Comparison of the Relative Wear Performance of Neutral and Basic ZnDTP Salts

Autor:	P. R. Ryason, E. Q. Labrador, T. P. Hansen, E. S. Yamaguchi
Rok vydání:	1996
Předmět:	Materials science Mechanics of Materials Mechanical Engineering Metallurgy Inorganic chemistry Commercial Oils Surfaces and Interfaces Carbon black Antiwear additive Surfaces Coatings and Films Tribometer
Zdroj:	Tribology Transactions. 39:220-224
ISSN:	1547-397X 1040-2004
DOI:	10.1080/10402009608983524
Popis:	Zinc dithiophosphates (ZnDTPs) have been used as the main antiwear additive in automotive engine oils for many years. They consist of mixtures of neutral and basic ZnDTP salts. Until now, the relative wear performance of the neutral and basic ZnDTP salts has not been reported, despite the fact that these materials are ubiquitous in commercial oils. In this paper, the relative wear performances of neutral and basic ZnDTP salts are compared using a pin-on-disk tribometer, with oils containing carbon black, a soot proxy. Examples of primary, secondary, and aryl ZnDTPs are studied; thus, the entire commercial range of ZnDTPs are examined. Pure neutral and basic ZnDTP salt molecules were synthesized for this work. The conclusion reached was that the friction behavior and the wear behavior of each neutral and basic ZnDTP pair were indistinguishable. A possible reason for this observation is given. Presented at the 50th Annual Meeting in Chicago, Illinois May 14–19, 1995
Databáze:	OpenAIRE
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