Use of Artemisia Mesatlantica Essential Oil as Green Corrosion Inhibitor for Mild Steel in 1 M Hydrochloric Acid Solution

The essential oil from aerial parts (stalks, leaves and flowers) of Artemisia Mesatlantica, was obtained by hydrodistillation and analyzed by GC and GC/MS. The main components of Artemisia Mesatlantica were 0-thujone (33.9%) followed by camphor (7.5%), 1,8-cineole (6.9%) and α-thujone (5.5%). Artemisia Mesatlantica essential oil (AMEO) was tested as corrosion inhibitor of mild steel in 1 M HCl using weight loss measurements. The obtained results showed that inhibition efficiency increases with increasing inhibitor concentration to attain 91 % at 2.76 g/L of AMEO at 303 K. Physical adsorption is proposed for the corrosion inhibition mechanism and the process followed the kinetic/thermodynamic model of El-Awady et al. in the temperature range from 303 to 343 K. The adsorption and kinetic parameters for mild steel/AMEO/1 M HCl system were calculated from experimental gravimetric data and the interpretation of the results are given.