Оценка эффективности работы сульфонатных присадок в смазочных маслах
DOI: 10.32758/2782-3040-2024-0-2-66-70
УДК 621.892.85
Yakimova S.M., Peskovets A.V., Bagdasarov L.N. (Gubkin Russian State University of Oil and Gas, Moscow, Russia)
Keywords: motor oils, sulfonate additives, sulfonates of various alkalinity
Abstract. The work carried out a comparative assessment of the effectiveness of domestic calcium sulfonates of various alkalinity (150, 300 and 400) in the concentration range of 1-3% by weight in base oils of different nature, but of the same viscosity. The obtained oil samples were subjected to high-temperature oxidation and the physico-chemical properties were determined before and after oxidation, with special attention being paid to the change in acid and base numbers. It was found that isoparaffin base oil is more resistant to thermal degradation compared to poly-α-olefin oil. The results of comparative studies of samples of oils with additives before and after oxidation showed that the optimal concentration of calcium sulfonate, which ensures minimal change in physico-chemical properties after oxidation, is 3% by weight. Moreover, both medium- and ultra-alkaline calcium sulfonate can be used.