SEM) and x-ray photoelectron spectroscopy (XPS). Specifically, it was found that the weight loss of A572 steel decreased by similar to 81% under a magnetic field of 15 mT after the immersion test of 35 days. Potentiodynamic and potentiostatic test results showed an increase in corrosion potential and a reduction of corrosion current density when magnetic field was applied, accompanied by the formation of fewer pits on the surface. Depth-profiling XPS analysis indicated a significant reduction of Fe3+ to Fe2+ ratio on the corroded surface when magnetic field was applied, confirming its effective inhibition of anodic metal dissolution.

Automated summary

The effects of magnetic field on the corrosion behaviors of A572 steel were investigated in 0.6 M sodium chloride solution. The results showed that the weight loss of A572 steel decreased and the corrosion potential increased while the corrosion current density decreased under the applied magnetic field. Analysis also confirmed the effective inhibition of anodic metal dissolution by the magnetic field.