Tribological performance of Quinazolin-4-ones derivatives as lubricating oil additives in liquid paraffin

The load-carrying capacity, anti-wear and friction reduction properties of two new quinazolin-4-ones derivatives respectively added to the liquid paraffin as an ashless additive without Phosphorus and Sulfur were evaluated using a four-ball test machine. The results indicate that both additives possess good load-carrying capacities, anti-wear and friction reduction properties. The surface topography of the rubbed surface was investigated by scanning electron microscopy (SEM) and the chemical nature of the anti-wear films generated on the steel counter-face was explored by X-ray photoelectron spectroscopy (XPS).