Application of Metronidazole Drug as Corrosion Inhibitor of Mild Steel in Hydrochloric Acid Medium

Authors

  • Udeh B. C. Department of Chemical Engineering, Enugu State University of Science and Technology, Enugu, Nigeria
  • Onukwuli O. D. Department of Chemical Engineering, Nnamdi Azikiwe University, Awka, Nigeria
  • Omotioma M. Department of Chemical Engineering, Enugu State University of Science and Technology, Enugu, Nigeria

Keywords:

Metronidazole, Corrosion, Mild Steel, Hydrochloric acid

Abstract

Abstract
Application of metronidazole drug as corrosion inhibitor of mild steel in 1M hydrochloric acid medium is presented.
Gravimetric, potentiodynamic polarization, electrochemical impedance spectroscopy and thermometric techniques
were used for the study. Molecular species and functional groups of the metronidazole drug were analyzed by gas
chromatography mass spectrophotometer (GCMS) and Fourier transform infrared (FTIR) spectroscopy respectively.
Based on response surface methodology, the inhibition efficiency was optimized by central composite design of
Design Expert Software Version 12. Scanning electron microscopic analysis was used to reveal texture of the mild
steel surface. Analyses of the results showed that metronidazole drug contains heterocyclic compounds and
heteroatoms of nitrogen and oxygen, which makes it suitable for the corrosion inhibition function. Major
constituents of metronidazole drug include metronidazole, 9-octadecenoic acid and methyl ester.

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Published

2021-06-02

Issue

Vol. 18 No. 1 (2021): Journal of Engineering and Applied Sciences

Section

Articles