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Journal of Applied Electrochemistry

, Volume 39, Issue 7, pp 1075–1079 | Cite as

Piperazine derivatives as inhibitors of the corrosion of mild steel in 3.9 M HCl

  • A. Ousslim
  • K. Bekkouch
  • B. HammoutiEmail author
  • A. Elidrissi
  • A. Aouniti
Original Paper

Abstract

The inhibitory action of two piperazine derivatives, 1-benzyl piperazine (P1) and bis(1-benzylpiperazine) thiuram disulfide (P2) on the corrosion of mild steel in 3.9 M HCl at different concentrations has been investigated in the temperature domain 298–333 K. Both weight loss measurements and potentiodynamic polarization methods showed that P2 was the best inhibitor and that its inhibition efficiency increased with concentration to a value >92% at 10−3 M. Potentiodynamic polarization studies clearly revealed that P2 acts as cathodic-type inhibitor. The activation energy for the corrosion rates was evaluated in the temperature range 298–333 K. Adsorption of P2 on the mild steel surface in 3.9 M HCl followed a Langmuir isotherm model. A physical adsorption phenomenon is proposed.

Keywords

Corrosion Inhibition Piperazine Carbon steel 

Notes

Acknowledgements

The authors thank Dr. J. Harrowfield, Université Louis Pasteur de Strasbourg, for reading of this paper. Prof. Hammouti wishes also to thank Prof. Taieb Chkili, The President of University of Mohamed V, Rabat-Souissi for my proposal to the comité mixte interuniversitaire Franco-Marocain (Programme Volubilis).

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • A. Ousslim
    • 1
  • K. Bekkouch
    • 1
  • B. Hammouti
    • 2
    Email author
  • A. Elidrissi
    • 2
  • A. Aouniti
    • 2
  1. 1.Laboratoire de Chimie Solide Minérale, Faculté des SciencesOujdaMorocco
  2. 2.Laboratoire de Chimie Appliquée & Environnement, Faculté des SciencesOujdaMorocco

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