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Electrochemical corrosion resistance performance of sustainable resource-based nanoconducting polymer composites in alkaline medium

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Abstract

The corrosion resistance performance of poly (otoluidine) (POT)-dispersed castor oil-polyurethane, (COPU) nanocomposite coatings, POT/COPU, with three different compositions (i.e. 0.25, 0.5 and 1.0 wt%) in alkaline medium is studied. The coatings are applied on mild steel specimens by brushing. Corrosion resistance behaviour of these coatings is investigated using potentiodynamic polarization measurements, electrochemical impedance spectroscopy (EIS) and by weight loss. The morphological behaviour of corroded and uncorroded coated specimens is investigated by scanning electron microscopy (SEM). It is interesting to report that the presence of conducting polymer nanoparticles in POT/COPU coatings suppresses the saponification of COPU in an alkaline environment. These investigations show that the dispersion of POT in COPU remarkably improves the corrosion resistance performance of COPU in alkaline media. POT/COPU (1.0 wt%) coatings have potential as anticorrosive-coating materials in alkaline media at higher pH. These coatings have a higher resistance to alkaline medium in comparison to other compositions.

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Acknowledgments

The authors are thankful to the Naval Research Board (NRB) for providing the financial assistance, vide sanction no DNRD/05/4003/155 DATED 03/10/2008.

Dr. Mohammad Kashif is also thankful to CSIR (New Delhi, India) for financial support through Research Associateship (RA) against Grant No. 05/466 (0160)/2 K13-EMR-I.

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Authors and Affiliations

  1. Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi, 110025, India

    Mohammad Kashif, Nazir Ahmad & Sharif Ahmad

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  1. Mohammad Kashif
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  2. Nazir Ahmad
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  3. Sharif Ahmad
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Correspondence to Sharif Ahmad.

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Kashif, M., Ahmad, N. & Ahmad, S. Electrochemical corrosion resistance performance of sustainable resource-based nanoconducting polymer composites in alkaline medium. J Solid State Electrochem 18, 1855–1867 (2014). https://doi.org/10.1007/s10008-014-2424-0

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  • DOI: https://doi.org/10.1007/s10008-014-2424-0

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