FORMULATION OF REFINED, BLEACHED AND DEODORISED PALM STEARIN WITH ZINC DIALKYL-DITHIOPHOSPHATE ADDITIVE AND ITS TRIBOLOGICAL PERFORMANCE
DOI:
https://doi.org/10.11113/jt.v78.9655Keywords:
RBD palm stearin, ZDDP, coefficient of friction, wear coefficientAbstract
Vegetable oils have recently received worldwide attention for their use as a lubricant base stock that has numerous advantages, including their environmental friendliness. In this study, a refined, bleached and deodorised palm stearin was selected as the base lubricant, and its friction and wear performance were investigated with a pin-on-disk tribotester. The effect of zinc dialkyl-dithiophosphate (ZDDP) additive in concentrations of 1wt%, 3wt% and 5wt% on friction and wear performance were evaluated. Commercial semi-synthetic oil SAE 15W50 was used for comparison purposes. The experiments were conducted at a sliding speed of 1.5 m/s under a normal force of 9.81 N for 60 min. Results show that an increase in ZDDP concentrations improved both friction reduction and wear performance of the lubricant. The coefficient of friction (COF) of RBD palm stearin was reduced approximately at 71% when 5wt% of ZDDP was added and it shows that the friction reduction performance of PS+5wt% (COF=0.039) was comparable to SAE 15W50 (COF=0.035). While, wear coefficient of RBD palm stearin was reduced significantly from 2.08 × 10−3 to 8.89 x 10−5 when 5wt% ZDDP additive was added and it shows that the wear performance of PS+5wt% was better than that of SAE 15W50, 1.94 x 10−4. Further analysis of the wear worn surface with a high-resolution optical microscope was also conducted with a surface profilometer to examine the metallurgy of the pin surface and the roughness of the pin. Â
References
Nagendramma, P., and S. Kaul. 2012. Development of Ecofriendly/Biodegradable Lubricants: An Overview. Renewable and Sustainable Energy Reviews. 16(1): 764-774.
Syahrullail, S., C. S. N. Azwadi, and T. C. Ing. 2011. The Metal Flow Evaluation of Billet Extruded with RBD Palm Stearin. International Review of Mechanical Engineering. 5(1): 21-27.
Arumugam, S. and G. Sriram. 2012. Effect of Bio-Lubricant and Biodiesel-Contaminated Lubricant on Tribological Behavior of Cylinder Liner–Piston Ring Combination. Tribology Transactions. 55(4): 438-445.
Quinchia,L. A., M. A. Delgado, T. Reddyhoff, C. Gallegos, and H. A. Spikes. 2014. Tribological Studies of Potential Vegetable Oil-Based Lubricants Containing Environmentally Friendly Viscosity Modifiers. Tribology International. 69: 110-117.
Sapawe, N., S. Syahrullail, and M. I. Izhan. 2014. Evaluation on the Tribological Properties of Palm Olein In Different Loads Applied using Pin-on-Disk Tribotester. Jurnal Tribologi. 3: 11-29.
Lam, M. K., K. T. Tan, K. T. Lee, and A. R. Mohamed. 2009. Malaysian Palm Oil: Surviving the Food versus Fuel Dispute for a Sustainable Future. Renewable and Sustainable Energy Reviews. 13(6-7): 1456-1464.
Zulkifli, N. W. M., M. A. Kalam, H. H. Masjuki, M. Shahabuddin, and R. Yunus. 2013. Wear Prevention Characteristics of a Palm Oil-Based TMP (trimethylolpropane) Ester as an Engine Lubricant. Energy. 54: 167-173.
Haseeb, A. S. M. A., S. Y. Sia, M. A. Fazal and H. H. Masjuki. 2010. Effect of Temperature on Tribological Properties of Palm Biodiesel. Energy. 35(3): 1460-1464.
Rahim, E. A. and H. Sasahara. 2011. Investigation of Tool Wear and Surface Integrity on MQL Machining of Ti-6AL-4V using Biodegradable Oil. Proceedings of the Institution of Mechanical Engineers Part B: Journal of Engineering Manufacturing. 225(9): 1505-1511.
Hafis, S. M., M. J. M. Ridzuan, R. N. Farahana, A. Ayob, and S. Syahrullail. 2013. Paraffinic Mineral Oil Lubrication for Cold Forward Extrusion: Effect of Lubricant Quantity and Friction. Tribology International. 60: 111-115.
Nik, W. B. W., F. Zulkifli, S. S. Lam, M. M. Rahman, A. A. Yusof, and M. M. Rahman. 2014. Experimental Studies on the Rheological and Hydraulic Performance of Palm Based Hydraulic Fluid. Jurnal Teknologi. 66(3): 7-13.
