METHOD FOR MANUFACTURING RESIN-BONDING ALUMINUM-CASTING ALLOY MEMBER AND RESIN-BONDING ALUMINUM-CASTING ALLOY MEMBER OBTAINED BY THE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a resin-bonding aluminum-casting alloy member, whereby an aluminum-casting alloy member excellent in aluminum-resin bondability can be readily manufactured through a simple method, and to provide the resin-bonding aluminum-casting alloy member obtained by the method.;SOLUTION: A method for manufacturing a resin-bonding aluminum-casting alloy member comprises steps of: preparing an aluminum-casting alloy substrate containing 0.9-18 mass% Si and 1.0-10.0 mass% Mg by die-casting; and subsequently dissolving Mg₂Si crystallized product at a surface of the aluminum-casting alloy substrate by subjecting the aluminum-casting alloy substrate to an etching treatment using an acidic etching solution comprising an aqueous solution of sulfuric acid and/or nitric acid under a condition where the treatment temperature is 30-80°C and the treatment time is 5-15 min, thereby forming fine concavo-convex shapes excellent in resin bondability on the surface of the aluminum-casting alloy substrate. The resin-bonding aluminum-casting alloy member is obtained by the method.;COPYRIGHT: (C)2013,JPO&INPIT