Anti-corrosive properties of Argan oil on C38 steel in molar HCl solution

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 fundamentalthermodynamic functions were used to glean important information about argan oil’s inhibitory behavior.