METHOD FOR PRETREATING SURFACE OF ALUMINUM OR ALUMINUM ALLOY PART TO BE WELDED AND CORRESPONDING WELDED PART

摘要

PPROBLEM TO BE SOLVED: To provide a method for pretreating aluminum or aluminum alloy parts to be welded and welded parts prepared by the method. PSOLUTION: The method for pretreating the surfaces of the aluminum or the aluminum alloy parts to be welded and the welded parts prepared by the method are described. Prior to welding, the parts to be welded are subjected to treatment (17) by an aqueous acidic solution. The aqueous acidic solution contains the ions of boron and/or silicon and/or titanium and/or zirconium and/or hafnium elements. Better slide in a feeder is made possible during a welding process by performing a polishing stage (9) prior to the treatment in the aqueous acidic solution. PCOPYRIGHT: (C)2005,JPO&NCIPI