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United States Department of Agriculture

Agricultural Research Service

Title: Effects of ZDDP and Chlorinated Paraffins on Lubricant Film in Twist Compression Tribotest)

item Asadauskas, Svajus
item Bikulcius, Gedvydas
item Mcclure, Ted
item Mieczkowski, James
item Biresaw, Girma

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 11/20/2009
Publication Date: 11/20/2009
Citation: Asadauskas, S.J., Bikulcius, G., Mcclure, T.G., Mieczkowski, J.R., Biresaw, G. 2009. Effects of ZDDP and Chlorinated Paraffins on Lubricant Film in Twist Compression Tribotest [abstract]. International Conference BALTTRIB'2009, Kaunas, Lithuania.

Interpretive Summary:

Technical Abstract: Zinc Dialkyl Dithio Phosphate, Chlorinated Paraffins and other Extreme Pressure (EP) additives are used in oils for severe boundary lubrication applications, such as metal forming or gears. Twist Compression Tester (TCT) was employed (steel-on-steel) to evaluate EP additives at 3 to 20% wt. in vegetable and mineral oils of similar viscosity. TCT times to failure compared the ability of lubricant films to withstand lubricant starvation conditions at 200 MPa. Data showed that more than double the level of EP additives were needed in mineral oil to achieve the same performance as 5% in vegetable oil. The findings correlated well with 4-ball EP results. Addition of 20% vegetable oil improved the lubricity of EP blends in mineral oil dramatically. Despite big differences in times to failure, samples showed similar surface wear after 10 second run in TCT, based on profilometry study. Reduced need for EP additives along with converging prices can benefit vegetable oil utilisation in lubricants.

Last Modified: 05/26/2017
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