Determining the intensity of abrasive wear of protective polymer coatings

Solids pumps are used to pump various aggressive media, including abrasive, therefore their parts are subjected to considerable wear. Composites materials are used for restoring and protecting these parts. To determine the proper amount of the polymeric material to recover specific parts it is necessary to determine possible wear of the parts operating under specific conditions. In this paper it was considered. The problem of determining the intensity of abrasive wear of the protective coating of the parts of the pumping equipment was considered in the article. Taking an abrasive particle as a cutting tool by analogy with cutting of metal, the task in determining the abrasive wear of composite materials with different mechanical properties has been solved. A set of data on the intensity of wear of the material used to protect the parts of the pumping equipment has been got. The results were graphed to illustrate the dependence of the abrasive wear on the protective material yield point and on the abrasive particles angle of impact on the surface of the test material. The graphs show that wear increases with the increasing angle of the abrasive material impact. In these dependencies the angle range was stretching from 0°-30°, because further increasing of the abrasive particles angle of impact excludes abrasion wear. The obtained theoretical dependences are supported by experimental results. The proposed method of solution is precise enough to perform engineering calculations. It makes it possible to determine the amount of abrasive wear of any polymeric material based on polyurethane, and also to select the mechanical properties of the protective ma-terial, in particular the selection and composition of the composite material fillers