Abstract
The progressive cavitation pumps (PCP), also called screw pumps, are frequently used in the petroleum industry for the transport of water, hydrocarbons and other viscous fluids as well as for the extraction of crude oil from wells, due to their continuously improved technological performance. The materials used for the construction of these pumps were described in [1][2][3]. The design and quality requirements are imposed by ISO standards, but the materials with the best tribological behavior are not indicated. In order to choose the couple of materials with minimal abrasive-erosive wear, studies are required on the abrasive effects of the stator and the rotor. In this paper it is analyzed the variation of the intensity of erosive wear depending on the material of the coupling surfaces and the impact speed of the particles that hit these surfaces. For this analysis were used four of the classic models (Finnie, Bitter, Hutchings and Sundararajan) with applicability in all abrasive-erosive environments.