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N-Methyl-N, N, N-trioctylammonium chloride as novel and green corrosion inhibitor for mild steel in acid chloride medium: Electrochemical, DFT and MD studies

Abstract

In the present work, N-Methyl-N, N, N-trioctylammonium chloride (Aliquat 336) has been evaluated as a green and novel corrosion inhibitor for mild steel in 1M HCl solution using electrochemical impedance spectroscopy (EIS) potentiodynamic polarization (PDP) and chemical, spectroscopic (FTIR and UV-visible) methods. The results show that the Aliquat 336 is an effective corrosion inhibitor and showed the maximum inhibition efficiency of 94.6% at a very low concentration of 4.95 µM. The results of EIS study showed that Aliquat 336 inhibit corrosion by adsorption mechanism. PDP results revealed that Aliquat 336 is a mixed type inhibitor, which predominantly acts as a cathodic inhibitor. The formation of inhibitor film on the metal surface was corroborated by atomic force microscope (AFM) method. The adsorption of Aliquat 336 on mild steel surface obeys Langmuir adsorption isotherm. Quantum chemical calculations (DFT based) and molecular dynamics (MD) simulation studies further corroborated adsorption and inhibition action of Aliquat 336 on the steel surface.

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Publication details

The article was received on 07 Jul 2017, accepted on 09 Oct 2017 and first published on 09 Oct 2017


Article type: Paper
DOI: 10.1039/C7NJ02254A
Citation: New J. Chem., 2017, Accepted Manuscript
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    N-Methyl-N, N, N-trioctylammonium chloride as novel and green corrosion inhibitor for mild steel in acid chloride medium: Electrochemical, DFT and MD studies

    M. A. Quraishi, J. Haque, V. Srivastava, C. Verma, H. Lgaz and R. Salghi, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ02254A

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