Corrosion protection of carbon steel with termoplastic coatings and alkyd resins containing polyaniline as conductive polymer

Abstract:

Protection against corrosion was evaluated for specimens of carbon steel coated with conventional thermoplastic polymers as a blend of poly(methyl methacrylate) with poly(butylmethacrlylate), phenoxy resin and a poly(vinyl chloride-co-vinyl acetate) 90/10 copolymer and compared with an alkyd resin containing 0.2, 0.4 and 0.6% (w/w) of polyaniline, a conductive polymer extensively investigated for its ability to protect metals against aqueous corrosion. Previously, physicochemical and thermal characterization of the polymers was carried out and specimens of carbon steel were used in order to evaluate the protective power of these coatings. Field tests in urban and marine environments were compared with laboratory accelerated tests. Coatings degradation and corrosion products were related to the different mechanism of corrosion processes that take place in thermoplastic and alkyd resins. Equivalent time of …

Año de publicación:

2005

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