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The effect of counter anions on corrosion resistance of steel covered by bi-layered polypyrrole film

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Title: The effect of counter anions on corrosion resistance of steel covered by bi-layered polypyrrole film
Authors: Kowalski, Damian Browse this author
Ueda, Mikito Browse this author
Ohtsuka, Toshiaki Browse this author →KAKEN DB
Keywords: A. Polypyrrole
A. Conductive polymer
C. Corrosion protection
C. Passivation
Issue Date: Aug-2007
Publisher: Elsevier Ltd.
Journal Title: Corrosion Science
Volume: 49
Issue: 8
Start Page: 3442
End Page: 3452
Publisher DOI: 10.1016/j.corsci.2007.03.007
Abstract: The bi-layered polypyrrole (PPy) coatings were investigated for corrosion prevention of a carbon steel. The inner layer was doped with the Keggin structure anions of PMo12O3-40(PMo12) and HPO2-4 anions for stabilization of the passive oxide film at the metal–polymer interface, and the outer layer was doped with four organic anions of dihydroxynaphthalenedisulfonate (DHNDS), naphthalenedisulfonate (NDS), anthraquinonedisulfonate (AnqDS) or dodecylsulfate (DoS) for inhibition of the decomposition and release of PMo12. The corrosion tests were performed in 3.5 wt.% NaCl aqueous solution. The corrosion resistance of the steels covered by the bi-layered PPy films was found in the following order: PPy–PMo12/PPy–DHNDS < PPy–PMo12/PPy–NDS < PPy–PMo12/AnqDS < PPy–PMo12/PPy–DoS. The performance of corrosion protection related to the oxidized state of the polymer was discussed.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: Damian Kowalski

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