Study of the pigment type effect on the corrosion behaviour of epoxy painted steel/ sea water systems

D.M. Santágata (D.M. Santágata is a CIC Fellow, at CIDEPINT, Centro de Investigación y Desarrollo en Tecnología de Pinturas. (CIC‐CONICET), La Plata, Argentina.)
P.R. Seré (P.R. Seré is a CIC Fellow, CIDEPINT, Centro de Investigación y Desarrollo en Tecnología de Pinturas. (CIC‐CONICET), La Plata, Argentina.)
S. Hornus Sack (S. Hornus Sack is Ad‐Honorem Assistant at CIDEPINT, Centro de Investigación y Desarrollo en Tecnología de Pinturas. (CIC‐CONICET), La Plata, Argentina.)
C.I. Elsner (C.I. Elsner is CONICET Researcher at CIDEPINT, Centro de Investigación y Desarrollo en Tecnología de Pinturas. (CIC‐CONICET), La Plata, Argentina.)
G. Mendivil (G. Mendivil is CONICET Technician at CIDEPINT, Centro de Investigación y Desarrollo en Tecnología de Pinturas. (CIC‐CONICET), La Plata, Argentina.)
A.R. Di Sarli (A.R. Di Sarli is CIC Researcher, at CIDEPINT, Centro de Investigación y Desarrollo en Tecnología de Pinturas. (CIC‐CONICET), La Plata, Argentina.)

Pigment & Resin Technology

ISSN: 0369-9420

Publication date: 1 December 2000

Abstract

The effect of different kind of pigments on the corrosion resistance properties of an epoxy paint has been investigated using electrochemical impedance spectroscopy and open circuit potential measurements. Painted naval steel samples were studied during the exposure to artificial sea water. The epoxy paint coatings were prepared employing red lead, zinc, red iron oxide or titanium dioxide as pigment with 0.8 of PVC/CPVC ratio. From the EIS and corrosion potential data analyis was found that the anticorrosive protection given by an anticorrosive (pigmented with red lead) and a top coat (pigmented with red iron oxide) epoxy painting scheme was both more lasting and more effective. This was attributed to the fact that both the effective adhesion provided by the chemical bonding between the steel surface and the epoxy paint groups and the constant high barrier effect afforded by this type of top coat were a perfect complement for the high corrosion inhibitive capacity of the red lead pigment.

Keywords

Citation

Santágata, D., Seré, P., Hornus Sack, S., Elsner, C., Mendivil, G. and Di Sarli, A. (2000), "Study of the pigment type effect on the corrosion behaviour of epoxy painted steel/ sea water systems", Pigment & Resin Technology, Vol. 29 No. 6, pp. 356-363. https://doi.org/10.1108/03699420010362500

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MCB UP Ltd

Copyright © 2000, MCB UP Limited

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