Patent ID: 7790233

Claim:
Process for the formation of a coating of metal oxides comprising at least one precious metal from Group VIII of the Periodic Table of the elements in combination with titanium, zirconium or mixtures thereof, on an electrically conductive substrate; said process consisting of applying, to the said substrate, a solution comprising a non-aqueous solution of one or more metal acetylacetonates dissolved in a one or more solvents which specifically dissolve said one or more metal acetylacetonates, the one or more solvents being selected from the group consisting of alcohols, ketones, chloromethanes and mixtures thereof and then converting said one or more metal acetylacetonates to at least one metal oxide by means of a heat treatment; wherein the electrically conductive substrate is made of steel or of iron and is pretreated, in a first stage, and then in a second stage, said non-aqueous solution of one or more metal acetylacetonates dissolved in a one or more solvents is deposited on said pretreated substrate and the substrate thus coated is dried and then calcined under air or an inert gas enriched with oxygen, at a temperature at least equal to 300° C., for a period of time ranging from 10 minutes to 2 hours.