Abstract
All paint systems for steel bridges used in Poland need, by the new Polish law of 1996, technical approval of the Road and Bridges Research Institute. In this paper the criteria for the paint systems from laboratory tests will be described. Recent trends in the laboratory tests will also be discussed. A relatively new evaluation method for corrosion damage, i.e. impedance spectroscopy, will be discussed in the framework of international standards in this field. The General Bridge and Road Administration (GDDP) in Poland has defined technical requirements for painting of new and renovated old bridges based on the above-mentioned work and the world trends. These requirements are also presented in this paper. In the recommended paint systems, the “classical” epoxy-polyurethane combinations are supplemented by modern epoxy-polysiloxane and water-borne compositions. For the new bridges, ethylsilicate/epoxy and metallic/epoxy systems are recommended.
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