Author/Authors :
Larit, El Faiza Chemical Engineering and Environment Research Laboratory - University 20 August 1955-Skikda, Skikda, Algeria , Litim, Mohamed Department of Chemistry - Faculty of Sciences - University 20 August 1955-Skikda, Skikda, Algeria , Akkari, Hocine Functional Materials Group - LGMM Laboratory - University 20 August 1955-Skikda, Skikda, Algeria
Abstract :
The inhibition effect of three acetanilide compounds namely acetanilide (Ac1), o-methyl acetanilide (Ac2) and p-nitroacetanilide (Ac3) on the corrosion of 304L in 1 M HCl solution was studied by potentiodynamic polarization and electrochemical impedance spectroscopy methods. The results show that compound Ac3 is the best inhibitor and the inhibition efficiency follows the order: Ac3>Ac2>Ac1. Potentiodynamic polarization curves indicated that the inhibitors acted as mixed-type inhibitors. The adsorption of inhibitors on the stainless steel surface obeys to the Langmuir adsorption isotherm and has physisorption mechanism. All techniques employed in this study show the same order of inhibition efficiency.
Keywords :
EIS , Potentiodynamic polarization , Acidic media , Acetanilide derivatives , 304L stainless steel
