ALUMINUM ALLOY MATERIAL, ALUMINUM ALLOY MATERIAL PROVIDED WITH ADHESIVE RESIN LAYER, JOINED BODY, AND PRODUCTION METHOD FOR ALUMINUM ALLOY MATERIAL

摘要

The present invention relates to an aluminum alloy material that comprises: an aluminum alloy base material; and a coating film that is formed on at least one portion of the surface of the aluminum alloy base material and that comprises an oxide of aluminum that includes silicon. Over a pre-and-post-coating difference spectrum obtained by Fourier-transform infrared spectroscopy using parallel polarized light that is incident at an angle of 75°, the coating film has an absorption peak top in the wavenumber domain of 1550-1650 cm^-1, and the absorbance of the coating film at said peak top is 0.001 or higher. The Si content of the coating film is at least 20 at% but less than 80 at%, the Mg content of the coating film is at least 0.1 at% but less than 30 at%, and the Cu content of the coating film is restricted to less than 0.6 at%.