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An interesting and efficient green corrosion inhibitor for aluminium from extracts of Chlomolaena odorata L. in acidic solution

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Abstract

The leaf extracts of Chromolaena odorata L. (LECO) has been studied as a possible source of green inhibitor for corrosion of aluminium in 2 M HCl using gasometric and thermometric techniques at 30 and 60 °C. Results obtained showed that the LECO functioned as an excellent corrosion inhibitor for aluminium in the acidic environment. Inhibition efficiency increased with extract concentration but decreased with temperature. The adsorption of LECO on Al surface is in accord with Langmuir adsorption isotherm. Both kinetic and thermodynamic parameters governing the adsorption process were calculated and discussed. From the experimental results obtained, it can be concluded that LECO which are biodegradable, environmentally benign, and are obtained from a renewable resource with minimal health and safety concerns have the potential to be a cost effective alternative to synthetic corrosion inhibitors. This present study provides new information on the inhibiting characteristics of LECO extract under specified conditions. The environmentally friendly inhibitor could find possible applications in metal surface anodizing and surface coating in industries.

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Acknowledgements

The authors wish to acknowledge the Depertment of Chemistry, University of Uyo, Nigeria, for providing the facilities for the work. Prof. E.E.Ebenso and Dr. S.A. Umoren are also appreciated for helpful suggestions and comments.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, University of Uyo, P.M.B 1017, Uyo, Akwa Ibom, Nigeria

    I. B. Obot

  2. Department of Chemistry, University of Ibadan, Ibadan, Nigeria

    N. O. Obi-Egbedi

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  1. I. B. Obot
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  2. N. O. Obi-Egbedi
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Correspondence to I. B. Obot.

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Obot, I.B., Obi-Egbedi, N.O. An interesting and efficient green corrosion inhibitor for aluminium from extracts of Chlomolaena odorata L. in acidic solution. J Appl Electrochem 40, 1977–1984 (2010). https://doi.org/10.1007/s10800-010-0175-x

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  • DOI: https://doi.org/10.1007/s10800-010-0175-x

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