Patent Number: 6,167,609

Title: Acid pretreatment for adhesive bonding of vehicle assemblies

Abstract: An aluminum alloy sheet, plate, casting or extrusion having a surface layer containing magnesium oxide and aluminum oxide is cleaned with an acidic solution. The cleaned component has an aluminum oxide layer that is pretreated with a phosphorus-containing organic acid to form a functionalized layer. A layer of polymeric adhesive is applied to the functionalized layer, and the adhesive layer is joined to a metal support structure to form a vehicle assembly.

Inventors: Marinelli; James M. (Murrysville, PA), McCleary; Sherri F. (Apollo, PA), Costrini; John V. (Apollo, PA), Nitowski; Gary A. (Lower Burrell, PA), Siemon; John T. (Cheswick, PA)

Assignee: Aluminum Company of America

International Classification: C09J 5/02 (20060101); C23C 22/56 (20060101); C23C 22/05 (20060101); B21D 035/00 ()

Expiration Date: 01/02/2018