NOVELTY - The method for manufacturing an aluminum metal assembly (1) having a metal layer made of a first metal on a surface of a metal object (10) that is made of a second metal, comprises thermally treating the metal object to a temperature of 80-100 degrees C of melting temperature of constituent material to create and stabilize alpha alumina layer by allotropic transformation of an oxide layer present on a surface of the object and then cooling, placing a metal foam (20) having an open porosity on a surface of the metal object, and applying a mechanical stress on the metal foam.    USE - The method is useful for manufacturing an aluminum metal assembly, which is useful for fabricating electrodes of fuel cell.    ADVANTAGE - The method is capable of rapidly, easily, economically and energy-efficiently manufacturing the aluminum metal assembly with high tensile strength and rigidity, good corrosion resistance and conductivity and light weight.    DETAILED DESCRIPTION - The method for manufacturing an aluminum metal assembly (1) having a metal layer made of a first metal on a surface of a metal object (10) that is made of a second metal, comprises thermally treating the metal object to a temperature of 80-100 degrees C of melting temperature of constituent material to create and stabilize alpha alumina layer by allotropic transformation of an oxide layer present on a surface of the object and then cooling, placing a metal foam (20) having an open porosity on a surface of the metal object, applying a mechanical stress on the metal foam so that the foam is embedded in the surface of the object, and densifying the metal layer during which an additional metal layer made of a third material is applied on an metal assembly. The object consists of a wire, a cable, a bar, a sheet and an aluminum sheet. The application of the mechanical stress on the metal foam is carried out by cold roll bonding, pressing, embossing, stamping, printing, crimping or laminating. The crimping is performed using a thimble of which an inner surface is covered by the metal foam. The metal foam is entirely embedded on the surface of the metal object. The application of the additional metal layer on the metal assembly is carried out by chemical or electrolytic deposition, where the additional metal layer is an additional metal foam. An INDEPENDENT CLAIM is included for a metal assembly.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a metal assembly.    Aluminum metal assembly (1)    Metal object (10)    Metal foam. (20)