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Intergranular Corrosion of 2024 Alloy in Chloride Solutions

Augustin, Christel and Andrieu, Eric and Blanc, Christine and Mankowski, Georges and Delfosse, Jérôme Intergranular Corrosion of 2024 Alloy in Chloride Solutions. (2007) Journal of The Electrochemical Society (JES), 154 (11). C637-C644. ISSN 0013-4651

(Document in English)

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Official URL: http://dx.doi.org/10.1149/1.2778224


Experiments were performed to determine the propagation kinetics of intergranular corrosion on 2024 aluminum alloy immersed in 1 and 3 M chloride solutions. Tests consisting of immersion in a corrosive solution followed by optical observations on sectioned samples were carried out. This method was found to be time consuming and led to a lack of reproducibility due to the random nature of the corrosion attacks. Another method proved to be more efficient; it consisted of measuring the load to failure on precorroded tensile specimens vs preimmersion time in an aggressive environment. This method was found to allow the mean depth of the corrosion defects to be determined. Further, in 1 and 3 M chloride solution, intergranular corrosion led to the formation of a nonbearing zone, the thickness of which was equal to the mean depth of the corrosion defects. This corroded zone explained the premature failure of the specimens when a uniaxial tensile stress was applied.

Item Type:Article
Additional Information:Thanks to Electrochemical Society editor. The definitive version is available at http://www.scitation.aip.org The original PDF of the article can be found at Journal of The Electrochemical Society website : http://www.ecsdl.org/JES/
HAL Id:hal-00806063
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > EADS N.V. (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Laboratory name:
Deposited On:05 May 2009 08:06

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