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Improvement of protection performance of polypyrrole by dopant anions

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Abstract

Electropolymerization of pyrrole on mild steel was carried out in 0.01 m sodium molybdate and 0.1 m pyrrole solution at constant current 1.5 mA cm−2. The film is homogenous and adherent. The corrosion protection of polypyrrole films containing inhibitor anion molybdate as dopant anion was investigated with open circuit potential (OCP) in 0.1 m NaCl. The passivating effect of molybdate was demonstrated. The mobility of anion was investigated by cyclic voltammetry (CV), electrochemical quartz microbalance (EQCM) and electrochemical impedance spectroscopy (EIS) measurements.

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Acknowledgements

The financial support of the Vietnamese Government and the BMBF Project (Germany) are gratefully acknowledged.

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Authors and Affiliations

  1. Department of Chemistry, Institute of Physical Chemistry and Electrochemistry, Dresden University of Technology, Dresden, Germany

    U. Rammelt, L. M. Duc & W. Plieth

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  1. U. Rammelt
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  2. L. M. Duc
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  3. W. Plieth
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Rammelt, U., Duc, L.M. & Plieth, W. Improvement of protection performance of polypyrrole by dopant anions. J Appl Electrochem 35, 1225–1230 (2005). https://doi.org/10.1007/s10800-005-9033-7

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  • DOI: https://doi.org/10.1007/s10800-005-9033-7

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