Rotating disc electrode study of anodic dissolution or iron in concentrated chloride media

Abstract The anodic dissolution of iron in concentrated neutral and acid chloride media was investigated by measuring anodic potentionstatic polarization curves on a rotating disc electrode. Well defined mass transport limited current plateaux were observed, the diffusion limiting species being the Fe 2+ ion. Experiments performed in binary FeCl 2 electrolytes showed that the FeCl 2 concentration at the anode at limiting current was equal to the saturation concentration. A semiempirical method for estimating the magnitude of the plateau current in different chloride media is outlined.