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Research on Chemical Intermediates

, Volume 40, Issue 3, pp 1267–1281 | Cite as

Influence of pyridazine derivative on corrosion inhibition of mild steel in acidic media

  • K. Benbouya
  • I. Forsal
  • M. Elbakri
  • T. Anik
  • R. Touir
  • M. Bennajah
  • D. Chebab
  • A. Rochdi
  • B. Mernari
  • M. Ebn Touhami
Article

Abstract

The inhibition behavior of 6-methyl-4,5-dihydropyridazin-3(2H)-one (MDP) on corrosion of mild steel in 1 M HCl and 0.5 M H2SO4 was investigated using weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) measurements. The results indicated that the corrosion inhibition efficiency depends on concentration, immersion time, solution temperature, and the nature of the acidic solutions. It is also noted that MDP is at its the most efficient in 1 M HCl and least in 0.5 M H2SO4. The effect is more pronounced with MDP concentration. It is found that the inhibition efficiency attains 98 % at 5 × 10−3 M in 1 M HCl and 75 % at 5 × 10−2 in 0.5 M H2SO4. Polarization measurements showed that the MDP acts as a mixed inhibitor. EIS diagrams showed that the adsorption of MDP increases the transfer resistance and decreases the capacitance of the interface metal/solution. From the temperature studies, the activation energies in the presence of MDP were found to be superior to those in uninhibited medium. Finally, a mechanism for the adsorption of MDP was proposed and discussed.

Keywords

Corrosion inhibition Mild steel 1 M HCl 0.5 M H2SO4 EIS Potentiodynamic polarization measurements Pyridazine derivative 

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • K. Benbouya
    • 1
  • I. Forsal
    • 1
    • 2
  • M. Elbakri
    • 1
  • T. Anik
    • 1
  • R. Touir
    • 1
  • M. Bennajah
    • 3
  • D. Chebab
    • 1
  • A. Rochdi
    • 1
  • B. Mernari
    • 2
  • M. Ebn Touhami
    • 1
  1. 1.Materials, Electrochemical and Environment Laboratory, Faculty of ScienceIbn Tofail UniversityKenitraMorocco
  2. 2.Coordination and Analytical Chemistry Laboratory, Faculty of ScienceChouaib Doukkali UniversityEl JadidaMorocco
  3. 3.Laboratoire de Génie des Procédés industrielsEcole Nationale de l’industrie minéraleRabatMorocco

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