An acid pretreatment method to improve adhesion to aluminum...

C - Chemistry – Metallurgy – 09 – J

Patent

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C09J 5/02 (2006.01) C23C 22/56 (2006.01)

Patent

CA 2417668

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.

Une feuille, une plaque, un moulage ou une extrusion d'alliage d'aluminium possédant une couche superficielle contenant de l'oxyde de magnésium et de l'oxyde d'aluminium est nettoyé avec une solution acide. Cet élément nettoyé possède une couche d'oxyde d'aluminium qui est prétraitée avec un acide organique contenant du phosphore de façon à former une couche fonctionnalisée. Une couche d'adhésif polymère est appliquée sur cette couche fonctionnalisée, et cette couche d'adhésif est jointe à une structure de support métallique de façon à former un assemblage de pièces de véhicule.

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