Elsevier

Corrosion Science

Volume 33, Issue 2, February 1992, Pages 203-210
Corrosion Science

On the electrochemical behaviour of aluminium in acidic chloride solution

https://doi.org/10.1016/0010-938X(92)90145-SGet rights and content

Abstract

The electrochemical behaviour of aluminium in 0.1 M hydrochloric acid solution positive of the open circuit potential (OCP) has been studied using open circuit potential measurements, linear sweep voltammetry and electrochemical impedance spectroscopy at stationary and rotating high purity aluminium disc electrodes. Freshly polished electrodes show an induction time before the OCP changes negatively towards its steady-state value. Steady-state current-voltage profiles show two distinct almost linear, non-Tafelian regions positive of the OCP. Evidence for pitting corrosion through a salt film and dissolution via ionic migration through the thin oxide film as parallel corrosion paths is discussed.

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