To meet the continuing demands for more fuel efficient and environmentally clean cars, the automobile industry has turned to lighter materials of construction for many components. Because of its light weight - 1/3 the weight of steel on a direct substitution basis - aluminum long has been a prime candidate. Today and for the foreseeable future aluminum will be joined to non-aluminum components creating critical areas of bi-metallic contact. This paper discusses the corrosion performance of aluminum alloys in bimetal assemblies.

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