Browsing by Author "Lekmine Farid"
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Item 1ères journées nationals d’étude sur la chimie théorique et ses applications JCTA1-21(Université de Khenchela, 2021-12-13) Lekmine FaridItem Caractérisation structurelle et électrochimique du revêtement Ni-P électrodéposés(2019) Lekmine FaridItem Characterization of Nano- Crystalline NiP Alloy Coatings Electrodeposited at Various Current Densities(Iranian Journal of Materials Science and Engineering, 2021-07) Lekmine Farid; BENTEMAM Hachemi; Guettaf Temam ElhachmiNickel phosphorus alloy coatings were prepared by electrodeposition route from sulfate electrolyte bath at various current densities. SEM studies revealed that spherical grains covered the entire surface with uniform distribution. EDX results showed a linear increase of P content in the developed deposits with current density, causing an increase in the grains size and a drop in hardness values. XRD studies revealed monocrystalline orthorhombic alloys at low phosphorus content (10.88 wt. %). Corrosion test results showed that 1 A.dm-2 is the best applied current density providing the nobler Ecorr (-171.4 mV) and the lower icorr (4.64 μA/cm2).Item Cours Corrosion des Métaux Master 2(2022) Lekmine FaridItem Study the effect of Ni-P coating and 4,5-dimethyl- 1,2-dithiol-3-thione inhibitor on the corrosion of carbon steel(2020) Lekmine FaridThe carbon steel is widely used in the petroleum industry because of its excellent mechanical properties, but it is exposed to different environments, Such as hydrochloric acid who are commonly used for pickling and also for the removal of rust and scales in petroleum industries. In this work, we have studied the protection against corrosion of carbon steel by applying the Ni-P alloy coating deposited on a steel substrate compared to another method of protection by adding the 4,5-dimethyl- 1,2-dithiol-3-thione inhibitor in an aggressive medium (1M HCL) using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods. The results obtained are shown that This organic compound inhibits the acidic corrosion even at low concentration, is good inhibitors and are in good agreement. The efficiency of the inhibition Is increase with the increase of inhibitor concentration to reach the optimal values of 8×10-5 mM and the best coating of nickel-phosphorus at current density 5 A dm-2. The obtained results showed that the Ni-P alloy coating Decreases the corrosion rate of carbon steel better than the inhibitor 4, 5-dimethyl- 1, 2-dithiol-3-thione.Item Synthesis and characterization of Ni–P–TiO2composites coatings fabricated by éléctrodeposition(1 st International Conference on Sustainable Energy and Advanced Materials IC-SEAM, Ouargla, ALGERIA, Faculty of Mathematics and Matter Sciences, Université de Kasdi Merbah Ouargla, (21-22 April 2021), 2021-04-21) Lekmine FaridItem The effect of current density on the corrosion behaviour of Ni-P- TiO2 in acidic solution(SÉMINAIRE INTERNATIONAL SUR LES SCIENCES DE LA MATIERE (PHYSIQUE ET CHIMIE), Algerian Journal of Engineering, Architecture and Urbanism, Siège social : A.N.E.A.U. Association, Université USTO, Bir El Djir, Oran, 31000, (17 - 18 Septembre 2021), 2021-09-17) Lekmine Farid