Publications Scientifiques

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    Application of Sodium Methyl Ester Sulfonate Anionic Surfactants as Corrosion Inhibitors for Carbon Steel in Oilfield Injection Water
    (Springer Nature, 2024) Asselah, Amel; M’Yassa, Affif Chaouche; Tazerouti, Amel
    Abstract: In this study, the anticorrosive properties of a series of sodium methyl ester sulfonate anionic surfactants on a carbon steel were estimated for an oilfield injection water collected from a well of Hassi R’Mel region—Algeria, known as Baremian water, and are compared to those of sodium dodecyl sulfate. This class of surfactants was synthesized from fatty acids by a photochemical process and present good physico-chemical properties and good biodegradability. The inhibition performance was evaluated by weight loss and electrochemical techniques: linear polarization resistance and electrochemical impedance spectroscopy. The results showed that these surfactants are good inhibitors; the inhibition efficiency increases with increasing concentration surfactants. In addition, the increase of chain length surfactants leads to the best inhibition efficiency for sodium sulfo palmityl methyl ester surfactant with 95.27, 98.20, and 95% via weight loss, linear polarization resistance and electrochemical impedance spectroscopy, respectively. Scanning electron microscopy–Energy dispersive X-ray allowed the visualization of a good adhesion of the protective deposit formed by the surfactants on the carbon steel surface including the elements presents on this surface as sodium and sulfur. The adsorption of these surfactants shows the maximum adherence to the Langmuir model and the values of Gibbs free energy of adsorption indicated that the inhibitor molecules are physically adsorb onto the metal surface
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    Corrosion protection enhancement On aluminum alloy and magnesium alloy by Mo-Ceo2 conversion coating
    (University Mohammed Premier Oujda, 2021) Ziouche, A.; Hammouda, A.; Boucherou, N.; Mokhtari, M.; Hafez, B.; Elmsellem, H.; Abaidia, S.
    In this paper, Mo-CeO2 conversion coating developed to protect Aluminum 2024 alloy and Magnesium AZ31 alloy against corrosion. The cerium oxide incorporated in Molybdenum conversion coating, which considered as a promising alternative to replace chromate compounds. The corrosion efficacy was improving and characterized by polarization curves and EIS measurements. The structural and the microstructural Mo-Ce O2 conversion coating was characterized by AFM, SEM and XRD and the mechanical proprieties was determined by Nano indentation. The presence of molybdenum and oxide of cerium confirmed with good physical and mechanical proprieties. The presence of Ce O2 in the conversion coating had a beneficial effect on the corrosion resistance of the both materials
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    Experimental and theoretical evaluation of the adsorption process of some polyphenols and their corrosion inhibitory properties on mild steel in acidic media
    (Elsevier, 2021) Zerroug, Meriem; Ferkous, Hana; Djellali, Souad; Bouzid, Abderrazak; Mohammed A., Amin; Rezki, Leila; Belakhdar, Amina; Jeon, Byong-Hun; Boulechfar, Chérifa; Benguerba, Yacine
    Polyphenols are now widely acknowledged as safe and biodegradable corrosion inhibitors due to their cost-effectiveness. As a result, this research examines how well polyphenols extracted from Artemisia Herba alba (AHA) prevent mild steel corrosion in a 1 M HCl solution. Inhibitory performance is determined using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, and weight loss tests. The shape and chemical content of the mild steel sample surface are evaluated by atomic force microscopy (AFM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) after contact with AHA secondary metabolites in the acidic solution. According to the results of polarization curves, AHA extract works as a mixed-type inhibitor. For all AHA concentrations tested, the Nyquist plots show a semi-circular capacitive loop. On metal surfaces, the Langmuir isotherm regulates inhibitor adsorption. The effectiveness of inhibition is proportional to the extract concentration, reaching 92.9% at 900 ppm. On metal surfaces, the Langmuir isotherm governs inhibitor adsorption. The effectiveness of inhibition is proportional to the extract concentration, reaching 92.9% at 900 ppm. These findings are supported by metal surface experiments, which show that the deposited inhibitor molecules successfully prevent HCl attacks at steel grain boundaries. Finally, quantum chemistry simulations show that dicaffeoylquinic acids, which were found to be the most prevalent AHA extract components, are effective corrosion inhibitors
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    Perpendicular weak permanent magnetic field effect on the electrodeposited nanostructured ZnO film and its kinetic corrosion behavior
    (Springer, 2019) Taleb, Samia; Dokhan, Nahed; Zazi, Nacer; Chopart, Jean-Paul
    In this work the effect of the permanent weak magnetic field on the electrodeposited ZnO nanostructured film on the ITO substrate elaborated under –0.5 and –0.8 V was studied. The deposits have been characterized by SEM, EDX, and electrochemical tests. The obtained results showed the increase of crystallites dimension in the presence of magnetic field under –0.5 V, and the decrease of the number of large crystallites of ZnO deposits under potential deposition equal to –0.8 V. The deposition under weak magnetic field change the current deposition, the open circuit potential (OCP), the polarization curve parameters after one week of corrosion and crystallographic parameters
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