Journal of Applied Electrochemistry

, Volume 39, Issue 1, pp 93–100 | Cite as

Polypyrrole electropolymerized on aluminum alloy 1100 doped with oxalate and tungstate anions

  • Kátia R. L. Castagno
  • Denise S. Azambuja
  • Viviane Dalmoro
Original Paper

Abstract

Polypyrrole films doped with oxalic acid and tungstate were potentiostatically electropolymerized on aluminum alloy 1100. Two statistical factorial designs (fractional and complete) were used to study the influence of the synthesis variables on the film performance against corrosion. Corrosion protection of the polypyrrole films doped with oxalate and tungstate anions (PPy/OXA/W) on the aluminum alloy was evaluated by potentiometric and electrochemical impedance spectroscopy (EIS) measurements in a 0.05 mol L−1 NaCl solution. The results obtained showed that the best performance against corrosion was detected with the PPy/OXA/W film synthesized at 1.0 V, 1.5 C in 0.2 mol L−1 pyrrole, 0.1 mol L−1 oxalic acid and 0.05 mol L−1 sodium tungstate solutions provide a protective effect against corrosion.

Keywords

Polypyrrole Aluminum Tungstate Corrosion 

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Kátia R. L. Castagno
    • 1
  • Denise S. Azambuja
    • 1
  • Viviane Dalmoro
    • 1
  1. 1.Institute of ChemistryFederal University of Rio Grande do SulPorto AlegreBrazil

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