Tribological Properties and Worn Surface Analysis Generated by Sulfur-and Phosphorus-free Molybdenum-containing Water-based Lubricant

摘要

The development of environment-friendly water-based lubricants has been paid more and more attention in modem manufacturing due to environmental concern and human health.In this paper,several water-soluble molybdenum-containing additives (WMCAs) were synthesized,and characterized by Fourier transform infrared (FTIR),scanning electron microscopy (SEM),and X-ray photoelectron spectroscopy (XPS).The tribological properties of WMCAs in water were evaluated by a four-ball tester.The results indicated that WMCAs exhibited beneficial effect on the anti-wear and friction-reducing properties of water under all tested concentrations,which could be attributed to organic nitrogen compound,iron oxides and MoO3 in WMCAs tribofilm.