Abstract: Conductive polyaniline lithium grease (PANI grease) and silver coating copper material (silver coating material) were prepared. The friction and wear properties of copper based material and silver coating material were investigated by friction and wear testing machine under the conditions of no current-carrying，current-carrying and boundary lubrication. The silver coating material and surface grinding appearence were characterized by XRD, SEM and EDS. The results showed that the silver coating material not only had good antifriction and antiwear properties, but also had stronger conductivity in PANI grease lubrication test under the condition of current-carrying. The excellent antifriction and antiwear properties of the silver coating material were attributed to the dual functions of the protective film and surface softening caused by the current heat effect.

Key words: polyaniline lithium-based grease, silver plating layer, electrical contact resistance, current-carrying Lubrication