Table of Contents
ISRN Corrosion
Volume 2012 (2012), Article ID 764032, 6 pages
http://dx.doi.org/10.5402/2012/764032
Research Article

Modification of the Corrosion Properties of a Model Fe-8Ni-18Cr Steel Resulting from Plastic Deformation and Evaluated by Impedance Spectroscopy

1Lycée Henri Loritz, 29 Rue des Jardiniers, 54000 Nancy, France
2Institut Jean Lamour, University of Lorraine, Boulevard des Aiguillettes, B.P. 70239, 54506 Vandoeuvre-lès-Nancy, France

Received 30 August 2012; Accepted 14 September 2012

Academic Editors: M. Aparicio, G. Marginean, Q. Qu, and C. Valentini

Copyright © 2012 Pierre-Yves Girardin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A model {minor elements}-free Fe-8Ni-18Cr alloy (wt%) was elaborated by foundry, then cut in several cylindrical parts which were subjected to compression tests leading to different plastic deformation rates. The axis surface of the obtained samples were characterized in corrosion by impedance spectroscopy in an acid sulphuric solution. The obtained EIS results were plotted in the complex plan of Nyquist and the diagrams were all semicircular but with an average radius decreasing when the deformation rate increased. The plastic deformation obviously induced a decrease in charge transfer resistance, revealing a detrimental effect of the corrosion behaviour as the most often reported in studies involving stationary methods of electrochemical characterization of corrosion. It was also found that the capacitance tends to increase with the rate of plastic deformation by compression.