Tribological behavior of a novel organic molybdenum containing mercaptotriazine as a multifunctional environmentally friendly additive

In this study, we developed a new multifunctional mercaptotriazine-containing organic molybdenum with excellent properties to enhance the tribological performance of biodegradable based oils. The coefficient of friction and wear scar diameter are greatly reduced up to ~40% and ~44%, respectively. Surface analyses reveal that the tribofilm is mainly composed of FeS, FeSO 4 , Fe 2 O 3 , MoO 3 , MoS 2 and FeMoO 4 . Furthermore, the tribofilm also exhibits a layered structure with different chemical compositions, in which the sulfur in the body tribofilm mainly exists in the form of S 2− , SO 3 2− and SO 4 2− , while the sulfur in the subsurface of the tribofilm is mainly composed of S 2− and SO 4 2− . Our findings might pave the way for exploiting the multifunctional and environmentally-friendly lubricating materials.