Investigation of the Anticorrosive Efficiency of a Heterocyclic Organic Inhibitor on Mild Steel in Acidic Medium

Abstract

Corrosion presents a major challenge for industries like automotive, marine, construction, and oil and gas, as it affects the ability to produce high-quality
products while maintaining low maintenance costs. In this study, NT (1-(4-methyl-1-(2-nitrophenyl)-1H-1,2,3-triazol-5-yl) ethanone) which was used as corrosion
inhibitor and it was investigated by weight loss (WL), potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS), measurements. As
temperature increases, the inhibitory efficiency (IE) decreases, whereas it improves with higher inhibitor dosage. Weight loss (WL) measurements indicate enhanced
adsorption of MNPT on the mild steel surface at elevated inhibitor concentrations, achieving a maximum efficiency of 78.5% at 2ppm and 25 °C. The adsorption
behavior of the investigated derivatives on the mild steel surface was best explained by the Langmuir, Temkin, El-Wady, Freundlich adsorption isotherm. The process
is spontaneous and exothermic, according to the computed values of the adsorption equilibrium constant (Kads) and the standard free energy of adsorption (ΔGads).
NT functions as a mixed-type inhibitor, according to polarization studies.