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International Journal of Corrosion
Volume 2014, Article ID 838054, 12 pages
Research Article

Assessment of Automotive Coatings Used on Different Metallic Substrates

1Laboratoire de Génie des Matériaux et Environnement (LGME), ENIS, Université de Sfax, B.P.W. 1173-3038, Tunisia
2IUT Mesures Physiques d’Orsay, Université Paris Sud, Plateau du Moulon, 91400 Orsay, France

Received 12 January 2014; Revised 20 March 2014; Accepted 26 March 2014; Published 29 April 2014

Academic Editor: Sebastian Feliu

Copyright © 2014 W. Bensalah 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.


Four epoxy primers commonly used in the automotive industry were applied by gravity pneumatic spray gun over metallic substrates, specifically, steel, electrogalvanized steel, hot-dip galvanized steel, and aluminum. A two-component polyurethane resin was used as topcoat. To evaluate the performance of the different coating systems, the treated panels were submitted to mechanical testing using Persoz hardness, impact resistance, cupping, lattice method, and bending. Tribological properties of different coating systems were conducted using pin on disc machine. Immersion tests were carried out in 5% NaCl and immersion tests in 3% NaOH solutions. Results showed which of the coating systems is more suitable for each substrate in terms of mechanical, tribological, and anticorrosive performance.