Skip to main content
ARS Home » Research » Publications at this Location » Publication #236228

Title: Base Oil-Extreme Pressure Additive Synergy in Lubricants

item Biresaw, Girma

Submitted to: Society of Tribologists and Lubrication Engineers
Publication Type: Abstract Only
Publication Acceptance Date: 2/4/2009
Publication Date: 2/4/2009
Citation: Biresaw, G., Asadauskas, S.J., Mcclure, T. 2009. Base Oil-Extreme Pressure Additive Synergy in Lubricants [abstract]. Society of Tribologists and Lubrication Engineers.

Interpretive Summary:

Technical Abstract: Extreme pressure (EP) additives are those containing reactive elements such as sulfur, phosphorus, and chlorine. In lubrication processes that occur under extremely severe conditions (e.g., high pressure and/or slow speed), these elements undergo chemical reactions generating new materials (tribofilms) that reduce friction and prevent damage to the friction surfaces. EP additives are widely used in lubricants destined for a variety of lubrication applications including metalworking, engine oils, and gear oils. In these formulations, the EP additives comprise 1-20% of the formulations, with the balance being mostly the base oil. In this presentation, investigations into the effect of base oil chemical structure on the effectiveness of various EP additives will be discussed.