Effect of Base Oil Nature on the Operational Properties of Low-Temperature Greases
Yaroslav V. Porfiryev, Sergey Shuvalov, P. S. Popov, Dmitry S. Kolybelsky, Daria Petrova, Е. В. Иванов, B. P. Tonkonogov, В. А. Винокуров
Abstract
Studies of the physicochemical characteristics, group, and fractional composition of low-viscosity base oils with various nature were carried out. The influence of the composition of these oils on their low- and high-temperature characteristics was studied. Studies of the influence of the nature and composition of the dispersion medium on the physicochemical properties of low-temperature greases (LTG) thickened with lithium soap of stearic acid have been carried out. The possibility of expanding the operating temperature range and improving the antiwear properties of low-temperature greases through the combined use of low pour point mineral oil and high-index hydroprocessing oil has been found out. For the first time, the ability to predict the viscosity-temperature and tribological characteristics of lithium LTG based on standard methods for analyzing base oils are established.