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Two Dipodal Pyridin-Pyrazol Derivatives As Efficient Inhibitors Of Mild Steel Corrosion In Hcl Solution — Part I: Electrochemical Study

Author

Listed:
  • M. B. CISSE

    (Laboratoire d'Electrochimie, Corrosion et Environnement, Faculté des Sciences, Université Ibn Tofail BP 133, 14000 Kénitra, Morocco)

  • B. ZERGA

    (Laboratoire d'Ingénierie des Matériaux, Modélisation et Environment, Faculté des Sciences Dhar El Mahraz, Université Allal Ben Abdellah, BP 1796, 30000 Atlas, Fès, Morocco)

  • F. El KALAI

    (LCAE-URAC18, Faculté des Sciences, Université Mohammed Premier BP 717, Oujda, Morocco)

  • M. EBN TOUHAMI

    (Laboratoire d'Electrochimie, Corrosion et Environnement, Faculté des Sciences, Université Ibn Tofail BP 133, 14000 Kénitra, Morocco)

  • M. SFAIRA

    (Laboratoire d'Ingénierie des Matériaux, Modélisation et Environment, Faculté des Sciences Dhar El Mahraz, Université Allal Ben Abdellah, BP 1796, 30000 Atlas, Fès, Morocco)

  • M. TALEB

    (Laboratoire d'Ingénierie des Matériaux, Modélisation et Environment, Faculté des Sciences Dhar El Mahraz, Université Allal Ben Abdellah, BP 1796, 30000 Atlas, Fès, Morocco)

  • B. HAMMOUTI

    (LCAE-URAC18, Faculté des Sciences, Université Mohammed Premier BP 717, Oujda, Morocco)

  • N. BENCHAT

    (LCAE-URAC18, Faculté des Sciences, Université Mohammed Premier BP 717, Oujda, Morocco)

  • S. EL KADIRI

    (LCAE-URAC18, Faculté des Sciences, Université Mohammed Premier BP 717, Oujda, Morocco)

  • A. TOUIMI BENJELLOUN

    (Laboratoire d'Ingénierie des Matériaux, Modélisation et Environment, Faculté des Sciences Dhar El Mahraz, Université Allal Ben Abdellah, BP 1796, 30000 Atlas, Fès, Morocco)

Abstract

The effect of two pyridin-pyrazol derivatives, N-[(3,5-dimethyl-1H-pyrazol)methyl]pyridine-2-amine (TB5) and 5-bromo-N-[(3,5-dimethyl-1H-pyrazol)methyl]pyridine-2-amine (TB6), newly synthesized, on the corrosion of mild steel in 1.0 M HCl was investigated by weight-loss and various electrochemical techniques. Results obtained reveal that these pyridin-pyrazol derivatives perform excellently as corrosion inhibitors for mild steel in hydrochloric solution. Polarization curves showed that both TB5 and TB6 are mixed-type inhibitors in acidic medium. A kinetic study of steel in uninhibited and inhibited acid for TB6 was also achieved to provide suitable investigations on corrosion inhibition mechanism in 1.0 M HCl solution. The effect of concentration and temperature on the inhibiting efficiency has been examined. The thermodynamic parameters for both dissolution and adsorption processes were calculated and discussed for TB6. The adsorption of inhibitor TB6 on the mild steel surface obeys the Langmuir adsorption isotherm equation.

Suggested Citation

  • M. B. CISSE & B. ZERGA & F. El KALAI & M. EBN TOUHAMI & M. SFAIRA & M. TALEB & B. HAMMOUTI & N. BENCHAT & S. EL KADIRI & A. TOUIMI BENJELLOUN, 2011. "Two Dipodal Pyridin-Pyrazol Derivatives As Efficient Inhibitors Of Mild Steel Corrosion In Hcl Solution — Part I: Electrochemical Study," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 18(06), pages 303-313.
    • Handle: RePEc:wsi:srlxxx:v:18:y:2011:i:06:n:s0218625x11014783
    DOI: 10.1142/S0218625X11014783
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