Corrosion of Q235 in dagang simulated solution at different temperatures

The corrosion of Q235 in Dagang simulated solution at different temperatures was studied by means of polarization curves, linear polarization and EIS. In the range of 20 - 50 °C , the corrosion potential was close to the equilibrium potential of the anodic reaction. Corrosion process was controlled by the oxygen transmission of the cathodic process. When the temperature was elevated, corrosion current density Imrr increased, the linear polarization resistance Rp and the charge transfer resistance Rt reduced, and the corrosion rate increased primarily by the increasing of the transmission of reactant in the cathodic process.