Journal of Saudi Chemical Society · 2011 · 54 citations · 26 references
Natural SciencesMaterials EngineeringMaterials ScienceCorrosion ScienceElectrochemistrySurface ScienceCorrosion EngineeringCorrosion InhibitorsCorrosion Of SteelsCorrosion ProtectionCorrosion-resistant MaterialsElectrochemical CorrosionCorrosion ElectrochemistryCorrosion Inhibition MechanismsCorrosion Inhibitor EffectsElectrochemical PolarizationHydrogen ReductionIsotherm ModelingLangmuir Adsorption ModelPolarization
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∗, ΔHa∗, ΔG∗ and ΔSa∗) were estimated and discussed. The fundamental thermodynamic functions were used to glean important information about Argan oil’s inhibitory behavior.
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