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Article
A Study of the Chemical Resistance and Hardness of Epoxy Reinforced by Magnesium Oxide and Charcoall Activated Particles

Author: Nabil KadhimTaieh
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 5 Part (A) Engineering Pages: 950-958
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In this research, some samples from Epoxy with Magnesium oxide and charcoal activated Particles as filler in different weight percent (1, 3, and 6) wt. % have been prepared. Chemical resistance test has been done using simple immersion test in different periods of time and the immersion done in different solutions (1N NaOH, 1N HCL and 25 g of NaCl per litter of distilled water). Shore (A) hardness tests were carried out on the prepared samples before and after the immersion into distilled water, (1N HCl) acid, (1N NaOH) and 25 g of NaCl per litter of distilled water with normality (1). The results exhibited increase in chemical resistance and hardnessvalues increase with increasing magnesium oxide and charcoal activated ratio. The maximum hardness was observed in the case of epoxy -6wt% MgOcomposites i.e. 108.8 and least chemical resistance in the case of pure epoxy being 4.885% in NaOH.


Article
Anti-Corrosion Activity of Ephedrine on Mild Steel in Acidic Medium

Author: Shaimaa Basim Khalaf Al-Baghdadi
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2017 Volume: 20 Issue: 1 Pages: 66-69
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

Anti-corrosion activity of ephedrine "2-(methylamino)-1-phenylpropan-1-ol" was investigated by Gravimetric strategy and completed with mellow steel samples in 1M HCl as corrosive solution at different temperatures. The target compound displayed greatest efficiency of 84% at 500mg/L. The outcomes of weight loss method revealed that the target compound represents a one of the best inhibitors for mild steel and these efficiencies expanded with expansion in the concentrations of the ephedrine. SEM (Scanning Electron Microscopy) was utilized examine the steel surface at the most noteworthy erosion hindrance investigated concentration. [DOI: 10.22401/JNUS.20.1.09]


Article
Durability of some Weak Rocks Selected from Nineveh
ديمومة بعض الصخور الضعيفة المختارة من محافظة نينوى

Authors: Mohammed K. Faris --- Amina. A. Khalil --- Suhail I. A. Khattab
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2014 Volume: 32 Issue: 4 Part (A) Engineering Pages: 908-921
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Some rocks are naturally weak, or it becomes weak due to weathering. Durability of weak rocks is one of the most important engineering properties to be evaluated. This study aims to determine the decrease of strength over time due to weathering processes for some weak rocks selected from four different locations within Nineveh. Rock samples were prepared for all types of selected rocks according to American Society for Testing Materials (ASTM) and International Society for Rock Mechanic (ISRM). Physical and mechanical properties of the samples were studied (dry density, absorption, Uniaxial compression test, Brazilian test, Point load test, and Slake–Durability test) in both dry and wet conditions. Slake - durability test used to determine the decrease in strength and weight loss% for studying rock samples using distilled water for all selected rock samples. Baghdad street and Talafare rocks samples were subject to a solution containing solute hydrochloric acid with 5%, and 10%, concentrations.Results show that rock samples taken from Hay-AL-Quds and Hay-AL-Arab can be classified as very weak to weak with low durability, and weak with medium-high durability for samples selected from Baghdad street and Talafar. Results also indicate that there is a reduction in strength of treated rocks due to an increase in the level of weathering of rock. Higher values of reduction pointed out for samples treated with solute hydrochloric acid compared with the case when using distilled water with less effect in 5% concentration than that 10% concentration.

يمكن أن تتواجد الصخور في الطبيعة بصورة ضعيفة أو أنها تصبح ضعيفة نتيجة لعمليات التجوية. تعتبر ديمومة الصخور الضعيفة كاحدى الخواص الهندسية الأكثر أهمية التي تستلزم التقييم. تهدف الدراسة الحالية إلى تحديد مقدار النقصان في مقاومة نماذج من صخور مختارة من أربع مواقع في محافظة نينوى (شارع بعداد، تلعفر، حي القدس، حي العربي). تم تهيئة النماذج للصخور المواصفات العالمية للصخور (ASTM) (ISRM)، درس الخواص الفيزيائية والميكانيكية لنماذج الصخور المختارة (الكثافة الجافة، نسبة الامتصاص، فحص الانضغاط احادي المحور، الفحص البرازيلي، فحص التحميل النقطي، فحص الديمومة والتاكل) للحالتين الجافة والرطبة. تم دراسة ديمومة نماذج الصخور نتيجة تعريضها لدورات من الترطيب والتجفيف من خلال فحص قابلية التآكل باستخدام الماء المقطر لجميع النماذج وكذلك محلول حامض الهايدروكلوريك بنسبة تركيز 5% و 10%لنماذج شارع بغداد وتلعفر.أظهرت النتائج بأنه يمكن تصنيف نماذج الصخور المأخوذة من منطقتي حي القدس وحي العربي على أنها صخور ضعيفة إلى ضعيفة جدا، في حين صنفت نماذج الصخور المأخوذة من منطقتي تلعفر وشارع بغداد إلى أنها صخور ذات ديمومة متوسط إلى عالية. كما أظهرت النتائج أيضا أن هنالك نقصان في مقدار مقاومة التحمل للصخور باستخدام محلول حامض الهايدروكلوريك بمقدار أعلى مقارنة بتحمل نفس الصخور باستخدام الماء المقطر وبنسبة اقل عند التركيز 5% عنه عند 10%.


