Tribological behavior of refined, bleached and deodorized palm kernel as an alternative lubricant

Document Type : Article


Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia


The effects of zinc dialkyl dithiophosphate (ZDDP) concentration on tribological behavior of refined, bleached and deodorized (RBD) palm kernel were analyzed using a pin-on-disk tribotester. RBD palm kernel was selected as base lubricant due to its availability, low price, renewability and environmental friendly. Commercial mineral oil (SAE 40) was used for comparison. The tests were performed at 2.5 m/s of sliding speed under 9.8 N applied load for 60 minutes and temperature at 25  (  2 ). Worn surface of the pin was measured by optical microscope to understand the wear mechanism involved. Experimental results showed that the addition of 5wt% of ZDDP has reduced the coefficient of friction to 21% compared with SAE 40. However, the anti-wear property was still lesser, approximately at 23%. Besides, the tribological behavior of RBD palm kernel was improved with ZDDP additive concentration above 1wt% where the best performance was at 5wt%. At this concentration level, ZDDP additive was able to protect the surface against wear and oxidation, and at the same time reduces coefficient of friction, wear rate and surface roughness values.


Main Subjects

1. Twist, C.P., Bassanetti, I., Snow, M., Delferro, M.,
Bazzi, H., Chung, Y.W., Marchio, L., Marks, T.J.,
and Wang, Q.J. \Silver-organic oil additive for hightemperature
applications", Tribol. Lett., 52(2), pp.
261-269 (2013).
2. Emami, M., Sadeghi, M.H., Sarhan, A.A.D., and
Hasani, F. \Investigating the minimum quantity lubrication
in grinding of Al2O3 engineering ceramic",
J. Clean. Prod., 66, pp. 632-643 (2014).
A.N. Farhanah and S. Syahrullail/Scientia Iranica, Transactions B: Mechanical Engineering 25 (2018) 1169{1178 1177
3. Joseph, D.K. and Sharma, P.V. \Improvement of thermooxidative
stability of non-edible vegetable oils of
Indian origin for biodegradable lubricant application",
Lubr. Sci., 22, pp. 149-161 (2010).
4. Siniawski, M., Saniei, N., Adhikari, B., and Doezema,
L.A. \In
uence of fatty acid composition on the tribological
performance of two vegetable-based lubricants",
J. Synth. Lub., 24, pp. 101-110 (March 2007).
5. Shahabuddin, M., Masjuki, H.H., Kalam, M.A.,
Bhuiya, M.M.K., and Mehat, H. \Comparative tribological
investigation of bio-lubricant formulated from
a non-edible oil source (Jatropha oil)", Ind. Crops.
Prod., 47, pp. 323-330 (2013).
6. Quinchia, L.A., Delgado, M.A., Reddyho , T., Gallegos,
C., and Spikes, H.A. \Tribological studies
of potential vegetable oil-based lubricants containing
environmentally friendly viscosity modi ers", Tribol.
Int., 69, pp. 110-117 (2014).
7. Haseeb, A.S.M.A., Sia, S.Y., Fazal, M.A., and
Masjuki, H.H. \E ect of temperature on tribological
properties of palm biodiesel", Energy, 35, pp. 1460-
1464 (2010).
8. Zulki
i, N.W.M., Kalam, M.A., Masjuki, H.H., Shahabuddin,
M., and Yunus, R. \Wear prevention characteristics
of a palm oil-based TMP (trimethylolpropane)
ester as an engine lubricant", Energy, 54, pp. 167-173
9. Ing, T.C., Mohammed Ra q, A.K., Azli, Y., and
Syahrullail, S. \The e ect of temperature on the
tribological behavior of RBD palm stearin", Tribol.
Trans., 55(5), pp. 539-548 (2012).
10. Syahrullail, S., Izhan, M.I., and Mohammed Ra q,
A.K. \Tribological investigation of RBD palm olein in
di erent sliding speeds using pin-on-disk tribotester",
Sci. Iran. B, 21(1), pp. 162-171 (2014).
11. Lam, M.K., Tan, K.T., Lee, K.T., and Mohamed,
A.R. \Malaysian palm oil: Surviving the food versus
fuel dispute for a sustainable future", Renew. Sustain.
Energy Rev., 13, pp. 1456-1464 (2009).
12. Ghosh, P. and Karmakar, G. \Evaluation of sun
oil as a multifunctional lubricating oil additive", Int.
J. Ind. Chem., 5(7), pp. 1-10 (2014).
13. Syahrullail, S., Azwadi, C.S.N., and Ing, T.C. \The
ow evaluation of billet extruded with RBD
palm stearin", Int. Rev. Mech. Eng., 5(1), pp. 21-27
14. Somayaji, A. and Aswath, P.B. \Antiwear behavior
of ZDDP and
uorinated ZDDP in the presence of
alkylated diphenyl amine antioxidants", Tribol. Trans.,
51(4), pp. 403-412 (2008).
15. Mahipal, D., Krishnanunni, P., Mohammed Rafeekh,
P., and Jayadas, N.H. \Analysis of lubrication properties
of zinc-dialkyl-dithio-phosphate (ZDDP) additive
on Karanja oil (Pongamia pinnatta) as a green lubricant",
Int. J. Eng. Res., 3(8), pp. 494-496 (2014).
16. Jayadas, N.H., Prabhakaran Nair, K., and Ajithkumar,
G. \Tribological evaluation of coconut oil as an
environment-friendly lubricant", Tribol. Int., 40(2),
pp. 350-354 (2007).
17. Asadauskas, S.J., Biresaw, G., and Mcclure, T.G. \Effects
of chlorinated paran and ZDDP concentrations
on boundary lubrication properties of mineral and
soybean oils", Tribol. Lett., 37(2), pp. 111-121 (2010).
18. Ibrahim, R.A. and Ali, W.Y. \Tribological performance
of polyester composites lled by vegetable oils.
[Tribologische eigenschaften von polyesterverbunden
mit p
anzlichen  Olen], Materwiss, Werksttech, 41(5),
pp. 287-292 (2010).
19. Oguz, H., Duzcukoglu, H., and Ekinci, S. "The investigation
of lubrication properties performance of eurodiesel
and biodiesel", Tribol. Trans., 54(3), pp. 449-456
20. Zulki
i, N.W.M., Masjuki, H.H., Kalam, M.A., Yunus,
R., and Azman, S.S.N. \Lubricity of bio-based lubricant
derived from chemically modi ed jatropha methyl
ester", Jurnal Tribologi, 1, pp. 18-39 (2014).
21. Castro, W., Weller, D.E., Cheenkachorn, K., and
Perez, J.M. \The e ect of chemical structure of base-

