ARS | Publication request: Effects of ZDDP and Chlorinated Paraffins on Lubricant Film in Twist Compression Tribotest

Submitted to: Tribology International
Publication Type: Proceedings
Publication Acceptance Date: November 19, 2009
Publication Date: November 19, 2009
Citation: Asadauskas, S.A., Bikulcius, G., Mc Clure, T.G., Mieczkowski, J.R., Biresaw, G. 2009. Effects of ZDDP and Chlorinated Paraffins on Lubricant Film in Twist Compression Tribotest. Proceedings of the International Tribological Conference BALTTRIB' 2009, Kaunas, Lithuania, November 9, 2009.

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 Tribotester (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. Despite big differences in times to failure, samples showed similar surface wear after 10 s run on TCT, per profilometry study. Reduced need for EP additives along with converging prices can benefit vegetable oil utilization in lubricants.