A new non-S,P benzotrizole alcohol derivative(EBP) is synthesized in this paper,and its tribological properties as additives in hydrogenation oil are examined with four-ball tester.Results indicate that the synthesized additive possesses good tribological capacity,and it is a kind of non-S,P environmental protection lubricating oil additive.Worn surface morphology and element distribution of steel ball are analyzed by scanning electron microscopy(SEM).Results show that a film containing N and O is formed on...