Abstract
The amount of iron in passive film has been determined by cathodic and anodic stripping voltammetry. The anodic stripping method was carried out by applying an indirect procedure involving exchange between ferric ion and lead-EDTA complex. All of the anodic film was stripped off without any accompanying corrosion of the basic iron on application of a current density of between 2.0 and 11.1 μA cm −2 at pH>8.0. The experimental results indicate that the number of electrons involved in the cathodic reduction is two per atom of the dissolved iron, which agrees well with the reduction mechanism proposed previously.
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