Synergistic Inhibition Effect of 10-(3-Quinuclidinyl-Methyl) Phenothiazine and Potassium Iodide on Carbon Steel Corrosion in Sulfuric Solution

Ahmed A. Farag, Khalid Zakaria

Abstract: The inhibition effect of 10- (3-quinuclidinylmethyl) phenothiazine (QMPT) ; Potassium iodide and their synergistic effect on the corrosion of carbon steel in 0.5 M H2SO4 solution was studied by different electrochemical techniques. The inhibition efficiency increases with QMPT and KI concentration and increase further in presence of QMPT/KI mixtures. The adsorption of QMPT and KI on the metal surface in 0.5 M H2SO4 solution obeys the Langmuir adsorption isotherm. The probable inhibitory mechanism is proposed from the viewpoint of adsorption theory. The synergism parameter suggests that there is a cooperative mechanism between the iodide anion and QMPT cations.

Keywords: Corrosion inhibitor, Synergism, Iodide ion, Adsorption, EIS

How to Cite?: Ahmed A. Farag, Khalid Zakaria, "Synergistic Inhibition Effect of 10-(3-Quinuclidinyl-Methyl) Phenothiazine and Potassium Iodide on Carbon Steel Corrosion in Sulfuric Solution", Volume 3 Issue 5, May 2014, International Journal of Science and Research (IJSR), Pages: 107-113, https://www.ijsr.net/getabstract.php?paperid=20131690, DOI: https://dx.doi.org/10.21275/20131690