Author/Authors :
Afia, L. Universite´ Ibn Zohr - Ecole Nationale des Sciences Applique´es, Morocco , Salghi, R. Universite´ Ibn Zohr - Ecole Nationale des Sciences Applique´es, Morocco , Bammou, L. Universite´ Ibn Zohr - Ecole Nationale des Sciences Applique´es, Morocco , Bazzi, El. Etablissement Autonome de Controˆle et de Coordination des Exportations, Morocco , Hammouti, B. Universite´ Mohammed Premier - Faculte´ des Sciences d’Oujda - Laboratoire de Chimie Appliquée et Environnement (LCAE-URAC18), Morocco , Bazzi, L. Universite´ Ibn Zohr - Faculte´ des Sciences - Laboratoire Mate´riaux and Environnement, Morocco , Bouyanzer, A. Universite´ Mohammed Premier - Faculte´ des Sciences d’Oujda - Laboratoire de Chimie Appliquée et Environnement (LCAE-URAC18), Morocco
Abstract :
Corrosion inhibition effect of Argan oil (AO) on corrosion of C38 steel in 1 M HCl solution was investigated using weight loss measurements, electrochemical polarization and EIS methods. Results obtained reveal that Argan oil acts as a mixed inhibitor without modifying the hydrogen reduction mechanism. The inhibition efficiency increases with increased Argan oil concentration to attain a maximum value of 81% at 3 g/L. The inhibition efficiency of Argan oil decreases with the rise of temperature. Argan oil is adsorbed on the steel surface according to Langmuir isotherm model. The parameters (Ea^٭ , ∆Ha^٭ , ∆G^٭ and ∆Sa^٭ ) were estimated and discussed. The fundamental thermodynamic functions were used to glean important information about Argan oil’s inhibitory behavior.
Keywords :
Corrosion , Inhibition , Argan oil , Steel , Adsorption
