This research has presented a solution to the problem faced by alloys: the corrosion problem, by reducing corrosion and enhancing protection by using an inhibitor (Schiff base). The inhibitor (Schiff base) was synthesized by reacting of the substrates materials (4-dimethylaminobenzaldehyde and 4-aminoantipyrine). It was diagnosed by infrared technology IR, where the IR spectrum and through the visible beams proved that the Schiff base was well formed and with high purity. The corrosion behavior of carbon steel and stainless steel in a saline medium (artificial seawater 3.5%NaCl) before and after using the inhibitor at four temperatures: 20, 30, 40, and 50 C° was studied by using three electrodes potentiostat. The corrosion behavior was studied by cathode and anode polarization through which all corrosion parameters were investigated which include: corrosion current icorr (1341× 10-7- 5393 × 10-9A/cm2), corrosion potential Ecorr (-1.031- -0.227 mV vs SCE) , corrosion rates CR (0.658-0.007 mm.y-1), inhibition efficiency %IE (92-98%), and energy activation barriers Ea (4.709-26.733 kJ/mole). The thermodynamic and kinetic properties of the corrosion behavior of these two metals under study, which include: enthalpy ∆H*(2.153-24.176 kJ/mole), entropy ∆S*(-197 -156 J/mole), and free Gibbs energy ∆G*(59.87-74.56 kJ/mole) before and after using the inhibitor, were also studied.
Find extract This research aims to find out (after learning strategy cells in the development of critical thinking and reflective thinking at the fifth-grade students in the geographic literary material). And follow researcher Almhnj demo for the purpose of achieving the goals of current research and design on an experimental group and a control with a test group after me and adopted chose researcher sample Find a way Mqsidih students of junior high Kadhimiya Boys of the breeding Baghdad / Karkh II and to verify the effectiveness of the search coined researcher hypotheses following cases: - 1. No statistically significant between the mean scores of the experimental group and the students taught her students that strategy differences (lea
... Show Moreتعد الضريبة مصدراً مهماً لتحقيق الاهداف الاقتصادية والاجتماعية والسياسية للدولة ولذلك فان مشكلة التهرب الضريبي تعد اهم المشاكل التي ينبغي معالجتها من خلال معرفة اسبابها . ان وجود مشكلة التهرب الضريبي في العراق يرتبط بمجموعة من الاسباب والدوافع الكامنة وراء ظهور هذه المشكلة والتي لا نستطيع ان نلقي بتباعها على تخلف النظام الضريبي من حيث تشخيص الاختلالات في الادارة الضريبية تارة بل يجب ابراز عيوب التشريع الض
... Show MoreThe urban Gentrification is an inclusive global phenomenon to restructure the cities on the overall levels, the research to propose a specific study about the concept of urban Gentrification in the cities and showcasing its, specifications, and results, and how to deal with the variables that occur on cities through improvements as part of urban renewal projects, then the general axis of the research is shrinked, choosing the urban centers as the most important areas that deal with the urban Gentrification process due to its direct connection with indivisuals and social changes, and to process the specific axis of the research theses and studies will be showcased that discuss the topic in different research directions, and emerged
... Show MoreThe wall of Eastern side considers one of the important prominence architect sign of Baghdad city through Abbasid era , it is surrounded by many shops, houses , the work had started in the period of caliph( Al-Mustathher Billah )
يعد الاهتمام بأصحاب الهمم مطلب ديني لجميع الأديان ومطلب اجتماعي لانهم جزء أساسي من المجتمع ينبغي ان يحصلوا على فرصتهم وحقوقهم كباقي افراد المجتمع، فضلا عن كونه مطلب تربوي، إذ يعاني التلاميذ أصحاب الهمم من مشكلات عديدة وذلك لا سباب ترجع لخصائصهم وصفاتهم الخاصة التي ولدوا بها أو اكتسبوها بعد الولادة لسبب من الأسباب، لذا نجدهم يعانون من صعوبات في اكتساب المهارات والخبرات الحياتية بصورة عامة والتعليمية بصورة
... Show Moreاشكالية بناء ثقافة مشاركة في الوطن العربي
Los lingüistas no árabes suelen quedar perplejos a la hora de interpretar el fenómeno de Al-ḍdad, −normalmente traducido en español como palabras autoantónimas (1)− en la lengua árabe, en el que los arabistas, y entre ellos los españoles, han quedado sombrosos ante este fenómeno. El jefe del tribunal de la defensa de mi tesis me pidió que le explicara este fenómeno según mi teoría “El esquema básico de la referencia”; pues me dijo que no podía imaginar que una palabra tuviera dos significados opuestos, y en ese momento le expliqué la palabra albayn البين que significa la separación, o la relación o el enlace que comentar
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