Aluminum Surface Treatments for Simplified Adhesive Bonded Repair
Final rept. 1 May 1988-1 Apr 1989
CAPE COD RESEARCH INC BUZZARDS BAY MA
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A new method for simplified adhesive bonded repair of aluminum structures was developed as a possible replacement for current pre-bond surface treatments. A series of adhesive primers, based on novel polyepoxide derivatives were prepared and tested on aluminum aircraft alloys which had been pretreated by a variety of different techniques. Experimental formulations were identified which when applied to surfaces that had been abraded by a new process developed by the AF yielded adhesive bonds with the initial strength and durability of those prepared by FPL etch pretreatment and commercial primers. The AF has been searching for viable replacements for the hazardous and cumbersome pre-bond surface treatments currently employed for the field repair of aircraft structures. There is also a need to replace anti-corrosion primers based on hexavalent chromium compounds because of their toxicity.
- Physical Chemistry
- Polymer Chemistry
- Adhesives, Seals and Binders