Author/Authors :
عباسف، واگيف م نويسنده Mamedaliev Institute of Petrochemical Processes, National Academy of Sciences of Azerbaijan, AZ1025 Baku, Azerbaijan Abbasov, Vagif M , عبداللاتيف، هاني م نويسنده Mamedaliev Institute of Petrochemical Processes, National Academy of Sciences of Azerbaijan, AZ1025 Baku, Azerbaijan Abd El-Lateef, Hany M , مامدكسنوا، سوينك آ نويسنده Mamedaliev Institute of Petrochemical Processes, National Academy of Sciences of Azerbaijan, AZ1025 Baku, Azerbaijan Mamedxanova, Sevinc A , علوف، لييوفر اي نويسنده Mamedaliev Institute of Petrochemical Processes, National Academy of Sciences of Azerbaijan, AZ1025 Baku, Azerbaijan Aliyeva, Leylufer I , اسماعيلوف، طيوب آ نويسنده Mamedaliev Institute of Petrochemical Processes, National Academy of Sciences of Azerbaijan, AZ1025 Baku, Azerbaijan Ismayilov, Teyyub A , ايلهام، موسايف ج نويسنده Mamedaliev Institute of Petrochemical Processes, National Academy of Sciences of Azerbaijan, AZ1025 Baku, Azerbaijan Ilham, Musayev J , ايداميروف، اورخان آ نويسنده Mamedaliev Institute of Petrochemical Processes, National Academy of Sciences of Azerbaijan, AZ1025 Baku, Azerbaijan Aydamirov, Orkhan A , اميروف، فرزين آ نويسنده Mamedaliev Institute of Petrochemical Processes, National Academy of Sciences of Azerbaijan, AZ1025 Baku, Azerbaijan Amirov , Fariz A
Abstract :
Two surfactants [sodium and potassium salts of naphthenic acids] were synthesized by liquid-phase oxidation process of the naphtha fraction of the Baku crude oil and their chemical structure was confirmed by FT-IR spectroscopy. The surface tension at 298K was measured; the critical micelle concentration (CMC) and some surface active parameters were calculated. The inhibition efficiency (?%) of these surfactants has been studied by both Linear polarization resistance corrosion rate and Potentiodynamic polarization measurements at 50 °C. The data showed that, the presence of investigated inhibitors results a high decrease in the corrosion rate. The inhibition efficiency increases with an increase in the inhibitor dose, getting maximum inhibition efficiency 99.48% at 100 ppm of potassium salt. The Tafel polarization results indicate that the inhibitors act as mixed inhibitors. Tafel slopes are approximately constant and independent on the inhibitor concentration. The adsorption of the inhibitors on the carbon steel surface obeys Langmuir’s adsorption isotherm. The thermodynamic parameters of adsorption revealed a strong interaction between the inhibitors and the corroding carbon steel surface.
