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Characterization of intergranular corrosion defects in a 2024 T351 aluminium alloy

Bonfils-Lahovary, Marie-Laëtitia de and Laffont, Lydia and Blanc, Christine Characterization of intergranular corrosion defects in a 2024 T351 aluminium alloy. (2017) Corrosion Science, 119. 60-67. ISSN 0010-938X

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Official URL: https://doi.org/10.1016/j.corsci.2017.02.020

Abstract

Intergranular corrosion defects formed after a 24h immersion in a 1M NaCl solution in a 2024-T351 Al alloy were characterized using a combination of electron microscopy techniques. Results showed the dissolution of intergranular Cu-rich precipitates all along the corroded grain boundaries. Cu species were incorporated inside the amorphous alumina oxide film identified in the corroded grain boundaries leading to the formation of structural defects in the oxide film. A 10–200nm-thin metallic Cu-rich layer was also observed at the oxide/metal interface and at the tip of the intergranular corrosion defect.

Item Type:Article
HAL Id:hal-02497140
Audience (journal):International peer-reviewed journal
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Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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Agence Nationale de la Recherche - ANR (FRANCE)
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Deposited On:03 Mar 2020 13:39

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