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ISRN Materials Science
Volume 2013 (2013), Article ID 648246, 7 pages
http://dx.doi.org/10.1155/2013/648246
Research Article

A New Approach in Modifying Polymeric Coatings to Increase Corrosion Resistance Properties

1University of Windsor, 401 Sunset Avenue, Windsor, ON, Canada N9B 3P4
2Materials Engineering Department, Shiraz University, Shiraz, Iran

Received 8 February 2013; Accepted 5 March 2013

Academic Editors: Y. Masuda, N. Uekawa, and R. A. Varin

Copyright © 2013 Alisina Toloei 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

In this study, carbon steel sheets were coated with a modified epoxy coating. The urea-modified montmorillonite clay nanoparticles were added to a DGEBA epoxy resin in different contents and then applied to the surfaces. The corrosion resistance of the coated samples was determined by electrochemical techniques (open circuit potential and linear polarization) in 3.5 wt% NaCl solutions at room temperature and 80°C. Electrochemical impedance spectroscopy (EIS) evaluated the properties of polymer-coated metals and their changes during the exposure to corrosive environments. Scanning electron microscopy (SEM) was used to characterize the coatings. An improvement of protective properties of epoxy coatings with an optimal percentage of the modified clay in comparison with pure epoxy was achieved.