Prop-2-en-1-one Derivatives as Corrosion Inhibitors for Copper in 1 M HNO₃

摘要

Inhibition of corrosion of copper in nitric acid by prop-2-en-1-one derivatives has been studied usingweight loss and electrochemical measurements. It was found that the prop-2-en-1-one derivatives actas a good corrosion inhibitor for copper in all concentrations of the prop-2-en-1-one derivatives. Theinhibition action depends on the concentration of the prop-2-en-1-one derivatives in the acid solution.Results for weight loss and electrochemical measurements indicate that inhibition efficiency increaseswith increasing inhibitor concentration. Polarization curves revealed that these compounds are mixedtype inhibitors. The adsorption of prop-2-en-1-one derivatives on the surface of the copper specimensobeys Temkin adsorption isotherm. Some thermodynamic and kinetic parameters for the corrosionprocess were estimated, and the values support the results obtained. Some quantum chemicalparameters and the Mulliken charge densities for prop-2-en-1-one derivatives were calculated by theDFT (density function theory) semi-empirical method to provide further insight into the mechanism ofinhibition of the corrosion process.