METHOD FOR PRETREATING THE SURFACES OF WELD PARTS OF ALUMINUM OR ALLOYS THEREOF AND CORRESPONDING WELD PARTS

摘要

Method is used for the surface preparation of aluminium (Al) and Al alloy part to be welded, is polished before welding assembly and then handles here in an acidic aqueous solution and/or silicon (Si) and/or titanium (Ti) and/or zirconium (Zr) and/or hafnium (Hf) ion for boron (B). One independent claims be put into a weldering Al or Al alloy part (it is required that).