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Antifriction action of lubricant additives
Author(s) -
Vipper A. B.,
Bartz W.,
Karaulov A. K.,
Mischuk O. A.,
Lukinyuk M. Yu
Publication year - 1995
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.3010070305
Subject(s) - lubricant , auger electron spectroscopy , materials science , friction modifier , composition (language) , metallurgy , thermal stability , chemical engineering , composite material , engineering , linguistics , philosophy , physics , nuclear physics
The influence of antifriction additives for engine oils on fuel economy in gasoline engines has encouraged an interest in research into their action mechanisms. The influence of additives of different types on the antifriction properties of engine oils has now been investigated; additives have been discovered which effectively increase thermal stability of the lubricating layers and decrease friction coefficient, even at high temperatures. The structure and composition of the surface layers of friction pairs have been studied with Auger electron spectroscopy. The inter‐relationship between the effectiveness of the antifriction action of the additives and their influence on the thickness and the composition of the surface layers has been ascertained. The most effective antifriction action was obtained where the thickness of the surface layers was reduced within certain limits, and where there was an optimisation of the oxygen and sulphur content. Certain regularities were established, since they were noticed while testing antioxidant, antiwear, antifriction, and detergent additives of different composition.