Study of corrosion inhibition for mild steel in hydrochloric acid solution by Limbarda crithmoides (L.) essential oil of Corsica

The inhibitive effect of limbarda crithmoides (l.) essential oil on the corrosion of mild steel in 1m hcl solution has been investigated by weight loss measurement. the results obtained showed that inhibition efficiency increases with inhibitor concentration to attain 77.85% at 2 g/l of essential oil. the temperature effect on the corrosion behavior of steel in 1m hcl without and with the inhibitor at 2 g/l was studied in the temperature range from 303 and 343 k. the inhibition was assumed to occur via adsorption of the inhibitor molecules on the metal surface. the adsorption of the essential oil components on the mild steel surface obeyed the langmuir adsorption isotherm. gibbs free energy of adsorption indicated that the adsorption process is spontaneous and the molecules adsorbed on the metal surface by the process of physical adsorption.