N-Aminophthalimide as a Synthon for Heterocyclic Schiff bases: Efficient Utilization as Corrosion Inhibitors of Mild Steel in 0.5 mol.L-1 H2SO4 Solution

Abdelaal, Mohamed M.; Mohamed, Saad; Barakat, Yosry.F.; Derbala, Hamed A. Y.; Hassan, Hamdy H.; Al Zoubi, Wail

doi:10.21608/ejchem.2018.2414.1198

N-Aminophthalimide as a Synthon for Heterocyclic Schiff bases: Efficient Utilization as Corrosion Inhibitors of Mild Steel in 0.5 mol.L-1 H2SO4 Solution

Document Type : Original Article

Authors

¹ Tabbin Institute for Metallurgical Studies, P.O. Box 109 Helwan 11421, Cairo, Egypt.

² Chemistry Department, Faculty of Science, Ain Shams University, Abbasiya, Cairo, Egypt, 11566.

³ School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea

10.21608/ejchem.2018.2414.1198

Abstract

Many Schiff bases were prepared to inhibit the corrosion reactions of mild steel in acidic medium. Their chemical structures were determined by using different techniques. Thermodynamic adsorption parameters of inhibitors were determined 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. The results show that the planer inhibitor is more effective than rich-electron one because it covers the whole surface. In addition, the mechanism of these inhibitors depends on decreasing the anodic and cathodic current.

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