Abstract: The invention relates to metallic products and a process for producing these which allows, despite the complexity of their structure, for them to be produced in refractory alloys based on chromium. The chromium is deposited by electrolysis, this being carried out by means of a bath with high throwing power. The formation of the alloy with layers of other metallic constituents is obtained by thermal diffusion. The provision of aluminum is controlled in the form of particles by immersing, by spraying or “painting.” The structures according to the invention are particularly intended to be used as catalyst supports or filtering agents.