Table of Contents
Journal of Coatings
Volume 2014 (2014), Article ID 574028, 15 pages
http://dx.doi.org/10.1155/2014/574028
Research Article

Development of Epoxy Based Surface Tolerant Coating Improvised with Zn Dust and MIO on Steel Surfaces

1TATA Steel Ltd., Jamshedpur, India
2IIT Bombay, India
3Stanvac-Superon Group, Gurgaon, India

Received 16 November 2013; Revised 28 January 2014; Accepted 18 February 2014; Published 3 April 2014

Academic Editor: Fahmina Zafar

Copyright © 2014 Rachna Jain 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

Couple of high strength and flexible surface tolerant coatings were designed for oil contaminated, rusty, and minimally prepared steel surfaces. These coatings are to have strong interfacial adhesion due to low surface tension and sustain more than 5 MPa pull out force consistently. The effect of optimized concentration of zinc dust and micaceous iron oxide (MIO) as pigments is evaluated for these surface tolerant coating systems. It has been noticed that the presence of these two ingredients has enhanced corrosion resistance more than several times as compared to commercially available coating systems. The corrosion simulation test in 3.5 wt.% NaCl has evident for significant improvement in terms of delaying blistering and delamination. The high pore resistance () indicates the slow migration of ions and water into the substrate and coating interface, which could be the reason of the improvement in corrosion process.