“…In order to improve specifications of construction equipment, new solutions are constantly being sought and modern materials are invented for the manufacture of elements and details, therefore, there is a need for a scientifically based description of the processes that occur under the action of the processed medium. The wear rate model of work surfaces of the pump column under the action of movable wandering abrasive particles is based on the assumption that, when bumping up against the destructible surface at a certain angle, a solid particle is immersed into it and passes a certain distance along the surface [10,11]. When sliding, it consistently deforms several individual surface areas.…”