Electrochemical and mechanical properties of polypyrrole coatings on steel

The influence of preparation method on the morphology, mechanical properties and the behaviour against corrosion of polypyrrole films was investigated. The best mechanical properties (Universal microhardness, Young's modulus and elastic recovery) have been those corresponding to a coating obtained at constant current and thermally treated at 80degreesC during 1 day. The behaviour of these films performed in a corrosion media in quiescent and no quiescent solution has demonstrated that the samples with the best mechanical properties also had as the best anticorrosive protection, especially in the case of quincest solutions. (C) 2004 Elsevier Ltd. All rights reserved.