Abstract

The possible inhibiting effects of GaO 3 3−, GeO 3 2−, CrO 3 2−, and MoO 4 2− ions on anodic and cathodic reactions on iron in 5 M KOH were studied. It was shown that a concentration of these ions of 10 −3 M inhibits the anodic iron dissolution reaction 2–3 times, while no effect on the hydrogen evolution reaction was observed. The effect was explained by the underpotential deposition of adatoms of the metal complexing ions on the iron electrode.

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