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

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy material which hardly causes deterioration in bond strength even when exposed to a high temperature wet environment and has excellent bond durability.;SOLUTION: There is provided an aluminum alloy material 10 which comprises: an aluminum alloy base material 3 and a coating film 2 comprising an oxide of aluminum containing silicon, which is formed on at least one part of a surface of the aluminum alloy base material 3, wherein in the differential spectrum before and after film treatment obtained by Fourier-transform infrared spectroscopy using parallel polarized light which is incident at an angle of 75°, the coating film 2 has an adsorption peak top in the wavenumber region of 1550 to 1650 cm^-1, the absorbance at the peak top is 0.001 or more and the coating film 2 contains 20 to less than 80 atom% of Si and 0.1 to less than 30 atom% of Mg in which the content of Cu is restricted to less than 0.6 atom%. Preferably, the aluminum alloy material has no adsorption in the wavenumber region of 1440 to 1540 cm^-1 in the differential spectrum.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT