Abstract: The effect of magnetic field on the corrosion rate and anodic dissolution of axle steel in a naturally inflated sodium chloride solution was studied. The results indicate that the magnetic field had a significant accelerating effect on corrosion within a shorter soaking period, and the influence of the magnetic field weakened when the soaking time prolonged. The magnetic field tended to cause a positive shift in the self corrosion potential, resulting in a decrease in the current density at the beginning of the anodic polarization curve. When performing constant potential polarization in the linear range of current density-potential in the anodic polarization curve, when the polarization potential was low, the current density could reach a steady state after polarization for a period of time. However, when the polarization potential was high, the current density first increased sharply after polarization began and then decreased linearly with time. After applying a magnetic field, there was a small increase in the anode current density, indicating that under the polarization conditions of this experiment, the reaction rate of the sample was mainly not controlled by the mass transfer process of charged ions leaving the electrode surface. The research results could provide a basis for the evaluation and mechanism analysis of the corrosion behavior of metal materials under magnetic field action.