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New data on the mechanism of antiwear action of zinc dithiophosphates in lubricating oils
Author(s) -
Vipper A. B.,
Karaulov A. K.,
Mischuk O. A.
Publication year - 1994
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.3010070108
Subject(s) - zinc , chemistry , copper , chemical engineering , organic chemistry , engineering
Abstract ZDDP reacts with oil‐soluble copper salts to form complex compounds and these compounds can substantially surpass the initial additive in the effectiveness of antiwear and antioxidant action. Application of AES allows us to establish the influence of ZDDP and complex compounds formed by it on the structural state of the friction surfaces. The specific nature of action of these complex compounds lies in minimisation of the oxidation processes in the surface microvolumes of the lubricating medium, the consequence of which is the localisation of tribo‐chemical processes of secondary structure‐film formation in the thinner layers. On the whole, the results obtained offer evidence of the existence of certain interrelations and generality of the processes producing antiwear and antioxidant action by zinc dithiophosphate additives in lubricating layers.