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Advances in local mechanoelectrochemistry for detecting pitting corrosion in duplex steels

Published online by Cambridge University Press:  01 December 2004

N. Mary ,
V. Vignal ,
R. Oltra  and
L. Coudreuse
N. Mary
Affiliation:
Laboratoire de Recherches sur la Réactivité des Solides, Unité Mixte de Recherche, 5613 Centre National de la Recherche Scientifique—Université de Bourgogne, 21078 Dijon, France
V. Vignal*
Affiliation:
Laboratoire de Recherches sur la Réactivité des Solides, Unité Mixte de Recherche, 5613 Centre National de la Recherche Scientifique—Université de Bourgogne, 21078 Dijon, France
R. Oltra
Affiliation:
Laboratoire de Recherches sur la Réactivité des Solides, Unité Mixte de Recherche, 5613 Centre National de la Recherche Scientifique—Université de Bourgogne, 21078 Dijon, France
L. Coudreuse
Affiliation:
Industeel, Centre de Recherches des Matériaux du Creusot, 71200 Le Creusot, France
*
a) Address all correspondence to this author. e-mail: vvignal@u-bourgogne.fr
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Abstract

The goal of this study was to demonstrate that a relationship exists between surface stress and pitting corrosion. The surface stress field generated by polishing was first calculated using a thermomechanical model and a finite element code. Pitting corrosion tests performed at the microscale along the austenite/ferrite interface using the electrochemical microcell technique were then analyzed considering the microstructure, and the residual surface stress field calculated numerically under the microcapillary. Mechanical criteria are proposed leading to an enhancement of pitting corrosion of duplex steels.

Keywords

AlloyCorrosionStrength

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Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 12 , December 2004 , pp. 3688 - 3694
Copyright
Copyright © Materials Research Society 2004

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References

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