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Journal of Central South University

, Volume 20, Issue 2, pp 301–311 | Cite as

Inhibition effect of a synthesized N, N′-bis(2-hydroxybenzaldehyde)-1, 3-propandiimine on corrosion of mild steel in HCl

  • O. Ghasemi
  • I. DanaeeEmail author
  • G. R. Rashed
  • M. RashvandAvei
  • M. H. Maddahy
Article

Abstract

The corrosion inhibition of mild steel in 1 mol/L HCl by N, N′-bis (2-hydroxybenzaldehyde)-1, 3-propandiimine (2-HBP) has been investigated by using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and chronoamperometry measurements. The experimental results suggest that this compound is an excellent corrosion inhibitor for mild steel and the inhibition efficiency increases with the increase in inhibitor concentration. Polarization curves reveal that this organic compound is a mixed type inhibitor. The effect of temperature on the corrosion behavior of mild steel with the addition of the Schiff base was studied in the temperature range from 25 °C to 65 °C. The experimentally obtained adsorption isotherms follow the Langmuir equation. Activation and thermodynamic adsorption parameters such as E a, ΔH, ΔS, K ads and ΔG ads were calculated by the corrosion currents at different temperatures and using the adsorption isotherm. The morphology of mild steel surface in the absence and presence of 2-HBP was examined by atomic force microscope (AFM) images.

Key words

corrosion inhibitor Schiff base adsorption Langmuir equation atomic force microscope 

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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • O. Ghasemi
    • 1
  • I. Danaee
    • 1
    Email author
  • G. R. Rashed
    • 1
  • M. RashvandAvei
    • 2
  • M. H. Maddahy
    • 1
  1. 1.Abadan Faculty of Petroleum EngineeringPetroleum University of TechnologyAbadanIran
  2. 2.Department of ChemistryK. N. Toosi University of TechnologyTehranIran

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