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Methods for inhibiting the microbiologically influenced corrosion of a metal are provided comprising treating the surface of the metal with a microbiologically influenced corrosion inhibiting effective amount of a source of rare earth metal ions; wherein the surface of the metal is in the presence of corrosive reagents such as chloride ions and acids and one or more microorganisms capable of colonizing on and/or embedding into the surface and preventing self-healing of the surface of the metal damaged by the corrosive reagents.