Abstract
PHYSICOCHEMICAL PROPERTIES OF LITHIUM-BASED GREASE
*Zafar Iqbal, Zareen Ghafoor, Muhammad Usman Sabri and Mubeen Akhtar
ABSTRACT
Lithium-based grease was prepared by using stearic acid as thickener from auto oil 650. Concentrations 12, 15, 20 and 25% stearic acid was applied and grease was evaluated for cone penetration and drop point. Results revealed that cone penetration of grease was decreased 241, 239, 191 and 181 1/10 mm respectively for 12%, 15%, 20% and 25% stearic acid. While drop point increase 82 °C, 97 °C, 119 °C, and 125 °C respectively by increasing concentration of thickener from 12%, 15%, 20% and 25%. Furthermore, FTIR analysis was performed to observe the lithium bond, and carboxyl peaks, these peaks were clearlyshown in all the FTIR spectra, which confirm the reaction of lithium hydroxide and carboxylic acid.
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