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AssigneeGM Global Technology Operations LLC
InventorsJessica A. Schroeder, Anil K. Sachdev, Mark W. Verbrugge, Thomas C. Pederson
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In an illustrative embodiment, two panels of different materials may be bonded with a structural adhesive composition comprising microcapsules containing corrosion inhibiting materials for protecting the panels from corrosion. For example, a steel vehicle door outer panel may be bonded to an aluminum alloy or magnesium alloy inner panel using an epoxy adhesive. Dispersed within the uncured adhesive are an abundance of microcapsules filled with a fluid or mobile material for reacting with the iron and/or aluminum or magnesium to inhibit corrosion arising from the facing surfaces of the mixed metal panels. The protective material is released from the microcapsules for diffusion through the cured or uncured interfacial adhesive to react with one or both panel surfaces and form a protective coating on the surfaces.
A method of forming a corrosion resistant adhesive bond between facing panel surfaces of different compositions where the composition of at least one of the surfaces is susceptible to corrosion;
An assembly comprising facing panel surfaces of different compositions, the facing surface being bonded with an interfacial layer of a structural adhesive composition, where the composition of at least one of the panel surfaces is susceptible to corrosion due to its proximity to the facing panel surface, the adhesive initially comprising microcapsules of a corrosion inhibiting composition for the at least one surface composition, corrosion inhibiting composition having been released from the microcapsules for corrosion-impeding contact with at least one of the surfaces.
Dependencies are inferred from the claim text.