@Article{, title={Chemical immersion effects on wear property of epoxy reinforced copper powder composites تأثير الغمر الكيميائي على خاصية البلى لمتراكب الايبوكسي المقوى بمسحوق النحاس}, author={Raghad Hamid Hilal رغد حامد هلال}, journal={Journal of Techniques مجلة التقني}, volume={4}, number={1}, pages={E39-E44}, year={2022}, abstract={In this research, the effect of chemical solutions: (sulfuric acid H2SO4, sodium hydroxide NaOH) at (5 M) and distilled water was studied on some mechanical properties. Especially the wear resistance by pin-on-disk and hardness properties for neat epoxy composite and (epoxy - copper powder) composite. That has been prepared by hand mixing (weight ratio = 20%). The samples were immersed in these chemical solutions for different periods (7, 14, and 30) days. Then the hardness by the Shore D method was measured before and after immersion of the samples in acidic, neutral, and alkali solutions. Whereas the hardness was measured by the Vickers method for the wear disk. Wear rate was measured for all samples. The results showed that the neat epoxy composite was more affected by the alkali solution, followed neutral solution, and then the acidic solution by increasing the radius of wear disk (3, 5, 7, 9, and 11) cm, t= 15 min. and the load 5 N. In contrast to the composite material that was more affected by the alkali solution than the acid, neutral solution.

في هذا البحث تم دراسة تأثير الغمر بالمحاليل الكيميائية(حامض النتريك المخفف بنسبة 1:1و هيدروكسيد الصوديوم ب5 مولاري وكذلك الماء المقطر وتأثير الغمر على خاصية البلى والصلادة شور Dلمتراكب الايبوكسي المدعم بمسحوق النحاس (20%نسبة وزنية). الفترة الزمنية للغمر(7,14,30 يوم)وكانت الفترة الزمنية لاختبار البلى 15 دقيقةونصف قطر قرص البلى (3,5,7,9,11)سم والحمل المسلط 5نت . اثبتت النتائج تأثر الايبوكسي بالمحلول القاعدي ثم الماء المقطر فالمحلول الحامضي . على العكس من المادة المتراكبة تأثرت بالمحلول القاعدي ثم المحلول القاعدي فالماء المقطر} }