Structures fabricated from aluminium components and process...

Details Structures fabricated from aluminium components and process... Structures fabricated from aluminium components and process...

C - Chemistry, Metallurgy

23

C

13/15, 117/230

C23C 28/00 (2006.01) B23K 11/18 (2006.01) B23K 11/34 (2006.01) B23K 35/00 (2006.01) C09J 5/02 (2006.01) F16B 11/00 (2006.01)

Patent

CA 1246944

ABSTRACT STRUCTURES FABRICATED FROM ALUMINIUM COMPONENTS AND PROCESSES INVOLVED IN MAKING THESE STRUCTURES Aluminium alloy components are coated with adhesive and spot-welded together, but are pre-treated to form a surface layer containing at least 5% by weight of chromium. Conversion coating and "no-rinse" pre-treatments are described. Enviromentally stable structural adhesive bonds are formed. The pre-treatment can be performed more rapidly than in prior art structures. The components can be formed from aluminium sheet which has been pre-treated and then preferably coated with press-lubricant. Such sheet can be stored for up to 6 months prior to forming.

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