Prof. Dr. G. Y. El-Ewady | JEPT - Journal for Electrochemistry and Plating Technology

Fig. 12: SEM microstructures for CS in the nonexistence and existence of 300 ppm of Gliclazide after submersion for 1 day
Fig. 11: EFM for meal in 1M HCl unlucky deficiency and vicinity of distinctive convergences of Gliclazide
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
Tab. 10: EFM kinetic variables calculation from CS that submersion in 1 M HCl without and with various doses of Gliclazide at 25 oC
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

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.