Initial corrosion behavior of pure copper and electroplating copper-clad steel in Dagang soil

The initial corrosion behaviors of pure copper and electroplating copper-clad steel in Dagang soil were investigated by burying tests in lab for 30 d, combining polarization curves, electrochemical impedance spectroscopy (EIS), and weight-loss method. It is found that during the initial stage of the corrosion process, the average corrosion rate of pure copper is slightly lower than that of electroplating copper-clad steel, and pure copper exhibits a higher corrosion resistance than electroplating copper-clad steel. There are some differences in the corrosion mechanism between pure copper and electroplating copper-clad steel. The corrosion behavior of pure copper is mainly affected by diffusion control.