Corrosion protection of carbon steel by thin films of poly (3-alkyl thiophenes) in 0.5 M H2SO4
Por:
Medrano-Vaca M.G., Gonzalez-Rodriguez J.G., Nicho M.E., Casales M., Salinas-Bravo V.M.
Publicada:
20 mar 2008
Resumen:
Poly(3-octyl thiophene) (P3OT) and poly(3-hexylthiophene) (P3HT) dissolved in toluene were deposited onto 1018 carbon steel and corroded in 0.5 M H2SO4 center dot P3OT and P3HT films were chemically deposited by drop casting onto 1018-type carbon steel with two surface finishing, i.e. abraded with 600-emery paper and with alumina (Al2O3) particles of 1.0 mu m in diameter (mirror finish). Their corrosion resistance was estimated by using potentiodynamic polarization curves, linear polarization resistance (LPR), and electrochemical impedance spectroscopy, EIS, techniques. In all cases, polymeric films protected the substrate against corrosion, but the protection was improved if the surface was polished with Al2O3 particles of 1.0 mu m in diameter. The polymer which gave the best protection was P3HT because the amount of defects was much lower than that for the P3OT films. The polymers did not act only as a barrier layer against aggressive environment, but they improved the passive film p
Filiaciones:
Medrano-Vaca M.G.:
Centro de Investigación en Ingeniería y Ciencias Aplicadas, UAEMor, Av. Universidad 1001, Col. Chamilpa, 62209-Cuernavaca, Morelos, Mexico
Instituto de Investigaciones Eléctricas, Av. Reforma # 113, 62490 Temixco, Morelos, Mexico
Gonzalez-Rodriguez J.G.:
Centro de Investigación en Ingeniería y Ciencias Aplicadas, UAEMor, Av. Universidad 1001, Col. Chamilpa, 62209-Cuernavaca, Morelos, Mexico
Instituto de Investigaciones Eléctricas, Av. Reforma # 113, 62490 Temixco, Morelos, Mexico
Nicho M.E.:
Centro de Investigación en Ingeniería y Ciencias Aplicadas, UAEMor, Av. Universidad 1001, Col. Chamilpa, 62209-Cuernavaca, Morelos, Mexico
Instituto de Investigaciones Eléctricas, Av. Reforma # 113, 62490 Temixco, Morelos, Mexico
Casales M.:
Univ Nacl Autonoma Mexico, Inst Ciencias Fisicas, Cuernavaca 62191, Morelos, Mexico
Salinas-Bravo V.M.:
Univ Nacl Autonoma Mexico, Inst Ciencias Fisicas, Cuernavaca 62191, Morelos, Mexico
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