uids on antiwear e ectiveness of additives", Tribol.
Int., 38(3), pp. 321-326 (2005).
22. Rohatgi, P.K., Tabandeh-Khorshid, M., Omrani, M.,
Lovell, M.R., and Menezes, P.L., Tribology for Scientists
and Engineers (2013).
23. Glovnea, R.P., Olver, A.V., and Spikes, H.A. \Effectiveness
of boundary lubricant additives on some
coated surfaces", Life Cycle Tribol., 48, pp. 135-143
24. Imran, A., Masjuki, H.H., Kalam, M.A., Varman, M.,
Hasmelidin, M., Al Mahmud, K.A.H., Shahir, S.A.,
and Habibullah, M. \Study of friction and wear characteristic
of jatropha oil blended lube oil", Procedia.
Eng., 68, pp. 178-185 (2013).
25. Zhang, W., Zeng, X., and Wu, H. \The tribological
chemistry of a novel borate ester additive and its
interaction with ZDDP using XANES and XPS",
Tribol. Lett., 53(3), pp. 533-542 (2014).
26. Zhan, W., Song, Y., Ren, T., and Liu, W. \The tribological
behaviour of some triazine - dithiocarbamate
derivatives as additives in vegetable oil", Wear, 256(3-
4), pp. 268-274 (2004).
27. Zhang, Z., Yamaguchi, E.S., Kasrai, M., and Bancroft,
G.M. \Interaction of ZDDP with borated dispersant
using XANES and XPS", Tribol. Trans., 47, pp. 527-
536 (2004).
28. Fox, N.J. and Stachowiak, G.W. \Vegetable oil-based
lubricants-A review of oxidation", Tribol. Int., 40(7),
pp. 1035-1046 (2007).
29. Ing, T.C., Ra q, A.K.M., Azli, Y., and Syahrullail,
S. \Tribological behaviour of re ned bleached and
1178 A.N. Farhanah and S. Syahrullail/Scientia Iranica, Transactions B: Mechanical Engineering 25 (2018) 1169{1178
deodorized palm olein in di erent loads using a fourball
tribotester", Sci. Iran., 19(6), pp. 1487-1492
30. Unnikrishnan, R., Jain, M.C., Harinarayan, A.K.,
and Mehta, A.K. \Additive-additive interaction: an
XPS study of the e ect of ZDDP on the AW/EP
characteristics of molybdenum based additives", Wear,
252(3-4), pp. 240-249 (2002).