The Influence of Iodide Ions and Carbon Monoxide on the Anodic Dissolution of Active Iron

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Abstract
The kinetics of the dissolution of iron in sulfuric acid was investigated by polarizaton measurements in the presence of iodide ions or carbon monoxide as an inhibitor. The measurements included an oscillographic study of transient phenomena as well as steady states. The adsorption of iodide ions on iron was measured as a function of iodide concentration and anodic current density. The effects of iodide ions and carbon monoxide depend on the amount of inhibitor adsorbed on the iron surface. A possible mechanism for the dissolution of iron in the presence of iodide ions and carbon monoxide has been developed in analogy to the mechanism proposed earlier for the behavior in solutions not containing these inhibitors.

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