Synergistic effects of phosphate ionic liquids and octadecylaminen-oleoyl sarcosinate as lubricating grease additives

A detailed study on the synergistic effects of phosphate ionic liquids (ILs) and rust inhibitor (octadecylaminen-oleoyl sarcosinate (T711)) in the complex lithium grease (G) at room temperature and 100°C is presented in this paper. The results indicate that the hybrid additives (T711-ILs-G) showed better friction-reducing and antiwear properties than single additives (T711-G and ILs-G). In the case of T711-ILs-G, the presence of T711 can prevent rustiness of the worn surface so the ILs can easily react with the exposed substrate surface and form tribological films on the sliding surfaces.