Abstract

The kinetics of anodic iron dissolution in sulphate ions containing solutions, which are free of oxygen, were investigated in the range between active and passive states of the metal at pH ⋍ 5. The measurements were carried out at fixed electrodes under mechanical stirring of the electrolyte at T = 298K using galvanostatic as well as potentiostatic pulse technique. In the prepassive range the obtained transients indicate transition states, which can be attributed to parallel reactions to the active metal dissolution. The mechanism of the metal dissolution in the prepassive range is discussed.

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