Polypyrrole coatings as a treatment for zinc-coated steel surfaces against corrosion

• Tipo: Artigo em Revista Científica Internacional
• Data: 2004

Autores

José Inácio Martins (Autor) FEUP; T. C. Reis (Autor) Outra; M. Bazzaoui (Autor) FEUP; E. A. Bazzaoui (Autor) Outra; L. Martins (Autor) Outra

Revista

Título: Corrosion Science

Vol. 46 Nº 10

Páginas: 2361-2381

ISSN: 0010-938X

Editora: Elsevier

Indexação

ISI Web of Knowledge - 87 Citações

ISI Web of Science

Scopus - 100 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-000-874

DOI: 10.1016/j.corsci.2004.02.006

Abstract (EN): A single-step electropolymerization of pyrrole on zinc-coated steel electrodes in aqueous medium was investigated under several techniques (potentiodynamic, galvanostatic and potentiostatic modes) by using carboxylate salts, such as the citrate, the succinate, the oxalate, the malate and the tartrate. Adherent and homogeneous PPy coatings were obtained only with tartrate counter-ions. The corrosion behaviour of zinc-coated steel electrodes electrochemical modified by PPy films were estimated by open circuit potential and DC polarization in NaCl, HCl and H(2)SO(4) aggressive solutions. The obtained results show that the PPy coatings increase the corrosion potential and reduce the corrosion current. The salt spray test results show that the PPy coating prepared under ultrasonic waves is more resistant than those obtained in normal conditions.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 21