What is it about?
The present study aimed to evaluate the inhibition effect of an organic compound, namely, (E)-N'-(2-hydroxybenzylidene)isonicotinohydrazide (BIH), for carbon steel corrosion in a 1.0 M HCl solution, by using weight loss (WL), potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). Results show that BIH is a good inhibitor, and the percentage of inhibition efficiency increases on its higher concentrations. The maximum inhibition efficiency of 94% was obtained at 5×10-3 M. Polarization studies revealed that the BIH compound acts as a mixed type inhibitor. EIS showed that increasing the concentration of the inhibitor led to an increase in the charge transfer resistance and a decrease in the double layer capacitance. It was found that the adsorption of this compound obeyed the Langmuir adsorption isotherm. The associated activation energies and thermodynamic parameters of the adsorption process were evaluated and discussed. The temperature effect was studied in the range from 303 to 333 K. In addition, quantum chemical calculations based on the density function theory (DFT) and Monte Carlo simulations were done to support the experimental results.
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Why is it important?
Synthesis of inhibitor is simple, cost efficient and scalable.
Perspectives
Our related publications: (i) H. Lgaz, K. S. Bhat, R. Salghi, Shubhalaxmi, S. Jodeh, M. Algarra, B. Hammouti, A. Essamri, Insights into corrosion inhibition behavior of three chalcone derivatives for mild steel in hydrochloric acid solution, J. Mol. Liq, Vol 238, 71-83, 2017. (ii) H. Lgaz, R. Salghi, K. S. Bhat, A. Chaouiki, Shubhalaxmi, S. Jodeh, Correlated Experimental and Theoretical Study on Inhibition Behavior of Novel Quinoline Derivatives for the Corrosion of Mild Steel in Hydrochloric Acid Solution, J. Mol. Liq., 244, 154-168, 2017. (iii) H. Lgaz, R. Salghi, A. Chaouiki, Shubhalaxmi, S. Jodeh, K. S. Bhat, Pyrazoline derivatives as possible Corrosion Inhibitors for Mild Steel in Acidic Media: A combined Experimental and Theoretical approach, Cogent Engg, 2018, Article id: 1441585 (17 pages). (iv) A. Chaouiki, H. Lgaz, Ill-Min Chung, I. H. Ali, S. L. Gaonkar, K. S. Bhat, R. Salghi, H. Oudda and M. I. Khan, Understanding Corrosion Inhibition of Mild Steel in Acid Medium by new benzonitriles: Insights from Experimental and Computational Studies, J Mol. Liq., 266, 603-616, 2018. (v) A. Chaouiki, H. Lgaz, S. Zehra, Rachid Salghi, Ill-Min Chung, Y. E. Aoufir, K. Subrahmanya Bhat, I. H. Ali, S. L. Gaonkar, M. I. Khan, H. Oudda, Exploring Deep Insights into the Interaction Mechanism of a Quinazoline Derivative with Mild Steel in HCl: Electrochemical, DFT, and Molecular Dynamic Simulation Studies, J. Adhesion Sci. Tech., 33(9), 921-944, 2019.
Dr Subrahmanya Bhat K
Manipal Institute Of Technology, Manipal Academy of Higher Education
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This page is a summary of: New Benzohydrazide Derivative as Corrosion Inhibitor for Carbon Steel in a 1.0 M HCl Solution: Electrochemical, DFT and Monte Carlo Simulation Studies, Portugaliae Electrochimica Acta, January 2019, Portuguese Society of Electrochemistry,
DOI: 10.4152/pea.201903147.
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