Atmospheric Corrosion Behavior of Carbon Steel and Galvanized Steel in Alternating Electric Field

A self-made device was used to simulate the liquid film formed on the surface of steel in an atmospheric environment. Electrochemical methods were used to study the cathodic reduction process and corrosion evolution information of carbon steel and galvanized steel under liquid film with different thicknesses, and further clarify the influence of alternating current (AC) electric field with different strengths on galvanized steel. The results show that the zinc layer on the surface of carbon steel could effectively protect the steel matrix, and the presence of liquid film and AC electric field would accelerate the corrosion of carbon steel and galvanized steel. The smaller the thickness of the liquid film and the greater the intensity of the AC electric field, the greater the corrosion rate of galvanized steel.