Artemisia Mesatlantica essential oil as green inhibitor for carbon steel corrosion in 1 M HCl solution: Electrochemical and XPS investigations

Artemisia Mesatlantica essential oil as green inhibitor for carbon steel corrosion in 1 M HCl solution: Electrochemical and XPS investigations

The present work is devoted to the study of Artemisia Mesatlantica essential oil (AMEO) as greencorrosion inhibitor to afford the protection of carbon steel in 1 M HCl medium at 30 8C. Weight lossmeasurements and electrochemical techniques (potentiodynamic polarization curves, and electro-chemical impedance spectroscopy) were coupled with Scanning Electron Microscopy (SEM) and X-RayPhotoelectron Spectroscopy (XPS) analyses to characterize the inhibitive properties of AMEO and todetermine the chemical composition of the inhibitive film formed on the steel surface. AMEO acted as anefficient inhibitor against the carbon steel corrosion in 1 M HCl, and its inhibition efficiency increasedwith the inhibitor concentration reaching a value of up to 92% at 3 g/L. Polarization studies showed thatthe AMEO was a mixed-type inhibitor. Adsorption of AMEO on the steel surface in 1 M HCl solutionfollowed Langmuir’s isotherm and the thermodynamic parameters were determined and discussed. TheXPS studies showed that the inhibitive layer is composed of an iron oxide/hydroxide mixture whereAMEO molecules are incorporated.

The present work is devoted to the study of Artemisia Mesatlantica essential oil (AMEO) as greencorrosion inhibitor to afford the protection of carbon steel in 1 M HCl medium at 30 8C. Weight lossmeasurements and electrochemical techniques (potentiodynamic polarization curves, and electro-chemical impedance spectroscopy) were coupled with Scanning Electron Microscopy (SEM) and X-RayPhotoelectron Spectroscopy (XPS) analyses to characterize the inhibitive properties of AMEO and todetermine the chemical composition of the inhibitive film formed on the steel surface. AMEO acted as anefficient inhibitor against the carbon steel corrosion in 1 M HCl, and its inhibition efficiency increasedwith the inhibitor concentration reaching a value of up to 92% at 3 g/L. Polarization studies showed thatthe AMEO was a mixed-type inhibitor. Adsorption of AMEO on the steel surface in 1 M HCl solutionfollowed Langmuir’s isotherm and the thermodynamic parameters were determined and discussed. TheXPS studies showed that the inhibitive layer is composed of an iron oxide/hydroxide mixture whereAMEO molecules are incorporated.