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Release mechanism of electrodeposited polypyrrole doped with corrosion inhibitor anions |
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| Authors: | Grazyna Paliwoda-Porebska Michael Rohwerder Martin Stratmann Ursula Rammelt Le Minh Duc Waldfried Plieth |
| Affiliation: | (1) Max-Planck-Institut fuer Eisenforschung, Max-Planck-Str. 1, Duesseldorf, Germany;(2) Department of Chemistry, Institute of Physical Chemistry and Electrochemistry, Dresden University of Technology, Mommsenstrasse 13, 01062 Dresden, Germany |
| Abstract: | Scanning Kelvin probe and electrochemical impedance spectroscopy were used to study the release behaviour of inhibitor anions doped in polypyrrole film (e.g. molybdate, 3-nitro salicylate). The polypyrrole coatings were formed on mild steel and zinc substrates in aqueous solution. It was shown that the release behaviour of the molybdate and 3-nitro salicylate anions depends on the size of cations in the electrolyte. The delamination is determined with the migration and incorporation of small cations. |
| Keywords: | Polypyrrole Corrosion inhibitors Release system Scanning Kelvin probe (SKP) Electrochemical impedance spectroscopy (EIS) |
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