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Corrosion Inhibition of Steel (St 44-2) by Pomegranate Shells in Acidic Medium

Author: H.A. Abdullah
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2017 Volume: 35 Issue: 4 Part (A) Engineering Pages: 399-405
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Pomegranate shells were investigated as green inhibitors for steel 44-2 in 0.1M HCl at various temperatures (30, 40, 50, and 60) °C using electrochemical technique. Five concentrations of inhibitor were added 4, 8, 12, and 16 ppm. Corrosion tests were performed by Potentiostat at 5 mV.sec-1 scan rate and the data measured by Tafel extrapolation method such as Tafel slopes, corrosion current density and corrosion potential. Inhibition efficiencies were calculated and indicated that 8 ppm was the best concentration for inhibition especially at 60oC, where was 96.47%. Pomegranate Shells behaves as anodic inhibitor type and obeys Langmuir adsorption isotherm. The equilibrium constant of the adsorption-desorption process and the apparent free energy of adsorption confirm the physicsorption of Pomegranate shells. FTIR spectroscopy was used to test film formed on steel surface compared with FTIR spectrum of Pomegranate Shells. These spectra confirm the formation of Fe2+Pomegranate shells complex.


Article
THE EFFECT OF NATURAL MATERIALS ON MECHANICAL PROPERTIES OF COMPOSITE MATERIALS
دراسة تأثير المواد الطبيعية على الخواص الميكانيكية للمواد المتراكبة

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Abstract

This research studied the mechanical properties of orange and pomegranate shells powders reinforced unsaturated polyester with different weight fractions %Wf. The composite specimens were prepared by hand lay-up technique and sectioned according to (ASTM) for tensile, impact, bending and compression tests to obtain modulus of elasticity, ultimate tensile strength, elongation percentage, compression strength, impact energy and fracture toughness of the composite specimens. The results showed that the composite specimens reinforced with pomegranate shells powder give high mechanical properties compared with composites specimens reinforced with orange shells powder.

في هذا البحث تم دراسة الخواص الميكانيكية للبولي استر الغير مشبع المقوى بمسحوق قشور البرتقال والرمان عند كسور وزنية مختلفة. حضرت العينات المركبة بطريقة يدوية وقطعت وفق المواصفات الامريكية لفحص الشد, فحص الصدمة, فحص الانحناء وفحص الانضغاط للحصول على معامل المرونة, اقصى مقاومة شد. نسبة الاستطالة, مقاومة الانضغاط, الطاقة الممتصة ومتانة الكسر للعينات المركبة .النتائج بينت ان العينات المركبة المقوات بمسحوق قشور الرمان تمتلك خواص ميكانيكية اعلى من العينات المركبة المقوىات بمسحوق قشور البرتقال .

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