Fagonia arabica extract as a safe‐environment green corrosion inhibitor for Cu in HNO3 solution

Abstract

AbstractThe effect of Fagonia arabica as corrosion inhibitor for Cu in nitric acid solution was studied utilizing mass loss technique, potentiodynamic polarization measurement, electrochemical impedance spectroscopy method, and scanning electron microscopy (SEM); the inhibition efficiency was found to increase with increase in the concentration of inhibitor; the inhibitive effect of this inhibitor was explained based on adsorption metal surface, the adsorption effect follows Flory‐Huggins adsorption isotherm. The corrosion rate was calculated; the results revealed that F. arabica has good inhibition effect on Cu. The surface morphology of Cu metal was examined by employing various techniques such as atomic force microscopy (AFM) and SEM. The AFM results observed greater inhibition efficiency of F. arabica for Cu dissolution in the acid corrosive environment. The parameters for the corrosion procedure have also been determined and discussed.