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|1. (WO2017195808) ALUMINUM ALLOY MATERIAL, ALUMINUM ALLOY MATERIAL PROVIDED WITH ADHESIVE RESIN LAYER, JOINED BODY, AND PRODUCTION METHOD FOR ALUMINUM ALLOY MATERIAL|
|Applicants:||KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
|Title:||ALUMINUM ALLOY MATERIAL, ALUMINUM ALLOY MATERIAL PROVIDED WITH ADHESIVE RESIN LAYER, JOINED BODY, AND PRODUCTION METHOD FOR ALUMINUM ALLOY MATERIAL|
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%.