Study of the tribological behaviors of S, P-containing triazine derivatives as additives in rapeseed oil

A series of S, P-containing triazine derivatives, 2,4-bis-(diethylamino)-6-(O,O′-dialkyl dithiophosphate)-s-1,3,5-triazine, which are potential environmentally friendly lubricating oil additives, were synthesized. The tribological properties as lubricating oil additives in vegetable oil were evaluated using a four-ball tester. The results show that the series of triazine derivatives possess good antiwear performance, excellent load-carrying capacity. These compounds also show good friction-reducing properties. The action mechanism was estimated through analysis of the worn surface with X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM).