An Increase in the Durability of Pumping Equipment

This study analyzed the cavitation-erosive wear of pump parts used for pumping aggressive substances with sodium chloride at different concentrations. The robot used structural materials to produce parts that may come into contact with these aggressive media and are subject to intense wear. It has been established that the leading cause of cavitation-erosive wear is a micro-impact cyclic infusion of liquid and its corrosive activity, which leads to further destruction of materials. To carry out this process and select appropriate materials, an experimental setup was set up, which made it possible to carry out mechanical reinforcement of parts and the corrosive infusion of media onto them. The fluid influx into the parts’ surface energy and dislocations’ discharge in a thin surface ball was observed. It has been shown that the presence of chlorides in the media sharply reduces the corrosion resistance of materials. Cavitation leads to accumulations of dislocations, which destroy the surface of parts inherited from the cyclic process. The intensity of this process depends on the concentration of sodium chloride in the medium. The work proposes a solution based on the structural-energy theory to increase the intensity of cavitation-erosive wear. It is recommended that, before preparing pump parts that come into contact with sodium chloride, be prepared to ensure more significant resistance to cavitation-erosive wear.