* For correspondence. 242 Journal of the Balkan Tribological Association Vol. 20, No 2, 242–246 ( 2014) Wear in the presence of oil with antiwear additives SYNTHESIS OF TITANIUM TETRAOLEATE AND INVESTIGATION OF ITS ANTI-WEAR PERFORMANCE AS A FRICTION MODIFIER P. KANGALOV a , M. NIKOLOV a *, T. DELIKOSTOV a , M. STOYANOV b a Department of Repairing, Reliability, Mechanisms, Machines, Logistic and Chemical Technologies, University of Ruse, 8 Studentska Street, 7017 Ruse, Bulgaria E-mail: ninag@uni-ruse.bg b Faculty of Technics and Technologies – Yambol, Trakia University, Stara Zagora, 38 Graf Ignatiev Street, 8600 Yambol, Bulgaria ABSTRACT Titanium tetraoleate has been synthesised in order to investigate its properties as a friction modiier. The anti-wear performance of titanium tetraoleate has been tested on a 4-ball machine. Mixtures of 0.25, 0.5 and 1% titanium tetraoleate in mineral motor oil SAE 30 and in synthetic motor oil SAE 5W40 have been prepared. The best results have been obtained at the formulations with modiier concentration of 1%. It has been established that modiier inluence is higher in motor oil SAE 30 (around 15%) while in the synthetic oil SAE 5W40 the effect is lower – around 10%. Keywords: friction modiier, titanium tetraoleate, anti-wear performance, motor oil, 4-ball machine. AIMS AND BACKGROUND The increasing technical requirements to the internal combustion engines and other machines put them in working conditions at high levels of mechanical, ther- mal and chemical pressure. Being a part of the machine design, the lubricating medium has signiicant inluence on the friction and wear parameters. Recently, an effective method of increasing the lubricants quality has become their compounding with speciic organic substances, called ‘friction modiiers’ 1 . Small quantities of them added to the lubricants help the reduction of the coefi- cient of friction and this creates conditions for decreasing the wear, fuel consump-