Influence of Lepidocrocite Film Formed in-situ on Corrosion Behavior of Weathering Steel in the Solution without Cl-

摘要

The corrosion behavior of lepidocrocite (-FeOOH) films in-situ prepared on the surface of Cor-TenAweathering steel (WS) has been investigated by means of electrochemical techniques in 0.25mol/LNa2SO4 solution. The results show slightly protective ability for the -FeOOH film grown in-situ to thesubstrate because of the -FeOOH film changing to compact as the corrosion reaction progresses. But,at the initial stages of the reaction, the films participated in the cathodic reaction and provided noprotection to the substrate.