Article
Corrosion Inhibition of Carbon steel on Hydrochloric acid Using Zizyphus Spina – Chritisi Extract
دراسة الفعل التثبيطي لمستخلص أوراق السدر على الفولاذ الكاربوني في حامض الهيدروكلوريك

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Abstract

Naturally occurring substances are increasingly being tried to used as corrosion inhibitors of metals in acid cleaning processes to replace some toxic and expensive chemicals currently in use. The corrosion inhibition of carbon steel in hydrochloric acid by Zizyphus Spina – Chritis leaves extract was studied using weight loss techniques. Maximum inhibition efficiency and surface coverage were obtained at an optimum concentration. However, an increase in temperature lead to decreased in the inhibition efficiency at the temperature studied. Optimum inhibition efficiency for carbon steel in the presence of Zizyphus Spina – Chritis leaves extract was 99.5%, 75% and 66% at 1%,1%and 2% concentration of the inhibitor at 25oC, 35oC and 45oC respectively. The phenomenon of physical adsorption has been proposed from the activation energy values (55.66KJmol-1). The surface coverage (θ) data augment the above observation and the inhibition is attributed to the physical adsorption of the chemical components of the additive on the surface of the carbon steel. Inexpensive environmentally safe inhibitor formulations indicate have been obtained.

جرت محاولات عديدة لأستخدم المواد المستخلصة من المواد الطبيعية كمانعات تآكل للعديد من المعادن في عمليات التنظيف بالحامض وذلك لاستبدال بعض المواد الكيماوية الغالية والسامة والتي تستخدم لهذا الغرض. لذا تم في هذا البحث دراسة استخدام مستخلص أوراق السدر في تثبيط تآكل الفولاذ الكاربوني في محلول 0.5M من حامض الهيدروكلوريك وباستخدام طريقة الفقدان بالوزن.تم تحديد أقصى كفاءة تثبيط واكبر جزء من المعدن مغطى بالمثبط حيث بلغت أقصى كفاءة تثبيط 99.5% و 75% و 66% وذلك عند تراكيز من المثبط 1% و 1% و 2% وعند درجات حرارة 25م و 35م و 45م على التوالي. حيث بينت النتائج بأن هذا المستخلص قادر على إيقاف ذوبان الفولاذ الكاربوني وبمدى واسع يعتمد على تركيز المضاف وكذلك زمن التعرض للحامض.. كما أكدت حسابات مساحة السطح المغطى (θ) الاستنتاج السابق. وقد بينت النتائج المستحصلة بأن عملية التثبيط تتم من خلال الأمتزاز الفيزيائي للمكونات الكيميائية للمضاف على سطح الفولاذ الكاربوني.


Article
Corrosion of Electrical Submersible Pumps (ESP) In South Rumaila Oil Field

Authors: Dr. Safaa Husain Sahi --- Dr. Talib Abdullah Saleh --- Layla Sideeq Mohamed
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2015 Volume: 16 Issue: 1 Pages: 63-69
Publisher: Baghdad University جامعة بغداد

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Abstract

Rotating cylinder electrode (RCE) is used . in weight loss technique , the salinity is 200000 p.p.m, temperatures are (30,5060,7080Co) . the velocity of (RCE) are (500,1500,3000 r.p.m). the water cut (30% , 50%). The corrosion rate of carbon steel increase with increasing rotating cylinder velocity. In single phase flow, an increase im rotational velocity from 500 to 1500 r.p.m, the corrosion rate increase from 6.88258 mm/y to 10.11563 mm/y respectively. In multiphase flow, an increase in (RCE) from 500 to 1500 r.p.m leads to increase in corrosion rate from 0.786153 to 0.910327 mm/y respectively. Increasing brine concentration leads to increase in corrosion rate at water cut 30%.


