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Najih R.,Laboratory Valoris Et Securite Des Produits Agro Alimentaires | Chtaini A.,Equipe dElectrochimie Moleculaire et Materiaux Inorganiques | Oulfajrite H.,Equipe dElectrochimie Moleculaire et Materiaux Inorganiques
Portugaliae Electrochimica Acta | Year: 2011

The inhibition efficiency of natural phosphate and kaolin systems in controlling corrosion of stainless steel in HClO 4 (0.1 M) solution has been evaluated by electrochemical polarization methods, and electrochemical impedance spectroscopy. The electrochemical data show that the corrosion resistance is greatly enhanced after surface modification. The best protection is obtained with natural phosphate. The uniform coatings of phosphate and kaolin on iron substrates were obtained by electro deposition.


Dehbi S.,Equipe dElectrochimie Moleculaire et Materiaux Inorganiques | Massai H.,Equipe dElectrochimie Moleculaire et Materiaux Inorganiques | Massai H.,University of Yaounde I | Chtaini A.,Equipe dElectrochimie Moleculaire et Materiaux Inorganiques
Portugaliae Electrochimica Acta | Year: 2010

This work aims to investigate the electro oxidation of methanol, in alkaline solution at a copper electrode modified with electrodeposited natural phosphate and nickel (Ni-NP/Cu), by cyclic voltammetry, impedance measurements and square wave voltammetry. Morphological characterizations were performed by SEM and XRD techniques. It was found that Ni dispersed on natural phosphate (NP) shows a catalytic activity towards methanol oxidation better than massive Ni. Ni and NP were fixed on copper electrode by electro deposition using potentiostatic and galvanostatic techniques.

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