Electrochemical and quantum chemical parameters of (-)-(S)-9-flu¬oro-2,3-dihydro-3-methyl-10-(4-methyl-1-pipera-zinyl)-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acidas anti-corrosive agent for API 5L X-52 steel

Authors

  • Fidelis Ebunta Abeng Material and Electrochemistry Research Group, Department of Chemistry, Cross River University of Technology, Calabar P. M. B 1123 and Corrosion and Electrochemistry Research Laboratory, Department of Pure and Applied Chemistry, University of Calaba, P.M.B. 1115 Calabar
  • Magdalene Edet Ikpi Corrosion and Electrochemistry Research Laboratory, Department of Pure and Applied Chemistry, University of Calabar P.M.B. 1115 Calabar
  • Victor E. Okpashi Department of Biochemistry, Cross River University of Technology, Calabar P. M. B.1123
  • Onumashi A. Ushie Department of Chemical Science, Federal University Wukari
  • Mbang E. Obeten Material and Electrochemistry Research group, Department of Chemistry, Cross River University of Technology, Calabar P. M. B 1123

DOI:

https://doi.org/10.5599/jese.744

Keywords:

Corrosion, density functional theory, potentiodynamic polarization, organic inhibitor, adsorption

Abstract

The inhibitive action of (-)-(S)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acid (Levaquin) on API 5L X-52 steel in 2 M HCl solution was investigated using potentiodynamic polarization method and quantum chemical study. Levaquin drug showed good inhibition efficiency of 88 and 95 % at 303 and 323 K, respectively. The results of experimental measurements revealed that Levaquin drug works as a mixed type inhibitor. Langmuir thermodynamic model was tested to describe the mode of inhibitor adsorption on the steel surface. The quantum chemical calculations confirmed the efficacy of Levaquin drug as a corrosion inhibitor.

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Published

19-05-2020

How to Cite

Abeng, F. E., Ikpi, M. E., Okpashi, V. E., Ushie, O. A., & Obeten, M. E. (2020). Electrochemical and quantum chemical parameters of (-)-(S)-9-flu¬oro-2,3-dihydro-3-methyl-10-(4-methyl-1-pipera-zinyl)-7-oxo-7H-pyrido[1,2,3-de]-1,4-benzoxazine-6-carboxylic acidas anti-corrosive agent for API 5L X-52 steel. Journal of Electrochemical Science and Engineering, 10(3), 234–244. https://doi.org/10.5599/jese.744

Issue

Vol. 10 No. 3 (2020)

Section

Electrochemical Science

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