PREPARATION AND TRIBOLOGICAL BEHAVIOR OF OIL-SOLUBLE CERIUM DIOCTYL DITHIOCARBAMATE

In this paper, an oil-soluble rare earth compound, cerium diocytl dith iocarbamate, was synthesized and used as an antiwear and extreme press ure additive for lubricating oils. Its tribological performances were evaluated with a four-ball machine and a ring-on-block rig. In additio n, surface analyses with Auger electron spectroscopy and X-ray photoel ectron spectroscopy were also conducted to study the surface film form ed by the additive under boundary lubrication conditions. The test res ults showed that the additive exhibited good friction-reducing ability and antiwear property and excellent extreme pressure performance. Sur face analyses further disclosed the coexistence of organic film, oxida tion film, chemical reaction film and diffusion layer on the rubbing s urface.