Atmospheric Corrosion Behavior of Paint Systems Applied on Weathered Hot Dip Galvanized Steel

By D. de la Fuente, M. Morcillo , J. Simancas, L.S. Hernandez, J.L. Ruiz

The durability of a paint coating applied on a galvanized steel surface which has been exposed for a certain time to the atmosphere depends on the aggressiveness of the atmosphere, the preparation of the weathered surface prior to painting, and the type of coating applied. This work presents the results of an atmos­pheric corrosion study carried out over 11 years in three Spanish atmospheres of highly different de­grees of aggressiveness (Madrid, Bilbao, and Ten­erife), applying eight paint coatings on galvanized steel weathered in different conditions and using different methods to prepare the aged metallic sur­face prior to painting.