Avaliação do copolímero de acrilonitrila e 5-vinil-tetrazol na eficiência de inibição de corrosão química

• Autor(a) principal: Cezário, Wendel Rodrigues
• Data de Publicação: 2010
• 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/1/15662
• topic: Corrosion. Corrosion inhibitors. Tetrazole. Modified polyacrylonitrile; Corrosão. Inibidor de corrosão. Tetrazol. Poliacrilonitrila modificada; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ORGANICA::POLIMEROS E COLOIDES

Corrosion is a process resulting from the action of environment on a given material, causing its deterioration. In general, these deteriorations cause incalculable damage, making the material unsuitable for use. The heterocycles have numerous technological applications and in some cases medical and pharmacological. More recently, these compounds have been used as efficient corrosion inhibitors to protect metals in acidic or saline environments. This Dissertation was conducted on the chemical modification of polyacrylonitrile with the incorporation of tetrazole at different contents (8%, 15%, 30% and 30%). Copolymers of acrylonitrile and 5-vinyl-tetrazole were characterized by infrared spectroscopy and were quantified the respective contents of incorporation by acid-base titration and elemental analysis. The polyacrylonitrile and heterocyclic copolymers were evaluated as corrosion inhibitors for carbon steel, aluminum and brass in aqueous 2 mol/L HCl and 2 mol/L HNO3, resulting in some cases, an efficiency of greater than 75% inhibition, which was statistically significant (P<0.05, ANOVA) for the unmodified polyacrylonitrile