Properties of Puma and Buksol lubricants modified by inorganic additives of binary polyphosphates

Results of investigations of tribotechnical and physicochemical properties of plastic lubricants, which are based on Puma and Buksol and used in heavy duty friction units of railway equipment, are presented. The search for new multipurpose polymeric additives of the inorganic nature was carried out based on physicochemical studies of phase diagrams of multicomponent systems. The influence of Puma and Buksol with the synthesized additives on characteristics of the process of friction is studied. Judgments about the mechanism of antifrictional and antiwear effect during work with these greases are stated. The base of this mechanism is the interaction of flexible links of anions of polyphosphate chains with a surface of metal. As a result, the layer of secondary structures is formed on the surface that protects the metal from wear.