Tribological studies of nanomodified mineral based multi-grade engine oil

Abstract

This research study investigates the tribological behaviour of mineral based multi grade engine oil reinforced with nanoadditives using a pin on disc tribometer under different frictional conditions. Load, sliding speed, and constant sliding distance were selected as parameters to study the tribological properties of the engine oil with and without nanoadditives. Tests were carried under loads of 40N, 60N and 90N at sliding speeds 0.5 m/s, 1.0 m/s and 1.5 m/s. Nanoparticle concentration in the mineral oil was taken as 1.5 wt%. The test results were compared with engine oil with no nanoadditives. The results show significant improvement in the tribological properties of the engine oil. The wear of Aluminium alloy was observed to be increasing with increased value of the load. However the wear was significantly reduced for the same load when oil reinforced with nanoparticles was used. Wear rate for lubrication oil without nanoadditives was also found to be decreased with increase in sliding speed. Experimental results prove that nanoparticles can be used as a multifunctional additive in lubricating oil to enhance its tribological properties.