Razak, D. M., S. Syahrullail, N. Sapawe, Y. Azli, and N. Nuraliza. 2015. A New Approach Using Palm Olein, Palm Kernel Oil, and Palm Fatty Acid Distillate As Alternative Biolubricants: Improving Tribology in Metal-on-Metal Contact. Tribology Transactions. 58(3): 511-517.
Wagner, H., R. Luther, and T. Mang. 2001. Lubricant Base Fluids Based on Renewable Raw Materials Their Catalytic Manufacture and Modification. Applied Catalysis A: General. 221: 429-442.
Zulkifli, N. W. M., H. H. Masjuki, M. A. Kalam, R. Yunus, and S. S. N. Azman. 2014. Lubricity of Bio-Based Lubricant Derived From Chemically Modified Jatropha Methyl Ester. Jurnal Tribologi. 1: 18-39.
Arumugam S. and G. Sriram. 2012. Synthesis and Characterisation of Rapeseed Oil Bio-Lubricant - Its Effect on Wear and Frictional Behaviour of Piston Ring-Cylinder Liner Combination. Proceedings of the Institution of Mechanical Engineers Part J: Journal of Engineering Tribology. 227(1): 3-15.
Barnes, A. M., K. D. Bartle, and V. R. A. Thibon. 2001. A Review of Zinc Dialkyldithiophosphates (ZDDPS): Characterisation and Role in the Lubricating Oil. Tribology International. 34: 389-395.
Jayadas, N. H., K. Prabhakaran Nair, and G. Ajithkumar. 2007. Tribological Evaluation of Coconut Oil as an Environment-Friendly Lubricant. Tribology International. 40(2): 350-354.
Asadauskas, S. J., G. Biresaw, and T. G. Mcclure. 2010. Effects of Chlorinated Paraffin and ZDDP Concentrations on Boundary Lubrication Properties of Mineral and Soybean Oils. Tribology Letters. 37: 111-121.
Mahipal, D., P. Krishnanunni, M. R. P, and N. H. Jayadas. 2014. Analysis of Lubrication Properties of Zinc-Dialkyl-Dithio-Phosphate (ZDDP) Additive on Karanja Oil (Pongamia pinnatta) as a Green Lubricant. International Journal of Engineering Research. 3(8): 494-496.
Azhari, M. A. and F. Tamar. 2015. Physical Property Modification of Vegetable Oil as Biolubricant using ZDDP. ARPN Journal of Engineering and Applied Sciences. 10(15): 6525-6528.
Oğuz, H., H. Düzcükoğlu and Ş. Ekinci. 2011. The Investigation of Lubrication Properties Performance of Euro-Diesel and Biodiesel. Tribology Transactions. 54(3): 449-456.
Waara, P., J. Hannu, T. Norrby, and Ã…. Byheden. 2001. Additive Influence on Wear and Friction Performance of Environmentally Adapted Lubricants. Tribology International. 34(8): 547-556.
Parthasarathi, N. L., U. Borah, and S. K. Albert. 2013. Correlation between Coefficient of Friction and Surface Roughness in Dry Sliding Wear of AISI 316 L (N) Stainless Steel At Elevated Temperatures. Computer Modelling and New Technologies. 17(1): 51-63.
Joseph, P. V. and D. K. Sharma. 2010. Improvement of Thermooxidative Stability of Non-Edible Vegetable Oils of Indian Origin for Biodegradable Lubricant Application. Lubrication Science. 22: 149-161.
Ing, T. C., A. K. M. Rafiq, Y. Azli, and S. Syahrullail. 2012. Tribological Behaviour of Refined Bleached and Deodorized Palm Olein In Different Loads using a Four-Ball Tribotester. Scientia Iranica. 19(6): 1487-1492.
Lin, Y. C. and H. So, 2004. Limitations on Use of ZDDP as an Antiwear Additive in Boundary Lubrication. Triboogy. International. 37: 25-33.
Choi, U., B. Ahn, O. Kwon, and Y. Chun. 1997. Tribological Behavior of Some Antiwear Additives In Vegetable Oils. Tribology International. 30(9): 677-683.
Komvopoulos, K., V. Do, E. S. Yamaguchi, and P. R. Ryason. 2004. Nanomechanical and Nanotribological Properties of an Antiwear Tribofilm Produced from Phosphorus-Containing Additives on Boundary-Lubricated Steel. Journal of Tribology. 126: 775-780.
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