Chemical Adsorption Data’s, Temperature Effect and Structural Properties of Artemether-Lumefantrine Corrosion Inhibition Properties on Structural Steel in 0.62M NaCl

Abstract:

Chemical and marine components are faced with corrosion resulting from salty media in an application, which ends up in serious catastrophe. In an attempt to provide and curtail this challenge of toxic use of inorganic inhibitors, properties of Artemether/Lumefantrine was examined as a corrosion inhibitor for mild steel in 0.625M sodium chloride (NaCl) medium. The corrosion propagation under different inhibitor concentrations between 0-20 ml and the temperature difference of 298-323K was examined using linear potentiodynamic polarisation and open circuit potential. The structural pitting evolution was done using a scanning electron microscope (SEM) and energy-dispersive x-ray spectroscopy (EDS) analyses. From the data, the activation energy of the corrosion reaction increased with increasing inhibitor concentration, suggesting that it inhibits corrosion by increasing the energy required to initiate the corrosion reaction. The Gibbs free energies of adsorption fall within the range of-10.08 and-13.87 kJ/mol, which is greater than-20 kJ/mol; thus, the artemether-lumefantrine inhibitor exhibited physical type adsorption. The values of the free energy of adsorption were all negative. The Langmuir Isotherm seems to perform exceptionally well with a correlation efficiency of 0.975 against all other isotherm fits.

• Periodical: Key Engineering Materials (Volume 886)
• Pages: 143-155
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.886.143
• Online since: May 2021
• Authors: Olayemi Abosede Odunlami*, Ojo Sunday Issac Fayomi, Samuel Tijani, Juwon Ojo Fayomi
• Keywords: Adsorption, Chemical, Component, Microstructure, Temperature

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