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Abstract
Combining an organic molybdenum compound with a zinc dialkyl dithiophosphate (ZDP) antiwear additive can significantly reduce kinetic friction at loads in the antiwear regime as determined in laboratory, 4-ball wear tests. Both molybdenum dithiophosphates and dithiocarbamates are effective. The friction and wear benefits are independent of the ZDP present. Adding a high total base number (TBN) metallic detergent can greatly enhance the high load antiwear behavior of the three component blend whereas lower TBN detergents do not. Unfortunately, ashless dispersants can destroy the observed benefits. The performance improvements obtained with organic additives could not be duplicated by adding specific inorganic solids, either singly or in combination.
Presented at the 35th STLE/ASME Tribology Conference in Fort Lauderdale, Florida October 16–19, 1989
Notes
Presented at the 35th STLE/ASME Tribology Conference in Fort Lauderdale, Florida October 16–19, 1989
