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Mouni F.,Laboratoire Materiaux et Environnement | El Issami S.,Laboratoire Materiaux et Environnement | Bazzi L.,Etablissement Autonome de Controle et de Coordination des Exportations Agadir | Salghi R.,University Ibn Zohr | And 4 more authors.
Journal of Materials and Environmental Science | Year: 2015

The anti corrosion behaviour of Argan Oil (AO) and Cosmetic Argan Oil (CAO); extracted from Argania spinosa (L); in 2M H3PO4 containing 3.10-1 M NaCl solution on copper has been examined and characterized by weight loss, Tafel polarization, electrochemical impedance spectroscopy (EIS) . The experimental results reveal that the oils were shown to have good inhibition efficiencies in phosphoric acid. EIS analysis revealed that increase in concentration increases the charge transfer resistance, thus increased inhibition efficiency. Potentiodynamic polarization studies showed the oils acted as a mixed-type of inhibitors. The adsorption mechanisms for both extracts were mainly physisorption. The results obtained from the various methods are in good agreement.


Barouni K.,Laboratoire Materiaux et Environnement | Kassale A.,Laboratoire Materiaux et Environnement | Albourine A.,Laboratoire Materiaux et Environnement | Jbara O.,CNRS Laboratory of Engineering and Materials Science | And 3 more authors.
Journal of Materials and Environmental Science | Year: 2014

The corrosion inhibition of copper in 1 M HNO3 was studied by gravimetric and potentiodynamic polarization by use of amino acids such as : Acid aspartic (Asp), Acid Glutamic (Glu), Alanine (Ala), Asparagine (Asn), Glutamine (Gln), Leucine (Leu), Methionine (Met), and Threonine (The). The results obtained the from two different techniques are comparable, and show that Met is the best inhibitor for the corrosion of copper in 1M HNO3. Correlation between inhibition efficiency and quantum chemical calculations using semi empirical (AM1 and MNDO) and ab-initio methods is discussed.


Dhaouadi H.,Laboratoire des Utiles | Dhaouadi H.,Institute National Of Recherche Et Danalyse Physicochimique | Fadhalaoui A.,Laboratoire Materiaux et Environnement | Mdani A.,University of Umm Al - Qura | Rzaigui M.,Laboratoire Materiaux et Environnement
Ionics | Year: 2014

Cerium phosphate nanomaterials with different morphologies and sizes were synthesized via a hydrothermal process at 150 °C using cetyl-trimethyl-ammonium-bromide and ethylene-diamine-tetra acid as surfactants. The obtained samples were characterized by X-ray diffraction and a scanning electron microscope. A possible growth mechanism was proposed to reveal the formation process. The structural properties and the electrical conductivities of CePO4 nanomaterials were studied. The activation energies were obtained from Arrhenius plots where E a = 1.06 eV. The ac conductivity at different temperatures for CePO4 nanomaterials showed frequency independence in the lower frequency range. The dielectric measurements were carried out as a function of frequency and temperature. Variation of the dielectric properties and the ac conductivity with frequency revealed that the dispersion is due to a Maxwell-Wagner type of interfacial polarization in general. © 2013 Springer-Verlag Berlin Heidelberg.


Mounir F.,Laboratoire Materiaux et Environnement | El Issami S.,Laboratoire Materiaux et Environnement | Bazzi L.,Etablissement Autonome de Controle et de Coordination des Exportations Agadir | Chihab Eddine A.,Laboratoire Chimie Organique | And 4 more authors.
Journal of Materials and Environmental Science | Year: 2014

Cosmetic Argan Oil (CAO) was tested as inhibitor for copper corrosion in 2 M H3PO4 containing 0.3M of NaCl. The techniques used in this work were weight loss measurements and potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS). The inhibition efficiency was found to increase with inhibitor content to attain 97% for CAO at 7g/L. Inhibition efficiency E (%) obtained fromgravemitric and electrochemical methods are in reasonably good agreement. Results confirm the performance of copper in phosphoric medium containing CAO.

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