ROUGHENED HOT-DIP AL-SI ALLOY PLATED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME, AND COMPOSITE MATERIAL OBTAINED BY JOINING THE ROUGHENED HOT-DIP AL-SI ALLOY PLATED STEEL SHEET AND THERMOPLASTIC RESIN COMPOSITION MOLDED BODY TOGETHER, AND METHOD FOR MANUFACTURING THE COMPOSITE

摘要

PROBLEM TO BE SOLVED: To provide a roughened Al-based plated steel sheet capable of giving good adhesiveness when a thermoplastic resin is brought into contact with the surface of the Al-based plated steel sheet.;SOLUTION: A hot-dip Al-Si alloy plated steel sheet having an Al-Si plated layer having an Si content in the range of 5 to 13 mass% is prepared. The hot-dip Al-Si alloy plated steel sheet is immersed in an oxidative acidic aqueous solution to form a plurality of pits on the surface of the plating layer, the pits having an average depth of 0.2 m or more and the average depth from the plating layer surface in a proportion of 80% or less with respect to the film thickness of the plating layer. The oxidative acidic aqueous solution is preferably a ferric chloride aqueous solution.;COPYRIGHT: (C)2011,JPO&INPIT