Tribological Synergy Study of a Benzotrizole Ester Derivative and Tributhyl Phosphate

A novel non-phosporus benzotrizole derivative ( BTB) was synthesized,and the tribological properties of BTB,commercial additive tributhyl phosphate (TBP) and mixtures of BTB and TBP with different mole ratios as additives in liquid paraffin were examined with four-ball tester.Worn surface morphology and element chemistry configuration of steel ball were analyzed by scanning electron microscopy with EDS.Results indicate that all additives increased the load-carrying capacity of the base oil,and possess antiwear and antifriction performances of the base oil.Combination of BTB and TBP showed synergistic effect in load-carrying,antiwear and friction-reducing in base oil.The additives reacted with counterface metal and generated a boundary lubricating and protecting film which improved tribological properties of the base oil.