Research Title: The study of activation energy of corrosion in eutectic mixture base lubricants
Author: Essa I. Ahmed
Abstract: Due to the difference in the ionic nature of mineral base oil and Deep Eutectic Solvents (DESs), corrosion studies of base lubricants based on DESs should be addressed while their lubrication studies are performed. The activation energy (Ea) of corrosion for iron are determined in Ethaline (ethylene glycol + choline chloride), Glyceline (glycerol + choline chloride), Reline (urea + choline chloride) and Oxaline (oxalic acid + choline chloride). Corrosion current densities (icorr) are measured at 298K, 303K, 313K, 323K, 333K and 343K using linear sweep voltammetry (LSV). icorr are extracted from Tafel potential – current plots, then other plots between ln icorr against 1/T have been made. Finally, Ea are determined from the slope of plots between icorr and 1/T. These values represent how iron corrodes in these liquids if they are heated while applied as lubricants. It was found that the energy of activation of iron in these liquids follows their easiness of hydroxyl proton loss which occurs during their heating.
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Proceeding Book of ICASEE
5th year , 7 – 9th April, 2018