Corrosion behaviour of an assembly between an AA1370 cable and a pure copper connector for car manufacturing applications

Abstract

OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. Any correspondence concerning this service should be sent to the repository administrator: staff-oatao@listes-diff.inp-toulouse.fr The corrosion behaviour of an assembly between an AA1370 cable and a pure copper connector for wiring harnesses was studied in neutral chloride and sulphate containing solution. Electrochemical impedance measurements showed that the corrosion behaviour of the cable was controlled by the ingress of the electrolyte inside cable cavities. Further, local impedance measurements were performed on two assembly cross-sections, i.e. with and without cavities in the aluminium cable. The results provided evidence for both the galvanic coupling between aluminium and copper and the presence of cavities in the aluminium cable as relevant explanations for the corrosion behaviour of the assembly. ©

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