About Prof. Dr. A. S. Fouda

Chem. Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
Email: asfouda@hotmail.com

He received his B.Sc. Chemistry, Cairo University, Egypt, 1972, M.Sc. in Physical and Inorganic Chemistry, from El-Mansoura University, Egypt, 1975 and Ph.D. in Physical Chemistry, El-Mansoura University, Egypt, 1979, 1988, Prof. of Physical Chemistry, D.Sc in Chemistry 2013. Qatar University, Qatar, 1988-1992. He is a member of Egyptian corrosion Bulletin, Member of the editorial many Journals. He granted the Chemical Engineering Department and Material Science, Minnesota University, USA 1982-1983 and Institute, Bonn Univ. Germany 1989. He had prizes from National Award for Chemistry from Academy of Scientific Research and Technology in Cairo, 1982, first class State Medal of Sciences and Arts, 1984 and Prize of El-Nasr Company for Fertilizers, Talkha, 1981. He is a international reviewer for a huge number of thesis, journals and projects. He had published more than 200 papers in international journals. His main research interests are in the field of Physical Chemistry, Especially electrochemistry (Corrosion and corrosion inhibition in all media for metals and alloys, Fuel cells, Electrode position of metals and oxides).

Please find bellow all articles from this author which were published in our journal. Lists with articles the author published in our or other journals, can be found at the following databases:

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Corrosion Inhibition of Carbon Steel in hydrochloric acid medium using Gliclazide drug

Posted on Thursday, November 30, 2017 by Prof. Dr. A. S. Fouda

Fig. 10: The Nyquist (a) and Bode (b) curves for oxidation of CS in 1 M HCl in the nonexistence and existence of various doses of Gliclazide at 25 °C
Fig. 11: EFM for meal in 1M HCl unlucky deficiency and vicinity of distinctive convergences of Gliclazide
Tab. 4: Thermodynamic variables for the dissolution of CS in 1 M HCl in the nonexistence and existence of varied doses measurements of investigated drug
Fig. 12: SEM microstructures for CS in the nonexistence and existence of 300 ppm of Gliclazide after submersion for 1 day
Tab. 10: EFM kinetic variables calculation from CS that submersion in 1 M HCl without and with various doses of Gliclazide at 25 oC

The role of Gliclazide as corrosion drugs for CS in 1 M HCl have been studied by using weight loss (WL), Hydrogen evaluation (HE), potentiodynamic polarization (PP), electrochemical impedance spectroscopy (EIS) and Electrochemical frequency modulation (EFM) techniques. Weight loss (WL) studied at various temperatures between (25 – 45^oC) but Hydrogen evaluation (HE), Open circuit potential (E_OCP) and all electrochemical studied at 25^oC and seen that the gliclazide studied are mixed type drug. The effect of temperature on corrosion inhibition, the activation and the thermodynamic of adsorption parameters were determinate. Electrochemical impedance was utilizing to examine the inhibition of corrosion and the mechanism. The existence of the Gliclazide in the solution rise the charge transfer resistance and reducing the capacitance of the double layer. The adsorption of the Gliclazide on the surface of CS was found to obey with Langmuir adsorption isotherm and discussed the thermodynamic parameters (ΔG^o, ΔH^o and ΔS^o) that were determinate. The morphology of inhibition of Gliclazide on CS surface was analyzed by scanning electron microscope (SEM) technology, energy dispersive X-ray spectroscopy (EDX) and atomic force microscopy (AFM), all examine techniques illustrate the formation of thin film from Gliclazide inhibitor adsorbed on the metal surface.It was found the adsorption process is spontaneous and increases, with increasing of inhibition efficiency.

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Delonix Regia Leaf Extract as Environmental Friendly and Safe Corrosion Inhibitor for Carbon Steel in Aqueous Solutions

Posted on Monday, April 10, 2017 by Prof. Dr. A. S. Fouda

Tab. 5: Values of adsorption isotherm parameters for CS in 1 M HCl contain different doses of Delonix regia leaf extract
Fig. 8: Transition state plots Log C.R./T vs. 1/T curves for CS in 1 M HCl in the absence and presence of different doses of Delonix regia leaf extract
Fig.4: Bode plots for CS in 1M HCl solutions in the absence and presence of various Delonix regia leaf doses at 25oC
Fig. 2: Nyquist plots for CS in 1M HCl at different doses of Delonix regia leaf at 25°C

Delonix regia leaf extract activity as a green corrosion inhibitor (environmental friendly) for carbon steel (CS) in 1M HCl has been studied using weight loss (WL), potentiodynamic polarization (PP), electrochemical frequency modulation (EFM) and electrochemical impedance spectroscopy (EIS). The weight loss results show that Delonix regia leaf extract is an excellent corrosion inhibitor. The inhibition efficiency (IE) increases with temperature from 25 to 45oC, reaching a maximum value of 78.8 % at the highest concentration of 300 ppm at the temperature of 45oC. Polarization measurements demonstrate that the Delonix regia leaf extract acts as a mixed type inhibitor. Nyquist plot illustrates that on increasing Delonix regia leaf extract dose, the charge transfer increases and the double layer capacitance decreases. The adsorption of Delonix regia leaf extract on CS obeys Temkin adsorption isotherm. Continue reading →

