Corrosion And The Corrosion Of Mild Steel

2186 WordsJun 11, 20169 Pages
N-aminophthalimide as synthon for heterocyclic Schiff bases: Efficient utilization as corrosion inhibitors of mild steel in 0.5 mol.L-1 H2SO4 solution Mohamed M. Abdelaal [a]*, Y.F. Barakat [a], Hamed A. Y. Derbala [b], Hamdy H. Hassan [b] [a] Tabbin Institute for Metallurgical Studies, P.O. Box 109 Helwan, Cairo, Egypt. [b] Chemistry Department, Faculty of Science, Ain Shams University, Abbasiya, Cairo, Egypt, 11566. *Corresponding author: E-mail address: chemtims@yahoo.com Abstract Many Schiff bases, including two novel compounds, were prepared to inhibit the corrosion reactions of mild steel in acidic medium. Their chemical structures were determined using IR, Mass spectrometry and 1HNMR spectroscopic analysis. The results showed that the protection of mild steel, by these Schiff bases, depends on many factors like function group, inhibitor dose and the temperature of the medium. Thermodynamic adsorption parameters (Kads, ΔGads) of studied inhibitors were calculated using the Langmuir adsorption isotherm. The presence of iodide ions in the medium increased the efficiency of these inhibitors. AC impedance spectroscopy was used to determine the polarization resistance. The scanning electron microscopy (SEM) showed the corrosion products decreased after using these inhibitors. In addition, the best inhibitor in this study used to increase corrosion inhibition of treated sample by Electrolytic plasma process (EPP). Key words: N-aminophthalimide; Schiff bases; Mass
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