Gear pumps are an important element of many production systems and their replacement in case of failure can be quite expensive, so it is important to have a modern and well-tuned technology for their recovery. There are many methods for restoring the pump's performance, depending on the reason that led to its failure. (Research purpose) The research purpose is in determining what causes most often lead to loss of pump performance, and developing a recovery method that provides the greatest post-repair service life of the pump and low cost of repair. (Materials and methods) Authors took into account that the applied coatings must have sufficient adhesion strength and resistance to mechanical, thermal and corrosion loads during operation. It was found that most often significant leaks of the working fluid, leading to failure, occur due to an increase in the gap between the inner surface of the housing and the gears due to active wear of the housing wells. Authors determined that the method of electric spark treatment of worn-out housing wells is best suited to perform the task (a large post-repair resource and low costs). (Results and discussion) It was found by laboratory studies of the adhesion strength of electric spark coatings with various electrodes that the best transfer of the material to the substrate is provided by bronze electrodes BrMKts3-1. It was noted that the coatings applied using the BrMKts3-1 electrode have high strength properties. (Conclusions) Research conducted in the center for collective use "Nano-Center" VIM confirmed the possibility of effective recovery of the gear pump by electric spark treatment.

In practice, a large number of methods for obtaining metal powders are known, their diversity is due to the technological capabilities of manufacturing powders in several ways from different types of raw materials, as well as different requirements for the characteristics of powders for various fields and conditions of application. Metal powders in most cases are a secondary product, the properties of which are affected by the manufacturing method, so the theoretical foundations of their production occupy an important place in the processes of powder metallurgy. (Research purpose) The research purpose is in analyzing existing methods for obtaining metal powder materials and develop a new energy-and resource-saving method for obtaining powders, such as electroerosive dispersion. (Materials and methods) Authors have studied literary sources, works of prominent scientists and specialists on the subject of research. (Results and discussion) The article presents the main methods of powder production: mechanical and physical-chemical, as well as a relatively new method of electroerosive dispersion. More productive methods of obtaining powders are being introduced into production, in which considerable attention is paid to methods of cleaning powders from oxygen and carbon, controlling the shape of particles and their sizes. (Conclusions) Analysis of existing methods for obtaining powder materials has shown that they do not fully meet the requirements for quality composition of new technological solutions, in particular, additive technologies. The development of fundamentally new methods for obtaining powders, such as electroerosive dispersion, is a promising direction that makes it possible to obtain powders from almost all conductive materials, adjusting the size and shape of granules.