Electrochemical impedance spectroscopy investigation of chlorinated rubber-based coatings containing polyaniline as anticorrosion agent

Corrosion protection of mild steel by a newly developed chlorinated rubber (CR)‐based coating system containing the inherently conductive polymer polyaniline (PAni) as an anticorrosion agent was studied. The synthesis of PAni and preparation of CR‐based paint containing this polymer are described he...

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Bibliographic Details
Published in:Materials and corrosion 2010-09, Vol.61 (9), p.790-801
Main Authors: Baldissera, A. F., Freitas, D. B., Ferreira, C. A.
Format: Article
Language:English
Subjects:
Applied sciences
chlorinated rubber
Corrosion
Corrosion environments
electrochemical impedance spectroscopy
Exact sciences and technology
Metals. Metallurgy
Nonmetallic coatings
paint
polyaniline
Production techniques
Surface treatment
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Summary:Corrosion protection of mild steel by a newly developed chlorinated rubber (CR)‐based coating system containing the inherently conductive polymer polyaniline (PAni) as an anticorrosion agent was studied. The synthesis of PAni and preparation of CR‐based paint containing this polymer are described herein. The corrosion behavior of mild steel samples coated with a CR resin, CR/PAni‐EB (emeraldine base), CR/PAni‐ES (emeraldine salt), and CR/DBSA‐doped PAni were investigated in 3.5% NaCl solution. For this purpose, electrochemical impedance spectroscopy and corrosion potential versus time measurements were utilized. It was found that the addition of the two forms of PAni, doped and undoped, to the CR resin increased its corrosion protection efficiency.
ISSN:0947-5117
1521-4176
DOI:10.1002/maco.200905254