Journal
TRIBOLOGY INTERNATIONAL
Volume 43, Issue 12, Pages 2268-2278Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2010.07.016
Keywords
ZDDP; Base oil polarity; Friction; Reaction layer thickness
Categories
Funding
- EC [035589]
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ZDDP blended in two base oils with different polarities were tested in mixed rolling-sliding conditions. The results showed significant differences in friction and wear when the additive is blended in the different oils. When ZDDP is blended in a non-polar base oil, the additive molecules have a better access to the steel surface, leading to higher adsorption rates than when ZDDP is blended in a polar oil, resulting in the formation of thicker ZDDP-derived reaction layers and influencing tribological performance. These results indicate the importance of base oil polarity on the ability of ZDDP to reach the surface and the influence on tribological performance. (C) 2010 Elsevier Ltd. All rights reserved.
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