Adsorption and inhibitive properties of aqueous extracts of rosmarinus as a green corrosion extract for copper in HNO₃

Posted on Wednesday, November 30, 2016 by Prof. Dr. A. S. Fouda

Fig. 9a-c: SEM micrographs of copper surface (a) before of immersion in 1 M HNO3, (b) after 48 h of immersion in 1 M HNO3, (c) after 48 h of immersion in 1 M HNO3+ 11x10-6 M of Rosmarinus extract at 25°C
Fig. 8: Equivalent circuit model used to fit experimental EIS
Fig. 7b: The Bode plots for the corrosion of copper in 1M HNO3 in the absence and presence of different concentrations of Rosmarinus extract at 25OC
Fig. 1: Weight loss-time curves for the corrosion of copper in 1 M HNO3 in the absence and presence of different concentrations of rosmarinus extract at 25ᵒC

The efficiency of plant extract as corrosion extract for copper in 1M HNO₃ medium was carried out using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) techniques. The results showed variation in inhibition performance of the extract with varying concentration, immersion time and temperature. Langmuir isotherm was tested to describe the adsorption behavior of the extract on the copper surface. Potentiodynamic polarization study clearly revealed that this extract acts as a mixed type inhibitor i.e. the addition of the extract enhances both cathodic and anodic reactions. The results of the electrochemical impedance study showed a decrease in double layer capacitance and an increase in the charge transfer resistance. The results showed that rosmarinus extract could play significant role as corrosion inhibitor for copper in 1M HMO₃. Continue reading →

8-hydroxy-7-phenylazo-quinoline-5-sulfonicacid derivatives as corrosion inhibitors for copper in nitric acid solutions

Posted on Tuesday, May 24, 2016 by Prof. Dr. A. S. Fouda

Prof. Dr. A. S. Fouda
Fig. 9: Molecular orbital plots of investigated compounds
Fig. 1: Weight loss-time curves for the dissolution of copper in the absence and presence of different concentrations of compound (1) at 300 0C
Fig. 8: EFM spectra for copper in of 1 M HNO3 in the absence and presence of 21x10-6 M compound (1)
Tab. 9: Calculated quantum chemical parameters for investigated compounds
Fig. 3: Log k (corrosion rate) - l/T curves for copper dissolution in 1M HNO3 in absence and presence of different concentrations of compound (1)

Corrosion Inhibition of copper in nitric acid by 8-hydroxy-7-phenylazo-quinoline-5-sulfonicacid derivatives have been studied using weight loss and electrochemical measurements. The results showed that these derivatives act as moderate corrosion inhibitor for copper at all concentrations of these derivatives. All results indicate that the inhibition efficiency increases with increasing inhibitor concentrations. Polarization curves revealed that these derivatives are mixed type inhibitors. The adsorption of these derivatives on the surface of the copper specimens obeys Temkin adsorption isotherm. Some thermodynamic and kinetic parameters for the corrosion process were calculated and discussed. Some quantum chemical parameters for these derivatives calculated by the density function theory (DFT) semi-empirical method to provide further insight into the mechanism of inhibition of the corrosion process. Continue reading →

Cephalexin as Efficient Corrosion Inhibitor for Mild Steel in Acidic Media Chemical, Electrochemical and Thermodynamic Studies

Posted on Thursday, March 31, 2016 by Prof. Dr. A. S. Fouda

Fig. 13: The optimized molecular structures, HOMO, LUMO
Prof. Dr. A. S. Fouda
Tab. 9: The calculated quantum chemical parameters for Cephalexin compound using PM3.
Tab. 8: Electrochemical kinetic parameters obtained by EFM technique for mild steel in 0.5 M H2SO4 solutions with different concentration of investigated drug
Fig. 12: Intermodulation spectrum for mild steel in 0.5 M H2SO4 solutions with 600 ppm of investigated compound at 25 ºC
Fig. 11: Intermodulation spectrum for mild steel in 0.5 M H2SO4 solutions without investigated compound at 25 ºC.
Fig. 1: Molecular structure of Cephalexin Molecular formula: C16H17N3O4S, Molecular weight: 347.39
Fig. 9: The bode plot for mild steel in 0.5 M H2SO4 solution in the absence and presence of different concentrations of the investigated drug

The corrosion inhibition of mild steel in 0.5 M H₂SO₄solution by pharmaceutical antibacterial drug named Cephalexin has been investigated by using weight loss, potentiodynamic polarization, electrochemical frequency modulation technique (EFM) and electrochemical impedance spectroscopy (EIS) measurements. The polarization data showed that this drug is mixed-type inhibitor. The percentage inhibition efficiency was found to increase with increasing the concentration of the drug and with decreasing temperature. The Langmuir`s isotherm was found to provide an accurate description of adsorption behavior of this drug. Some thermodynamic parameters were computed and discussed. The correlations between advanced quantum chemical concepts and inhibition efficiency was found and discussed. The data obtained from different methods are in good agreement. Continue reading →

JEPT – Journal for Electrochemistry and Plating Technology

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Author Archives: Prof. Dr. A. S. Fouda