Avaliação do copolímero de acrilonitrila e 2-vinil-2-oxazolina na eficiência de inibição de corrosão química em meio salino

• Autor(a) principal: Mardirossian, Sergio Sampaio
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/15745
• topic: Corrosion; corrosion inhibitor; heterocyclic polymer; saline medium; carbon steel; aluminum; Corrosão; inibidor de corrosão; 2-oxazolina; poliacrilonitrila modificada; meio salino; aço carbono; alumínio; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA::POLIMEROS E COLOIDES

Corrosive processes, still generate unmeasurable losses to society. There is therefore a constant search for methods that are more economical, efficient and that does not generate impact to the environment. High performance heterocyclic polymers are macromolecules which have been studied as corrosion inhibitors for meeting the premises mentioned above. In this work, a chemical modification of polyacrylonitrile with the incorporation of 2-vinyl-2-oxazoline groups at the theoretical rate of 20% is proposed. The obtained copolymer and not modified polyacrylonitrile were characterized qualitatively by infrared spectroscopy and evaluated as corrosion inhibitors for aluminum and carbon steel in saline medium at 60 ° C. The concentrations used were 20, 50, 100 and 200ppm and checking timeline of: 1, 2, 3 and 4 weeks. The results indicate that the studied polymers showed corrosion inhibiting activity only for carbon steel. For aluminum, blank test showed the lowest rate of corrosion of all tests performed