Rheological behavior of the lubricants favoring the formation of thin layers by selective transfer in the frictional couples

Abstract

During the friction process of certain materials and in the presence of some adequate lubricants (technical glycerin), the wear phenomenon manifests as a material transfer from an element of a frictional couple on the other, in the contact areas (forming a selective layer), and therefore, can function in conditions of selective transfer. This phenomenon lasts until it reaches an optimal thickness, and after that, the transferred layer may return totally or partially to the initial element. In the contact points of the frictional couples that function with the selective transfer, several physical–chemical processes take place that favor the phenomenon. An important role in the functioning of the frictional couples with a selective transfer is rheological behavior that it has the lubricant. This paper analyzes the behavior and some of the rheological properties of the technical glycerin in the frictional couples what functioning with the selective transfer, technical glycerin being the lubricant that contributes sure, to the triggering of this phenomenon.