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Register a new userPreparation and Characterization of an Aluminum Oxide Coating for Oxidation Protection by the Sol – Gel technique
تحضیر و توصیف طلاء من أكسید الألمنیوم للحمایة من الأكسدة بتقنیّة المحلول – ھلام
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حضرت طبقات حماية سطحية رقيقة من أكسيد الألمنيوم Al2O3 المقاوم للأكسدة عند درجات الحرارة العالية، باستخدام تقنية المحلول – هلام ، و طريقة الطلي بالتدوير. لزيادة سماكة الطبقات ، أضيف معّلق الكورندم إلى "محاليل" الألومينا. اعتُمد في تحضير "محاليل" الألومينا ، على إجرائية معدلة من إجرائية Yoldasالمعيارية.
Surface protective thin layers of high temperature oxidation resistant aluminum oxide Al2O3, have been prepared by the sol-gel processing, using the spin coating method. In order to increase layer thickness, corundum suspension was added to the alumina sol.
References used
Martin Dressler, Sol-Gel Preparation and Characterization of Corundum Based Ceramic Oxidation Protection Coatings, 2006
John Stringer, High temperature corrosion in practical systems, JOURNAL DE PHYSIQUE IV Colloque C9, Volume 3, decembre 1993
P. Fauchais and A. Vardelle, Thermal Sprayed Coatings Used Against Corrosion and Corrosive Wear, SPCTS, UMR 7315, University of Limoges, France,(2012). [4] F.Balkhi, Thermal Barrier Coating Fabricated by EB-PVD methods, MS,HIAST,(2011)
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In this research project, the EPON 828 /Hardener 2512 epoxy resin coating
has been prepared at the ambient laboratory temperature with different epoxy/
hardener ratio.
epoxy – Conductive Carbon Black (Epoxy – CCB) nanocomposite was
prepared with different CCB/Epoxy ratios and ancamine 2280 as a curing
agent.
During this study, various types of silicon oxide were prepared
as aerogel and xerogel using multiple precursors and different
drying technics. Some of these samples were prepared from
Sodium silicate (waterglass) Na2SiO3 as a precursor which is a
cheap material, while others were prepared using tetraethoxysilane
(TEOS).
desulfurization study of gas oil is very important, in
order to reduce the resulted pollution from acidic gas SO2, which
results by burning the fuel, and to prevent poisoning of sensitive
catalysts with sulfur, in subsequent processes, and to prev
ent
corrosion of engines and equipment in refineries. So, refineries
have been restricted by very low sulfur content, in their products.
Because the hydrodesulphurization did not demonstrate good
efficiency in reducing the sulfur and aromatics content to the
required limits, it has been to search for alternative or completed
methods for it .One of these processes is the oxidation –extraction
method, which has been studied in our work. We used hydrogen
peroxide as oxidant, and acetonitrile as extraction solvent. We
studied Operation conditions in terms the proportion of oxidant and
extraction solvent to fuel, and we chose the operation temperatures
to suit the specifications of the oxidant and extraction solvent. We
studied diesel specifications, which we applied at it the process of
oxidation and extraction.
يعد الميتانول و الإيتانول من أكثر المحلات شيوعاً، و بما أن درجة غليانها أقل من مئة
درجة مئوية فإنها تتطاير بشكل سريع. و على سبيل المثال، يستعمل الميتانول في تصنيع
الأصبغة و العقاقير و العطور.. و هو شديد السمية، لذلك من الضروري تطوير محسات لكشفه.
أ
ما غاز الأمونيا فهو من ملوثات الهواء و له مصادر كثيرة مثل صناعة الأسمدة و أنظمة
التبريد.. و من هنا أهمية كشفه.
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