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

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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.

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Acknowledgments

The authors gratefully acknowledge the support of this work by CNPq and FAPERGS.

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Authors and Affiliations

  1. Institute of Chemistry, Federal University of Rio Grande do Sul, Av. Bento Gonçalves 9500, CEP 91501-970, Porto Alegre, RS, Brazil

    Kátia R. L. Castagno, Denise S. Azambuja & Viviane Dalmoro

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  1. Kátia R. L. Castagno
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  2. Denise S. Azambuja
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  3. Viviane Dalmoro
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Correspondence to Denise S. Azambuja.

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Castagno, K.R.L., Azambuja, D.S. & Dalmoro, V. Polypyrrole electropolymerized on aluminum alloy 1100 doped with oxalate and tungstate anions. J Appl Electrochem 39, 93–100 (2009). https://doi.org/10.1007/s10800-008-9640-1

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  • DOI: https://doi.org/10.1007/s10800-008-9640-1

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