Article
Weight loss program outcome of obese attending AL-Kindy obesity research and therapy unit

Author: Faris A. K. Khazaal MBChB CABM FRCP*, Abdul Hadi Leibi MBChB CABS*, Insaf Jasim MBChB PhD*, Zidan alherganiMBChB FRCP**
Journal: Al-Kindy College Medical Journal مجلة كلية الطب الكندي ISSN: 18109543 Year: 2015 Volume: 11 Issue: 1 Pages: 21-24
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: overweight and obesity are the fifth leadingrisk for global deaths. At least 2.8 million adults die eachyear as a result of being overweight or obese. Numerousstudies show that weight loss, even if only 5-10%,significantly improves dyslipidemia, hypertension, diabetesmellitus, risk for osteoarthritis and its symptoms and risk forselected cancers.Objectives: is to evaluate the effect of diet and exerciseprogram on anthropometric and biochemical status of adultobese patients.Methods: descriptive study. 124 adult obese patientsattending Al Kindy obesity research and therapy unit duringDecember 2012 were included. Measurement of Wt, heightHt and WC performed and BMI was calculated. Laboratorytest analysis, on the fasting state, was performed for plasmaglucose, uric acid, Ch, Tg, and HDL, and LDL and VLDLlevels were estimated. Patients were advised aboutdecreasing their weight by decreasing calories intake byabout 500 calories daily with increasing physical activity toone hour of medium tension aerobic exercise for 3 monthsthen reexamined.Results: eighteen point five percents are males and 81.5% are females with mean age of 37.3 years, weight was reduced by 3 kilograms and waist by 6.6 cm and BMI by 1.9Kg/m2 within 3 months. Age groups, 30-39 and 40-49 yearsshowed better response (3.5-4 kg Wt loss), while males lost2.6 kg and female lost 3.8 kg within 3 months. Withreduction of total cholesterol by 17.3 mg/dl and reduction oftotal triglycerides by 24 mg/dl and reduction of LDL by 5mg/dl and of VLDL by 4.3 mg/dl and increment of HDL by1.8 mg/dl. Mean fasting plasma glucose fell by 6.3 mg/dland the uric acid level by 0.13 mg/dl.Conclusions: mean weight loss of this program was modest and middle age group responded to weight loss program better than young significantly, old and males respond less than females but insignificantly. In addition weight loss significantly resulted in correction of lipoproteins, blood glucose, and urate levels.


Article
Corrosion Inhibition of Low Carbon Steel in Sulfuric Acid Using Polyvinyl Alcohol

Authors: Majid I. Abdulwahab --- Ayad B. Ahmed --- Aprael S. Yaro
Journal: Iraqi Journal of Chemical and Petroleum Engineering المجلة العراقية للهندسة الكيمياوية وهندسة النفط ISSN: 19974884/E26180707 Year: 2016 Volume: 17 Issue: 1 Pages: 21-36
Publisher: Baghdad University جامعة بغداد

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Abstract

The inhibitive power of Polyvinyl Alcohol (PVA) was investigated toward the corrosion of carbon steel in 0.2N H2SO4 solution in the temperature range of 30-60˚C and PVA concentration range of 150-2000 ppm. The corrosion rate was measured using both the weight loss and the electrochemical techniques. The weight loss results showed that PVA could serve as a corrosion inhibitor but its inhibition power was found to be low for the corrosion of carbon steel in the acidic media. Electrochemical analysis of the corrosion process of carbon steel in an electrochemical corrosion cell was investigated using 3-Electrode corrosion cell. Polarization technique was used for carbon steel corrosion in 0.2N H2SO4 solutions in presence and absence of the inhibitor investigated. Electrochemical runs were done in the PVA concentrations of 150, 1000, and 2000 ppm and temperatures of 30, 40, 50, and 60˚C. It was shown that the inhibition efficiency for PVA decreased with increasing temperature at a given PVA concentration. On the other hand it was shown that at given temperature the inhibition efficiency of PVA was increased with increasing of PVA concentration in the corrosive acid until a PVA concentration of 2000 ppm was reached. The Maximum inhibition efficiency reached was about 71 % at 30ºC and 2000 ppm concentration, calculated by the weight loss technique. It was indicated also that the corrosion of carbon steel in 0.2N H2SO4 is highly activation controlled and inhibition action is occurring at both anodic and cathodic sites on the metal surface.


