Abstract
Impedance measurements and steady state polarization are used for the study of the anodic behavior of Fe-15Cr and Fe-25Cr alloys in concentrated chloride media. Mass transport limited current plateaux are observed due to salt film precipitation. The rate of dissolution at the limiting current is controlled by the rate of mass transport of ferrous ion from the film into the solution. Impedance data on Fe-15Cr at the limiting current are interpreted by a model previously used for iron in which the anodic salt film consists of an outer porous layer and an inner compact layer.
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