Aluminum alloy material, aluminum alloy material with adhesive resin layer, bonded body, and method for manufacturing 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 two absorption bands in the wavenumber range of 1000-1300 cm-1, and the two absorption bands are in the wavenumber ranges of 1080-1140 cm-1 and 1180-1240 cm-1. The Si content of the coating film is at least 20 at% but less than 70 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%.