OBRABOTKAMETALLOV Vol. 23 No. 3 2021 MATERIAL SCIENCE EQUIPMENT. INSTRUMENTS 4 4 2 Fig. 10. Samples of Maslyanit 12 after bench tests in sea water less than 0.5 mm), it was found that there are no traces of tearing, catastrophic wear, melting and other abnormal processes on the friction surfaces. At the same time, wear and tear of the bronze shaft, which was paired with Maslyanit 12, was not detected. Conclusion The study of the tribotechnical properties of materials based on polyamide in the medium of a sea water simulator made it possible: – to choose the test materials on the basis of theoretical surveys; – to develop a test method and experimental equipment; – to perform laboratory tests of chosen materials. It was revealed that the friction pair bronze (9 % Al; 2 % Mn) and Maslyanit 12 has high antifriction properties and wear resistance when operating in a sea water simulator; the wear and friction coefficient of the studied friction pair is less than the metal surface grade of finish; – to verify laboratory test methods in conditions simulating the actual operation modes of the product. It was established that the results of laboratory and bench tests are correlated with each other and allow for the further use of the laboratory test method for the preliminary selection of optimal friction pairs operating in sea water; – to confirm that wear of filled polyamide composite materials of the Maslyanit group in the considered media after the completion of the running-in process occurs mainly by the fatigue mechanism, which is facilitated by the protective film adsorbed on the working surfaces. – to recommend the selected and studied friction pair for use in various options (shaft-plug, sliding guides, etc.) for bearings, thrust bearings, movable supports and guides of construction, shipbuilding, ship repair industries (port and deck mechanisms, process equipment, floating rigs, high-speed hydrofoil passenger ships, propeller and steering devices, ship centrifugal submersible pumps, equipment for oil production platforms, marine fish farms, desalination and power plants, etc.), which are in contact with fresh or sea water.
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