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Four triazine mantic acid derivative additives were synthesized, and their tribological properties in rapeseed oil (RSO) were investigated with a four-ball tester. The results showed that the emulsions prepared with thiotriazine derivatives had excellent tribological properties. For the same S content, the antiwear performance was enhanced by increasing the carbon chain length at low load and deduced by increasing the carbon chain length at high load. The superior antiwear performance was attributed to forming the organic sulfide and nitrogen adhering layer, moreover, under low load, the thiotriazine xanthate derivatives containing a longer substituent chain would be hardly damaged during sliding, and the branch chain on the substituent group would be beneficial to enhance the tribological properties of triazine xanthine derivatives. Sulfur-containing triazine derivatives have a good corrosion inhibition effect for Q235 steel because they contain N, O, S, and other active sites. These heteroatoms have unshared lone pair electrons, which can coordinate with the unoccupied orbital of Fe atoms to form covalent bonds and prohibit the corrosive media from contacting the surface of the Q235 steel, thus inhibiting the corrosion processes.

Evaluation of the tribological and anticorrosive properties of triazine derivatives in emulsion