Inhibition by zinc-molybdate mixtures of corrosion of mild steel

Abstract

The nature and origin of the synergistic interaction between zinc cations and molybdate anions in the inhibition of the corrosion of mild steel in chloride solutions has been investigated. It is concluded that the better inhibition obtained with mixtures than with the indilvidual components is due to the mixture acting as a cathodic inhibitor, by precipitation of a basic zinc molybdate on the surface. Any anodic effects of the molybdate do not contribute to the reduction in corrosion rate.

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