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Electrochemical investigations on the inhibition behavior and adsorption isotherm of synthesized di-(Resacetophenone)-1,2-cyclohexandiimine Schiff base on the corrosion of steel in 1 M HCl

  • Physicochemical Problems of Materials Protection
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Abstract

The potential of di-(Resacetophenone)-1,2-cyclohexandiimine as an environmentally friendly corrosion inhibitor for steel has been investigated in 1 M HCl using potentiodynamic polarization, electrochemical impedance spectroscopy and chronoamperometry measurements. All electrochemical measurements suggest that this compound is an excellent corrosion inhibitor for mild steel and the inhibition efficiency increases with the increase in inhibitor concentration. 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 to 65°C. Adsorption of this inhibitor follows the Langmuir adsorption isotherms. The value of Activation energy and the thermodynamic parameters such as ΔH ads, ΔS ads, ΔK 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 inhibitor was examined by scanning electron microscopy (SEM) images.

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Correspondence to I. Danaee.

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Karimi, A., Danaee, I., Eskandari, H. et al. Electrochemical investigations on the inhibition behavior and adsorption isotherm of synthesized di-(Resacetophenone)-1,2-cyclohexandiimine Schiff base on the corrosion of steel in 1 M HCl. Prot Met Phys Chem Surf 51, 899–907 (2015). https://doi.org/10.1134/S2070205115050147

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