Lubrication under charged conditions

Understanding on the lubrication properties under charged conditions is not only one of the important fundamental research directions in the lubrication field, but also is of great significance in some newly-emerging applications. This paper presents a review of important research progresses on charged lubrication in recent years. First, the lubrication and friction behaviors in different lubrication states under charged conditions, as well as representative lubrication instabilities at charged interfaces are reviewed. Subsequently, two relevant applications, i.e., charged bearings and electric contact lubrication systems, are introduced. Finally, a brief summary and future outlook of the researches on charged lubrication are given.