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The effect of cold-working, i.e. wire drawing, on the corrosion behavior of a 6101 and a 1370 aluminum alloy was investigated in NaCl solutions. For the both alloys, a “grain size - corrosion resistance” was highlighted. The preliminary works performed on Al-Cu welds showed two scales of heterogeneity and two scales of heterogeneity of media which are not considered by the current automotive specifications. Consequently, it seems to be necessary to establish new pertinent specifications to evaluate the new Al solutions.

For tubular terminals and high power junctions, the magnetic pulse crimping (MPC) could be a technical solution to produce aluminum - copper assembly. LEONI has launched a study to evaluate this technology. Besides, the lifetime of vehicle components is an issue that manufacturers should consider during all the development phases from the conception to the validation in service. Consequently, the quality of the interface aluminum-copper obtained by MPC is evaluated in terms of microstructure, of electrical and mechanical properties and to describe the corrosion behavior.