Investigating the corrosion inhibition potentials of a pyrrolidinium-based ionic liquid on aluminium in acidic medium

Authors

  • Nkuzinna O.C. Department of Chemical Engineering, School of Engineering and Engineering Technology, Federal University of Technology, Owerri, P.M.B.1526,Imo State, Nigeria
  • Onukwuili O.D. Department of Chemical Engineering, Nnamdi Azikiwe University, P. M. B. 5025, Awka, Nigeria

Keywords:

Ionic liquid, Corrosion inhibition, Aluminum, Weight loss, EIS, DFT.

Abstract

The green ionic liquid 1-butyl-1-methylpyrrolidinium bromide [BMPyr]Br has been investigated for its anti-corrosion properties for aluminium in 1MHCl utilizing weight loss, electrochemical and computational techniques. The molecular structure of the obtained [BMPyr]Br was verified and characterized by FTIR spectroscopy. The Langmuir adsorption isotherm accurately described the adsorption behavior of the inhibitor. The corrosion test results from weight loss (WL), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) reveal an impressive corrosion inhibition performance with efficiencies of 91.75%, 80.2% and 89.99% respectively with 45x 10-4M at 313K. The PDP curve suggests that [BMPyr]Br operated as a mixed-type inhibitor. The experimental and theoretical findings (from DFT and MD) are in perfect accord, providing robust evidence that [BMPyr]Br is a highly effective corrosion inhibitor, with all approaches converging to a consistent conclusion.

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Published

2024-06-30

Issue

Vol. 3 No. 2 (2024): UNIZIK Journal of Engineering and Applied Sciences

Section

Articles