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ISRN Corrosion
Volume 2012 (2012), Article ID 916367, 5 pages
http://dx.doi.org/10.5402/2012/916367
Research Article

Kinetics of Pitting Dissolution of Austenitic Stainless Steel 304 in Sodium Chloride Solution

Chemistry Department, Faculty of Science, Alexandria University, Ibrahimia, P.O. Box 426, Alexandria 21321, Egypt

Received 26 July 2012; Accepted 6 September 2012

Academic Editors: S. Umoren and R. Wang

Copyright © 2012 M. Saadawy. 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

The effect of addition of chloride ion on the corrosion of stainless steel 304 in Na2SO4 solution under constant ionic strength conditions at 30°C was studied using potential-time and potentiodynamic polarization techniques and it was found that the addition of chloride ion reduces the growth of protective passive film on the surface and increase corrosion current. The kinetics of dissolution in sodium chloride solution (0.05–0.5M) at 30°C was also studied and the kinetic rate equation was derived and was found to verify the following relationship: CCl where .