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Corrosion Behavior of 6101 Aluminum Alloy Strands for Automotive Wires

Laurino, Adrien and Andrieu, Eric and Harouard, Jean-Paul and Lacaze, Jacques and Lafont, Marie-Christine and Odemer, Grégory and Blanc, Christine Corrosion Behavior of 6101 Aluminum Alloy Strands for Automotive Wires. (2013) Journal of The Electrochemical Society, 160 (11). C569-C575. ISSN 0013-4651

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Official URL: http://dx.doi.org/10.1149/2.080311jes

Abstract

Microstructural states produced by each step of the manufacturing process leading to the production of automotive strand arms in 6101 aluminum alloy (AA6101) for wiring harnesses were investigated in relation to their corrosion behavior in NaCl solution. The observed corrosion morphology,i.e., pitting corrosion or intergranular corrosion, was strongly dependent on the precipitation state, i.e., mainly the presence of intergranular Mg2Si precipitates. A ‘grain size – corrosion resistance’ relationship was also evidenced with an ennoblement of the corrosion potential for wires heavily cold drawn, which were characterized by a nanometric grain size. Dislocation density as well as the homogeneity of alloying element distribution were also found to be relevant parameters for explaining the electrochemical behavior of each microstructural state. Plastic deformation and recrystallization phenomena occurring during the manufacturing process were found to be associated with redistribution of alloying elements, which impeded the formation of intergranular Mg2Si precipitates. Therefore, in the present study, the cold drawing process was found to increase the intergranular corrosion resistance of AA6101.

Item Type:Article
Additional Information:Thanks to Electrochemical Society editor. The original PDF of the article can be found at Journal of The Electrochemical Society website : http://jes.ecsdl.org/
HAL Id:hal-01165102
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > LEONI WIRING SYSTEMS FRANCE (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:18 Jun 2015 11:31

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