Browsing by Author "Khoukhi, Faiza"

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    The Application of Enzymological Techniques for Determination of the Inhibitor Activity of Bio Enzym Extracted from Seawater Bacteria P s eudomonas aerogenosa to Fight Biocorrosion of Carbon steel
    (Central de Documentare Al Industriei Chimice Ri, 2017) Khoukhi, Faiza; Kebouche, Salima; Djelali, Nacer-Eddine; Gana, Mohamed Lamine
    The paper presents a studies for the development of new corrosion inhibitors by biotechnological way applicable to many areas of petroleum industry including, characterization of protective films on carbon steel and biocorrosion inhibition. Our research is oriented towards the isolation of new strains of bacteria from the sea waters of the Mediterranean region that have power (inhibitory and/or bactericidal that blocks the growth of sulfate-reducing bacteria responsible for microbiologically influenced by production of Pyocyanin (1 hydroxyphenazin) or 5-methylphenazin-1-one. Our first objective was to isolate the population of Pseudomonas Aerugenosa on a specific medium, characterization gram, then fermentation in a nutrient broth. The second objective of this study is evaluation of corrosion rate by weight loss method with injecting different dose of the crude enzyme extract CEE containing the methylphenazine (Pyocyanin). An efficacy test was performed on test kit vials containing the specific culture medium with the SRB contaminated with industrial injection water from SONAHESS region. The total disappearance of the SRB is 40% of CEE by blocking their metabolism in the growth phase confirms the efficiency of treatment
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    A Comprehensive Study on Crude Methanolic Extract of Daphne gnidium L. as Effective Corrosion Inhibitors of Mild Steel Induced by SRB Consortium
    (Springer, 2019) Djouahra-Fahem, Djamila; Angar, Yassmina; Lamine Mohamed, Gana; Khoukhi, Faiza; Kebbouche-Gana, Salima
    The aim of the present work is the evaluation of effect of methanolic extract obtained from Daphne gnidium against biocorrosion caused by sulphate-reducing bacteria (SRB). Herein, the study of the influence of SRB consortium has been realized on the biological and electrochemical properties of the carbon steel API5LX60 immersed in water sample obtained from an Algerian oil field separator. The monitoring of the treatment effects on the SRB performance using kits test and weight loss methods showed a positive effect of the methanolic extract of D. gnidium as a corrosion inhibitor at a concentration of 0.8 g/L. In the other hand, the weight loss test has generated an efficiency rate of 95.99% at a concentration of 1.6 g/L. A linear polarization resistance approved these results, and they have given a yield of 91.14% with a polarization resistance value of 28.9 kΩ cm2 at a concentration of 0.25 g/L.
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    Contribution à l’étude des techniques de lutte biotechnologiques appliquées contre la biocorrosion des installations pétrolières
    (Université M'hamad Bougara : Faculté des Sciences, 2021) Khoukhi, Faiza; Gana Kebbouche, Salima(Directeur de thèse)
    La CIM en milieu anaérobie est un processus de corrosion très complexe. Même si le mécanisme global est connu et que des méthodes pour lutter contre le phénomène sont effectives, il n’empêche que la recherche des techniques de lutte biotechnologiques reste un moyen en cours de développement
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    Contribution to the Study of Biotechnological Control Techniques Applied Against Biocorrosion Oil Installations
    (Revista de Chimie SRL, 2021) Khoukhi, Faiza; Nacer-Eddine, Djelali; Kebouche, Salima; Gana, Mohamed Lamine
    The biological activity of oil extracted from green algae has long been known, but evaluation of bimolecular activities contained in this oil on an industrial scale, especially in the oil industry, was the objective of our research project. The first stapes of this study is to extract the essential oil from green algae marine Ulva Lactuca in our region, obtained by extraction/purification method based on hydro distillation and methanol extraction, the work performed at the laboratories of Sonatrach (SH/DTD/AUI/CEM). The second stapes is to evaluate the potential of these algae extracts on microbiologically influenced corrosion. After chemical-physic characterization of two bio naturals products A and B, we test their effectiveness as a bactericide on bacterial corrosion of carbon steel in water contained sulfate reducing bacteria by electrochemical analysis techniques (Open-circuit potential/OCP and Electrochemical Impedance Spectroscopy/EIS).
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    Efficiency Evaluation of Anti-corrosion Treatment of Carbon Steel by Extracts of Red Algae Collected from Mediterranean Coast
    (Revista de Chimie SRL, 2021) Khoukhi, Faiza; Kebbouche-Gana, Salima; Djelali, Nacer Eddine; Gana, Mohamed Lamine
    The paper presents the assessment of inhibition effectiveness of biomolecules extracted from red seaweed against biocorrosion in the petroleum industry. The first objective of this study was to obtain extracts (A, B and C, prepared respectively from red algae species: Corallina ellongata, Gymnogongrus crenulatus and Pterocladia capillacea) by ethanol extraction method. The infrared spectra of the three extracts confirmed the presence of amine derivatives molecules known by their anti-corrosion inhibiting powers. The second objective was based on the identification of physico-chemical characteristics of the extracts and thus revealing their inhibitory and / or bactericidal power in bacterial corrosion of carbon steel in injection water contaminated with sulfato-reducing bacteria. Biological test of all extracts gave a concentration upto 10 germs/mL in contaminated water by sulfato-reducing bacteria during 28 days of incubation at 37°C. Evolution in time of the open-circuit potential showed a longer incubation time for electrolyte with extracts, whereas the stabilization time was shorter. Current corrosion density, polarization resistance, charge transfer resistance and double layer capacity were determined by using linear polarizarion resistance technique and electrochemical impedance spectroscopy. The corrosion protection efficiency of extract obtained from Gymnogongrus crenulatus (extract B) reached a maximum protective capacity of 99.69% at 5 ppm in the injection water.
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    Etude de l'éfficacité de deux inhibiteurs de corrosion dans les milieux multiphasiques (eau, huile et gaz)
    (2008) Khoukhi, Faiza
    L'inhibition de la corrosion est la méthode la plus commune pour réduire la corrosion de l'acier au carbone dans les milieux multiphasiques (eau, huile et gaz) dans les industries pétrolières. Les inhibiteurs de corrosion se composent essentiellement de molécules actives qui forment une couche protectrice à la surface du métal. La présence de la phase huileuse dans le milieu multiphasique corrosif empêche l'arrivée de l'inhibiteur à la phase aqueuse responsable de la corrosion. Donc une partie de l'inhibiteur de corrosion ne participe pas à l'inhibition. Pour mieux expliquer l'efficacité d'un inhibiteur par rapport à un autre l'étude d'un critère physico-chimique qui est le partage entre les deux phases est importante dans ce travail par la détermination du coefficient de partage