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Empirical propagation laws of intergranular corrosion defects affecting 2024 T351 alloy in chloride solutions

Augustin, Christel and Andrieu, Eric and Baret-Blanc, Christine and Delfosse, Jérôme and Odemer, Grégory Empirical propagation laws of intergranular corrosion defects affecting 2024 T351 alloy in chloride solutions. (2010) Journal of The Electrochemical Society (JES), vol. 157 (n° 12). pp. C428-C436. ISSN 0013-4651

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Official URL: http://dx.doi.org/10.1149/1.3497297

Abstract

In the present work, a first attempt was made to determine propagation laws of intergranular corrosion defects for Al 2024 T351 in various NaCl solutions as a first step for future predictive modeling of 2024 alloy. In a first step, the effect of chloride concentration on the susceptibility to intergranular corrosion of 2024 alloy was studied using current–potential curves. In a second step, conventional immersion tests were performed in chloride-containing solutions and statistical analysis was carried out to determine the depth of the intergranular corrosion defects, depending on the chloride concentration and on the immersion time. The results were compared to those obtained by measuring the load to failure of precorroded tensile specimens versus preimmersion time in a chloride solution. The latter method was selected to measure the depth of the intergranular defects even though results showed that it was not possible to use it for chloride concentrations higher than 3 M and immersion times longer than 1200 h, considering the chloride concentrations and the durations of immersion studied in this work. Thus, empirical propagation laws are proposed for chloride contents as high as 3 M and immersion times as long as 1200 h.

Item Type:Article
Additional Information:Thanks to Electrochemical Society editor. The definitive version is available at http://www.electrochem.org/ The original PDF of the article can be found at Journal of The Electrochemical Society (JES) website : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JESOAN00015700001200C428000001&idtype=cvips&gifs=yes
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > EADS - Astrium (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Deposited By: Leila Abdelouhab

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