Abstract:To address the corrosion phenomenon of steel components of transmission and substation towers in coastal industrial areas, the corrosion media solutions containing six different concentrations of NaCl were formulated to simulate the ocean-industrial atmosphere, and the galvanized steel specimens were treated with wetdry cycle method, then the corrosion weight loss behavior of galvanized steel specimens was analyzed. The results showed that the corrosion weight gain of galvanized steel increases with the increase of the number of wet-dry cycles.The corrosion process of galvanized steel can be divided into three phases: early corrosion, mid-corrosion and late corrosion, with the early and the mid-corrosion in the corrosion deceleration phase and the late corrosion in the corrosion acceleration phase.The presence of Cl- shortens the time for galvanized steel to move to the next corrosion phase, and the solutions containing Cl- and HSO3- corrosion medium were more corrosive. The results of this study are of great significance for the maintenance of transmission and substation equipment.