Effect of surface pretreatment on adhesive properties of aluminum alloys

Abstract

Abstract: The lap-shear strength and durability of adhesive bonded Al alloy joints with different pretreatments were studied by the lap-shear test and wedge test. The results indicate that the maximum lap-shear strength and durability of the bonding joints pretreated by different processes are influenced by the grade of abrasive papers and can be obviously improved by phosphoric acid anodizing. Alkali etching can obviously improve the durability of bonding joints although it slightly influences the maximum lap-shear strength. The process which is composed of grit-finishing, acetone degreasing, alkali etching and phosphoric acid anodizing, provides a better adhesive bonding property of Al alloy.

Key words: Aluminum alloy, Adhesive bonding, Abrasive paper, Alkaline etching, Phosphoric acid anodizing

Jinsheng ZHANG, Xuhui ZHAO, Yu ZUO, Jinping XIONG, Xiaofeng ZHANG. Effect of surface pretreatment on adhesive properties of aluminum alloys[J]. J Mater Sci Technol, 2008, 24(02): 236-240.

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