Series of triazine derivatives, 2,4-bi-alkoxy-6-(O,O’-dialkyldithiophosphate)-s-1,3,5-triazine, weresynthesized. Their tribological properties as lubricating oiladditives in vegetable oil were evaluated using a four-balltester. The results show that these triazine derivatives possessextreme pressure capacity, and they can improve antiwearand friction-reducing performance of base stock. Theelements chemical states of the worn surface were estimatedthrough X-ray photoelectron spectroscopy (XPS) andscanning electron microscope (SEM). The results show that aprotective film containing sulphide, phosphate and someorganic nitrogen compounds was formed on the worn surfaceduring the lubrication process, and the film possessesextreme pressure and antiwear properties.
