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Comparison of corrosion protection between double strands of polyaniline and poly-o-anisidine with poly(acrylic acid-co-acryl amide) on steel

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Abstract

Double strands of polyaniline (PAn) and poly(o-anisidine) (POAn) with poly(acrylic acid-co-acryl amide) (PAA-co-AA) were successfully prepared on steel as undercoating, by immersion of the pretreated surfaces into a PAn: (PAA-co-AA) and POAn: (PAA-co-AA) saturated DMF solution separately. The undercoatings formed on the steel were characterized by Fourier transform infrared spectroscopy (FTIR) techniques. A commercial paint (Nippon Paint, nonadded Chrome) was used as topcoating. Electrode/electroactive polymer/paint/electrolyte system was studied by electrochemical impedance spectroscopy (EIS). The EIS studies show that during the first 18 days immersion time in 3.5% solution of NaCl, paint/PAn coating has better corrosion resistance than paint/POAn coating while in the final week of immersion time, the pore resistance (R po) and coating capacitance (C c) of paint/POAn are higher and lower than the paint/PAn, respectively.

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Acknowledgments

The authors wish to thank Mojdeh Yeganeh for valuable discussion. This work has been supported by the university of Malaya center for ionic liquids grant no: TA021/2009A and TA010/2010A.

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  1. Department of Chemistry, University of Malaya, Kuala Lumpur, 50603, Malaysia

    M. R. Mahmoudian, W. J. Basirun & Y. Alias

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  1. M. R. Mahmoudian
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  2. W. J. Basirun
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  3. Y. Alias
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Correspondence to M. R. Mahmoudian.

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Mahmoudian, M.R., Basirun, W.J. & Alias, Y. Comparison of corrosion protection between double strands of polyaniline and poly-o-anisidine with poly(acrylic acid-co-acryl amide) on steel. J Coat Technol Res 9, 79–86 (2012). https://doi.org/10.1007/s11998-011-9345-y

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