To investigate the generation mechanism and variation law of ship corrosion electric field under navigation conditions. The galvanic corrosion cathode of the ship propeller was equated to a rotating disk, and an equivalent model of the corrosion electric field of the rotating disk under turbulent medium conditions was established. Combining the boundary layer theory in fluid mechanics and electrochemical corrosion related theories, the boundary layer flow state and corrosion current density on the surface of a disk under laminar and turbulent medium flow conditions was calculated, and differentiation treatment on the disk was performed. Finally, the multiple point charge superposition method was used to calculate the corrosion electric field of a rotating disk under the control of oxygen mass transfer in a flowing medium. The variation law of corrosion electric field on rotating disks at different speeds was studied and experimentally verified. The results indicate that as the rotational speed of the disk increases, the corrosion electric field gradually increases. When the flow state of the medium on the surface of the disc gradually transitions from laminar to turbulent, the corrosion electric field modulus increases significantly.