Effect of sliding speed and temperature on the tribological behavior of pongamia oil-based blended lubricant

ABSTRACTThe increase in industrialization has created the demand for petroleum-based lubricants throughout the world. The decrease in availability of mineral oils and their hazards related to the environment created the need to search for the alternate bio-based oils. In this work, the pongamia seed oil is blended with mineral oil (SAE20W40) at 5%, 10%, and 15% ratio for its tribological investigation at different speed and temperature. In terms of coefficient of friction and wear rate, 5% and 10% pongamia oil blends show better results at all sliding speed and temperatures. Fifteen percent of pongamia blend shows the maximum friction and wear among all the blends. Maximum friction coefficient and wear occur at 300 rpm and minimum at 1,500 rpm sliding speed. Minimum drop in the total acid number was also found in the 5% and 10% blends in comparison to 15% blend and conventional mineral. Overall, PB5 and PB10 are suitable lubricants for tribological applications.