ALUMINUM ALLOY COMPOSITE AND METHOD OF BONDING THEREFOR

摘要

A method by which an aluminum alloy part is tenaciously bonded to an FRP prepreg. An aluminum alloy is treated with an adequate liquid to form an aluminum oxide surface film having a surface which has large recesses and protrusions on the order of micrometer and has microfine recesses and protrusions having a period of tens of nanometers and in which no sodium ions are present. This aluminum oxide surface film is thickener than layers formed by natural oxidation. The aluminum alloy part thus treated brings about intensive bonding strength between the alloy and an epoxy adhesive. An epoxy adhesive applied to the aluminum alloy part is cured simultaneously with an FRP prepreg employing the same epoxy adhesive as a matrix. Thus, an FRP/aluminum alloy composite or structure is produced in which the constituent parts have been united at a high bonding strength that has not been attained so far.