Electrochemical behavior of carbon steel pre-treated with an organo functional bis-silane filled with copper phthalocyanine

Autor(es)

Patricia H. Suegama ^[1] ; Idalina V. Aoki ^[2]

Afiliação do(s) autor(es)

^[1] Universidade de São Paulo. Escola Politécnica. Departamento de Engenharia Química - Brasil

^[2] Universidade de São Paulo. Escola Politécnica. Departamento de Engenharia Química - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 19, n. 4, p. 744-754, 2008-00-00.

Resumo

The bis-[trimethoxysilylpropyl]amine (BTSPA) film filled with copper phthalocyanine (Cu-Ph) was prepared by adding different concentrations of copper phthalocyanine - Cu-Ph and deposited on a carbon steel substrate using 120 ºC and 150 ºC as curing temperatures. For samples cured at 150 ºC a second layer was also deposited. The electrochemical behavior of carbon steel coated with BTSPA filled with Cu-Ph was studied by electrochemical measurements, electrochemical impedance spectroscopy (EIS) and polarization curves, in aerated 0.1 mol L-1 NaCl solution. Physical and chemical characterization was made by thermogravimetric analysis (TGA), scanning electron microscopy, contact angle measurements and infrared spectroscopy. TGA showed no decomposition of Cu-Ph during the curing process. Cu-Ph added into the silane film showed a strong influence on its corrosion resistance, mainly when the samples are cured at 150 ºC. The results showed that lower inhibitor concentrations led to a higher corrosion resistance and the second layer increased by one order of magnitude the corrosion resistance. (AU)

• Processo FAPESP: 05/51851-4 - Nanocompósitos à base de polissilanos aditivados como pré-tratamentos protetores contra corrosão para aço carbono
• Beneficiário: Patricia Hatsue Suegama
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado