Computational and experimental studies on Phenylephrine as anti-corrosion substance of mild steel in acidic medium

Computational and experimental studies on Phenylephrine as a corrosion inhibitor of mild steel in the acidic medium were performed using 1 M HCl. The highest efficiency of 88% was obtained at a 4000 ppm concentration of Phenylephrine at 298 K. Galvanostatic polarization studies revealed that Phenylephrine acted as a mixed type inhibitor. Thermodynamic and kinetic parameters and their effect on inhibition efficiency have also been studied. Adsorption studies revealed that the inhibition process followed Langmuir adsorption isotherm. Monte Carlo simulation approach has been utilized for a thorough theoretical study and data was gathered from quantum chemical studies and Monte Carlo simulation studies. The topographical study was performed by AFM to understand the behavior of inhibitor on the surface of mild steel. (C) 2019 Elsevier B.V. All rights reserved.