Abstract
The electrochemical reactivities of four commercial zinc organodithiophosphate (ZDP) antiwear additives, each blended with a common mineral oil, were measured during thermal decomposition tests.
The results imply that electrochemical reactions between the decomposition products of ZDP and the electrode surfaces produce surface coatings on cast iron electrodes.
This observation suggests that electrochemical methods might be useful tools for understanding the mechanism by which ZDPs reduce wear. The electrochemical reactivity of the blends was proportional to the thickness of surface coatings formed on the electrodes at the end of the test, and inversely proportional to the ZDP'S decomposition temperatures. The effects of oxygen, oleic acid concentration, and surface coating on the electrochemical reactivity were measured.
Presented as a society of Tribologists and Lubrication Engineers paper at the STLE/ASME Tribology Conference in San Antonio, Texas, October 5–8, 1987
Notes
Presented as a society of Tribologists and Lubrication Engineers paper at the STLE/ASME Tribology Conference in San Antonio, Texas, October 5–8, 1987