TRIBOLOGICAL BEHAVIOR AND LUBRICATION MECHANISM OF FINE PARTICLES IN THE BASE OIL SN500

Abstract

The using of powders with attractive wear and friction has increased attention industrial sectors and research. In this study the experimental work results of the tribological behavior of base oil SN500 with CuO and ZrO2 as anti-wear and anti-friction hybrid additives powders at concentrations (0.5, 1, 2 and 4) wt. % were obtained and comparing the results with pure oil. Therefore the effect of normal loads and sliding speed under mixed lubrication were studied according to ASTM G-99 pin on disc and ASTM G-77 block on ring principles for friction and wear measurements respectively. The optimum lubrication concluded on the level of concentration of the hybrid powder was at (2) wt. % by the formation of protected boundary layer in the significantly improved i.e. friction coefficient decreased about (20.8%) and the wear rate about (46%) as compared with the case of using pure lubricant oil

Keywords

• lubricating effect
• hybrid additives
• friction
• wear
• tribology