TitleComparison of tribological performance of zinc dialkyldithiophosphate (ZDDP) in poly-alpha-olefin (PAO) and palm oil-based trimethylopropane (TMP) ester
SourceMITC2015-pp 201-202
AuthorRehan Zahid, H.H. Masjuki, Mahendra Varman, R.A. Mufti, Md. Abul Kalam, Mubashir Gulzar, R. Yunus


Due to environmental legislations, automotive industry is striving hard to shift from mineral/synthetic oils to environmental friendly ones such as vegetable oils. In this study, effectiveness of ZDDP in enhancing the tribological properties of steel/steel contact, when used in combination with palm-oil based TMP ester, has been investigated and the results are compared with that of PAO. Friction and wear experiments were carried out using four-ball tribotesting machine. TMP and TMP+PAO offered low values of friction compared to PAO. In addition, ZDDPderived tribofilm was detected on the interacting surfaces, when TMP+PAO+ZDDP lubricant was used, resulting in decreased wear.


MITC2015-pp 201-202