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Journal of Chemistry
Volume 2013 (2013), Article ID 673961, 8 pages
Research Article

Anticorrosive Performance of Zinc Phosphate Coatings on Mild Steel Developed Using Galvanic Coupling

1Department of Chemistry, Faculty of Engineering and Technology, SRM University, Chennai 603203, India
2Department of Chemistry, Thiru Kolanjiappar Government Arts College, Virudhachalam 606001, India

Received 10 June 2012; Accepted 27 September 2012

Academic Editor: Rafael Garcia-Tenorio

Copyright © 2013 M. Arthanareeswari 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.


The anticorrosive performance of zinc phosphate coatings developed by galvanic coupling technique on mild steel substrates using the cathode materials such as titanium (Ti), copper (Cu), brass (BR), nickel (Ni), and stainless steel (SS) is elucidated in this study. Thermal and chemical stability tests, immersion test in 3.5% NaCl, ARE salt droplet test, and salt spray test were carried out. The study reveals that the mild steel substrates phosphated under galvanically coupled condition showed better corrosion resistance than the one coated without coupling. The open circuit potential (OCP) of phosphated mild steel panels in 3.5% NaCl was found to be a function of phosphate coating weight and porosity of the coating.