Corrosion behaviour of AA 1370 strands for wires: Identification of the critical metallurgical parameters

Rosanne Gravina (1) , Claudie Josse (2) , Bernard Viguier (1) , Adrien Laurino (3) , Joël Alexis (4) , Anthony E. Hughes (5) , Christine Blanc (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 Centre Castaing - Centre de microcaractérisation Raimond Castaing
3 LEONI WIRING SYSTEMS FRANCE (FRANCE)
4 LGP - Laboratoire Génie de Production
5 CSIRO - Commonwealth Scientific and Industrial Research Organisation [Canberra]

The corrosion behaviour of AA 1370 in different metallurgical states was studied in chloride-containing sulphate solutions. The microstructures of a rod, a deformed strand and an annealed strand constitutive of wires were examined using scanning electron microscopy, transmission electron microscopy and electron backscattered diffraction. Results offered evidence for the ultra-fine grain size, high density of interfaces and high level of misorientation of the interfaces as relevant explanations for the low corrosion resistance of the deformed strand compared to the rod and the annealed strand.

Mots clés: A. Alloy; A. Aluminium; B. TEM; B. Polarisation; C. Interfaces

Domaines: Génie des procédés; Matériaux

Rosanne Gravina, Claudie Josse, Bernard Viguier, Adrien Laurino, Joël Alexis, et al.. Corrosion behaviour of AA 1370 strands for wires: Identification of the critical metallurgical parameters. Corrosion Science, 2018, 134, pp.112-121. ⟨10.1016/j.corsci.2018.02.016⟩. ⟨hal-01989439⟩