Effect of Incorporation of Inhibitor Loaded Mesoporous Silica on the Corrosion Behavior of Epoxy Coatings

Document Type: Research Paper

Authors

1 Corrosion Laboratory, School of Metallurgy and Materials Engineering, University College of Engineering, University of Tehran, North Kargar, Tehran, P.O. Box 11365-4563, Iran.

2 a Corrosion Laboratory, School of Metallurgy and Materials Engineering, University College of Engineering, University of Tehran, North Kargar, Tehran, P.O. Box 11365-4563, Iran.

3 Department of Materials Engineering, Faculty of Engineering, Shahrekord University, P. O. Box 115, Shahrekord, Iran.

Abstract

In this research, mesoporous silica was applied as the host of corrosion inhibitor (molybdate). The loaded mesoporous silica was dispersed in an epoxy matrix. The composite was then coated on the mild steel plate. Results showed that the corrosion resistance of the scratched epoxy/mesoporous silica loaded by molybdate was better than the one without molybdate or neat epoxy. On the other hand, EDX and FTIR studies showed the release of corrosion inhibitor in the scratched zone. It was due to pH-sensitive release of corrosion inhibitor in the aggressive media. Also, XRD data showed the presence of Mo compounds on the surface of steel.

Keywords