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Proteção contra corrosão da liga de alumínio 2024–T3 por filme de polipirrol eletrodepositado em ácido p-tolueno sulfônico

2017; Volume: 36; Issue: 1 Linguagem: Inglês

10.17563/rbav.v36i1.1059

ISSN

1983-4047

Autores

Alex Fernandes de Souza, Andréa Santos Liu, Liu Yao Cho, Joares Lodovino Reis, Barbara Ramos Ferreira,

Tópico(s)

Electrodeposition and Electroless Coatings

Resumo

Polypyrrole (PPy) is a conducting polymer that has been investigated for corrosion protection of oxidizable metals.Its use presents some advantages as low toxicity, chemical stability and it can be synthetized by chemical and electrochemical methods.In this work, polypyrrole films were electrodeposited by chronoamperometry in p-toluene sulfonic acid.The results of potentiodynamic polarization in aggressive medium of chloride show that the corrosion potential was displaced to values that are more positive when the metal was coated by polypyrrole, indicating anodic protection.Furthermore, the SEM results indicate the formation of compact and homogeneous polypyrrole films on the metallic alloy.

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