مقالههای Ahmed Dermaj
توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقالههای نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده میشوند.
۱Corrosion Inhibition and Dezincification of Brass in % 3 NaCl Solution by 3–Phenyl–1.2.4– Triazol–5–Thione
نویسنده(ها): Driss Chebabe*، Ahmed Dermaj، Zine El Abidine Ait Chikh، Hamid Ramli، Mostafa Doubi، Najat Hajjaji and Abdellah Srhiri
اطلاعات انتشار: Analytical & Bioanalytical Electrochemistry، سوم،شماره۳، Jun ۲۰۱۱، سال ۰
تعداد صفحات: ۱۲
The dezincification of brass is a problem that has often been encountered in the process of corrosion of brass in aqueous solution. Thus the inhibiting substances must used to reduce the dissolution of these metallic materials. The present work aimed to study the effect of 3–phenyl–1,2,4–triazole–5–thione (PTS) on Cu\Zn brass corrosion in 3% NaCl solution. This latter is prepared with a new method in our laboratory. The efficiency of (PTS) as brass (alloy 60 Cu–Zn) corrosion inhibitor in %3 NaCl solution was investigated using electrochemical impedance spectroscopy and potentiodynamic measurements.The results showed that the PTS is an excellent inhibitor. The inhibiting efficiency increased by an increase of its concentration. At 10–3 M the important polarization resistance value of the anodic branch at high current density is believed to be due to the resistance of the inhibitor film formed .The spectroscopic techniques showed that the PTS can be also used as an inhibitor of the dezincification of the brass in the same solution. Consequently, we have concluded that the PTS has good inhibiting effect to stop brass dezincification phenomenon.
۲Opuntia Ficus Indica Seed Oil:Characterization and Application in Corrosion Inhibition of Carbon Steel in Acid Medium
نویسنده(ها): Hind Hammouch*، Ahmed Dermaj، Driss Chebabe، Pascal Decaro، Najat Hajjaji1، Naima Bettach، Hisasi Takenouti، Abdellah Srhiri
اطلاعات انتشار: Analytical & Bioanalytical Electrochemistry، پنجم،شماره۲، Apr ۲۰۱۳، سال ۰
تعداد صفحات: ۱۹
The aim of this work is to characterise seed oil of opuntia ficus indica and to develop a new formulation to inhibit carbon steel corrosion in acidic medium. “OTH”, is a new environmentally friendly corrosion inhibitor containing Opuntia ficus indica seed oil. Fatty acid composition was analysed by Gas–chromatography after transesterification to Fatty Methyl esters (FAMES). The Electrochemical Impedance Spectroscopy (EIS) and voltamperometry measurements were carried out for different concentrations and immersion times. Surface analyses were carried out by Scanning Electron Microscopy (SEM) and Energy Dispersive X–ray Spectroscopy (EDS). The results obtained show that the main fatty acids of prickly pear seed oil were C16:0, C18:0, C18:1, C18:2. The content of unsaturated fatty acids was high (83%). Electrochemical measurements show that OTH acts as a good mixed corrosion inhibitor. This inhibitor formulation forms a thick film that plays a barrier layer on the iron surface to minimize the contact area with corrosive solution and hinder metal oxidation.
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