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Journal of Materials Science

, Volume 46, Issue 15, pp 5208–5215 | Cite as

Green corrosion inhibitor from seed extract of Areca catechu for mild steel in hydrochloric acid medium

  • K. P. Vinod KumarEmail author
  • M. Sankara Narayanan Pillai
  • G. Rexin Thusnavis
Article

Abstract

The adsorption and corrosion inhibition effect of acid extract of the seeds of Areca catechu on mild steel in hydrochloric acid medium were analyzed. Inhibition efficiency and thermodynamic parameters such as energy of activation for corrosion reaction of mild steel (E), heat of adsorption of the inhibitor on the metal surface (Q), change in entropy (∆S), and change in free energy (∆G) were obtained using weight-loss data. The nature of adsorption of the inhibitor on the metal surface was verified by plotting Temkin’s adsorption isotherm. Electrochemical parameters were obtained by AC impedance and Tafel polarization studies. Infrared (IR) spectra and scanning electron microscope techniques were also employed to examine the mechanism of corrosion inhibition property. All the results obtained were encouraging and hence bring to light a new alternate, eco-friendly material for the corrosion inhibition of mild steel in acid medium.

Keywords

Corrosion Rate Mild Steel Inhibition Efficiency Mild Steel Corrosion Reaction 

Notes

Acknowledgement

The authors sincerely thank The Director, CECRI, Karaikudi for his kind permission to use lab facilities. Further, the authors are grateful to Dr. S. Muralidharan, Mr. Ravi Shankar, and Mrs. Nalini, CECRI, Karaikudi, Dr. M Shankara Narayana Pillai, Noorul Islam University, Nagercoil and Dr. S. Athimoolam, Anna University, Tirunelveli for rendering their immense support through discussions.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • K. P. Vinod Kumar
    • 1
    Email author
  • M. Sankara Narayanan Pillai
    • 2
  • G. Rexin Thusnavis
    • 3
  1. 1.Department of ChemistryUniversity College of Engineering, Nagercoil, Anna University TirunelveliNagercoilIndia
  2. 2.Department of ChemistryNoorul Islam UniversityNagercoilIndia
  3. 3.Department of ChemistrySt. Xavier’s Catholic College of EngineeringNagercoilIndia

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