Table of Contents
ISRN Corrosion
Volume 2013, Article ID 464710, 9 pages
http://dx.doi.org/10.1155/2013/464710
Research Article

Corrosion Study of Powder-Coated Galvanised Steel

R&D and Scientific Services, TATA Steel Ltd., Jamshedpur 831001, India

Received 31 December 2012; Accepted 3 February 2013

Academic Editors: C.-H. Hsu and S. Umoren

Copyright © 2013 Manish Kumar Bhadu 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 general, steel is protected from corrosive environments by conversion coatings, that is, phosphating, chromating, and so forth, and then followed by different layers of paints. Nowadays, strict pollution laws and regulations are creating significant challenges for coating experts to develop an environmentally friendly product. Powder coatings have demonstrated their ability as alternative to traditional solvent-borne coatings. In the present work, polyester-based two coating systems have been investigated and their performances have been evaluated for surface topographical properties by Scanning electron microscope (SEM), and energy dispersive spectrometry (EDX), accelerated corrosion resistance by salt spray test, and impedance property by electrochemical impedance spectroscopy. Coating adhesion with the steel and hardness were evaluated by bond strength, cross cut adhesion, and pencil hardness. This paper explains the results and performance of the coatings by the above two systems.