Fekry, A. M., "Impedance and hydrogen evolution studies on magnesium alloy in oxalic acid solution containing different anions", International Journal of Hydrogen Energy, vol. 35, issue 23, pp. 12945–12951, 2010. Abstract1-s2.0-s0360319910017556-main_2.pdf

The corrosion behavior of AZ31E alloy was investigated in oxalic acid solution using different electrochemical techniques. The effect of concentration was studied, where the corrosion rate was found to increase with increasing oxalic acid concentration and hydrogen evolution. The effect of adding Cl−, F− or ions on the electrochemical behavior of AZ31E electrode was studied in 0.01 M oxalic acid solution at 298 K. It was found that the corrosion rate increases with increasing Cl− or F− ion concentration, however, it decreases with increasing ion concentration. Good agreement was observed between the results obtained from electrochemical techniques and confirmed by Scanning electron micrographs.

Ameer, M. A., and A. M. Fekry, "Inhibition effect of newly synthesized heterocyclic organic molecules on corrosion of steel in alkaline medium containing chloride", International Journal of Hydrogen Energy, vol. 35, issue 20, pp. 11387–11396, 2010. Abstractinhibition_effect_of_newly_synthesized.pdf

Two new organic compounds were tested experimentally as inhibitors for mild steel in NaOH in presence of NaCl by electrochemical and hydrogen evolution techniques. Results demonstrated that the two inhibitors show an adsorption on steel surface according to Langmuir adsorption isotherm. The inhibition efficiency increases with increasing inhibitor concentrations to attain a maximum value at 1.0 mM for compound I and at 6.0 mM for compound II, respectively. The results were confirmed by surface examination via scanning electron microscope.

Hameed, A. R. M., and A. M. Fekry, "Electrochemical impedance studies of modified Ni–P and Ni–Cu–P deposits in alkaline medium", Electrochimica Acta, vol. 55, issue 20, pp. 5922–5929, 2010. AbstractPDF

Ni–P and Ni–Cu–P deposits were supported over the commercial carbon using the electroless plating technique. The formed samples were characterized by applying SEM, XRD and EDX analyses. An amorphous Ni–P surface was obtained with 73.70 wt% Ni and 11.45 wt% P. The addition of copper to the plating bath reduces the deposited amount of nickel and phosphorus. The electrochemical performance of these deposits has been investigated in 0.1 M KOH solution using electrochemical impedance spectroscopy (EIS) measurements. The effect of pH, deposition time and temperature of the plating bath on the impedance characteristics of the two deposits was studied. It was found that the resistance (RT) and relative thickness (1/CT) of the two coatings in 0.1 M KOH solution increase with increasing either pH or deposition time or temperature of the plating bath. Our results indicate that Ni–Cu–P deposit has more corrosion resistance and lower corrosion current density (icorr) value than Ni–P deposit under different conditions. EIS results were well confirmed by potentiodynamic polarization and cyclic voltammetry techniques.

Fekry, A. M., "Electrochemical corrosion behavior of mild steel in acidic medium containing different organic inhibitors", Global Journal of Physical Chemistry, vol. 1, issue 2, pp. 131-153, 2010. electrochemical_corrosion.pdf
Fekry, A. M., "Electrochemical corrosion behavior of magnesium alloys in biological solutions", Magnesium Alloys, Theory and Applications: INTECH, 2010. intech-electrochemical
Ghoneim, A. A., A. M. Fekry, and M. A. Ameer, "Electrochemical behavior of magnesium alloys as biodegradable materials in Hank's solution", Electrochimica Acta, vol. 55, issue 20, pp. 6028–6035, 2010. Abstract1-s2.0-s001346861000753x-main.pdf

The electrochemical behavior of extruded AZ31E and AZ91E alloys was investigated in Hank's solution at 37 °C. The behavior of the two alloys was studied with immersion time using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and weight loss tests. It was found that the corrosion resistance of AZ31E alloy is higher than that of AZ91E. Also, the effect of adding different concentrations of a commercial drug called glucosamine sulphate (as inhibitor) to Hank's solution was studied for AZ31E alloy. The corrosion was effectively inhibited by the addition of 0.01 mM glucosamine sulphate that reacts with AZ31E alloy and forms a protective film on its surface. The results were confirmed by surface examination via scanning electron microscope.

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