Article
Preparation and Investigation of Some New Pyrazole Derivatives as Corrosion Inhibitors for Mild Steel in Acidic Media

Authors: Zahraa Talib Khudhair --- Mehdi Salih Shihab
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2016 Volume: 19 Issue: 2 Pages: 33-42
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

Preparation of some new pyrazole derivatives by using a few steps starting from 4-acetylaniline to prepare azo compound (3). Chalcone derivatives (A1-A3) were obtained by reaction compound (3) with a proper aldehyde(benzaldehyde,4-(N,N-dimethylamino) benzaldehyde, terephalaldehyde). Chalcone derivatives (A1-A3) reacted with a proper hydrazine (hydrazine hydrate, phenyl hydrazine) to yield pyrazole derivatives (B1, B2, B3, B4, B5, B6). All prepared structure compounds were confirmed using spectroscopic and1H-NMR techniques. Prepared compounds (B1, B2, B3, B4, B5, B6) were successfully applied as organic corrosion inhibitors for mild steel in 1M H2SO4 solution at 30oC by using a weight loss method. The results of weight loss measurements showed that corrosion inhibition efficiency by increasing the concentration of organic inhibitors for mild steel in 1M H2SO4 solution at 30oC.

تم تحضير بعض مشتقات البيرازول بعدة خطوات ابتداءا من 4- اسيتايل انيلين لتحضير مشتقات صبغة الازو (3) ومن ثم تم تحضير الجالكونات (A1,A2,A3) بواسطة تفاعل تكاثف الالدول باستخدام الديهايدات مختلفة (البنزلديهايد, ن, ن – ثنائي مثل امينو بنزيلديهايد و الترفثلديهايد). بعد ذلك تم تحضير مشتقات البيرازول (B1,B2,B3,B4,B5,B6) من خلال تفاعل الجالكونات مع الهيدرازين والفينل هيدرازين. تم تشخيص المركبات المحضرة بطرق فيزيائية وتقنيات طيفية. المركبات المحضرة النهائية تم استخدامها كمثبطات لتأكل معدن الحديد المعتدل في وسط حامضي وبدرجة حرارة 30م0. نتائج قياسات طريقة الوزن المفقود لعملية التثبيط كانت ممتازة لتثبيط التأكل في الوسط الحامضي لمعدن الحديد المعتدل حيث اظهرت النتائج التجريبية زيادة كفاءة التثبيط مع زيادة وزن المادة العضوية المثبطة.


Article
1, 2(2, 2-dihydroxy Benzelidenamine) Phenyl Complexes as Corrosion Inhibitor for Carbon Steel in Hydrochloric Acid

Authors: Dina A.Najeeb --- Taghried A. Salman
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2018 Volume: 21 Issue: 3 Pages: 13-23
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

The corrosion inhibition on carbon steel in 1MHCl by 1, 2(2, 2-dihydroxy benzelidenamine) phenyl and its complexes was studied at different concentrations by "weight loss method". Data mark, for the compound shows good performance. These measurements show that the inhibition efficiency obtained by these complexes increased by increasing their concentration. The inhibition efficiency follow the order Co>Ni>Cu. The activation and adsorption thermodynamic parameters were determined and discussed. The surface coverage (Ɵ) of the inhibitors conform "Langmuir adsorption isotherm". (Morphology) of the carbon steel alloy has been examine using "scanning electron microscopy" in existence and inexistence of inhibitor.


Article
Spectrophotometric, Turbidimetric and Gravimetric Estimation of Total Hydrocarbon Contamination of Soil

Authors: Mahmood M. Barbooti --- Aliaa A. Razzak --- Aliaa Majeed
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 2 Part (C) Pages: 192-197
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Petroleum hydrocarbons (PHCs) are among the common contaminants ofland, water and atmosphere. They are sampled and analyzed in their media asgroup of compounds usually referred to as total petroleum hydrocarbons, TPH. Soilsamples were collected from Baghdad and Babylon governorates from potentiallypolluted area near community power generators. Control samples were collectedfrom local gardens. Turbidimetric as well as infrared spectral methods wereemployed for their determination and the obtained results were compared with thatof the gravimetric method. For turbidimetric measurements TPH were extractedwith a solvent mixture (MeOH-EtOH), filtered and transferred into a glass cellcontaining an emulsifier aqueous solution. The TPH form an emulsion with waterthat is stable for certain time. The turbidity was then measured and correlated withthe TPH concentration, following a calibration step using diesel fuel in the sameextraction solvent. For FT-IR spectral investigation, the soil samples wereintroduced to the spectrophotometer in three forms: untreated soil powder; soilpowder after charring at 650o C until a constant weight; and soil extract with CCl4mixed with KBr crystals and dried. The comparison of the spectra indicated the IRabsorption of the hydrocarbon contaminant. The percentage loss on ignition valueswere also recorded and correlated with the results of the turbidimetricmeasurements R2= 0.7721). The soil samples of the gardens were not hydrocarbonfree because of the expected hydrocarbons precipitated from air.

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