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Solid State Conductivity of Optimized Polypyrrole Coatings on Iron Obtained from Aqueous Sodium Salicylate Solution Determined by Impedance Spectroscopy
Abstract
In this work the optimization procedure for corrosion resistance, surface analysis and electrical properties of PPy-Fe electrodes have been examined. Polypyrrole (PPy) film was electrochemically synthesized in a one step process from an aqueous solution of sodium salicylate and pyrrole with certain concentrations, different parameters and type of polymerization process. The PPy-Fe electrodes were analyzed using scanning electron microscopy (SEM) and x-ray photoelectron spectroscopy (XPS). The adhesion of PPy was tested by applying ASTM sellotape test which proved that PPy coatings are strongly adherent to the iron surface. Potentiodynamic polarization in 0.1M NaCl showed improvement of corrosion protection properties of coated PPy-Fe sample compared to the bare iron. The degree of improvement depends on the concentration of sodium salicylate and pyrrole, deposition time, deposition techniques and its parameters, and on the pH of solution. Impedance spectroscopy (IS) measurements showed different impedance behavior and conductivity of PPy depending on the current density at which the polymer was synthesized.
Authors (4)
-
Ferdinand Singer
- . .
-
Sannakaisa Virtanen
- . .
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
International Journal of Electrochemical Science
no. 9,
pages 7997 - 8010,
ISSN: 1452-3981 - Language:
- English
- Publication year:
- 2014
- Bibliographic description:
- Cysewska K., Singer F., Jasiński P., Virtanen S.: Solid State Conductivity of Optimized Polypyrrole Coatings on Iron Obtained from Aqueous Sodium Salicylate Solution Determined by Impedance Spectroscopy// International Journal of Electrochemical Science. -Vol. 9, (2014), s.7997-8010
- Verified by:
- Gdańsk University of Technology
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