Розвиток основ еволюційної моделі фретиг-корозії з позицій фізичної хімії та хімії твердого тіла із урахуванням факторів зовнішнього впливу
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Файли
Дата
2018
Автори
Ганзюк, А.Л.
Олександренко, В.П.
Hanzyuk, A.L.
Oleksandrenko, V.P.
Назва журналу
Номер ISSN
Назва тому
Видавець
Хмельницький національний університет
Анотація
Проведено аналіз впливу різних зовнішніх факторів на експлуатацію автомобільної техніки з точки зору
надійності вузлів кріплення та фретинг-процесів. Розглянуто основні етапи трибохімічних процесів
деформаційної моделі, механізм фретинг-процесів та запропоновано спосіб кількісного опису перебігу
трибохімічних реакцій на поверхнях контактуючих тіл з урахуванням хімічної активності газів та радикальних
частинок водного середовища. У результаті проведених теоретичних та експериментальних досліджень
запропоновано динамічну модель фретинг-процесу з урахуванням впливу зовнішнього рідинного середовища.
The analysis of the influence of various external factors on the operation of automotive equipment from the point of view of the reliability of mounting nodes and fretting processes that occur in these nodes is carried out. The regularities of the process of fretting processes with the further development of the evolutionary model in nominally immobile compounds from the standpoint of physicalchemistry and solid-state chemistry, taking into account the influence of the external fluid medium, are substantiated. In addition to the reactions between the solid surface and the gaseous phase, solid phase transformations play a significant role in the formation of the final reaction products. Any chemical process involves the presence of contact between the reacting particles. Such contacts arise in liquid or gaseous phases. In solid phases, the direct contact of the reacting particles is possible only at an initial time, after which, as a result of fretting-corrosion, a layer of oxide separates the reagents occurs, and subsequent reaction proceeds through the mass transfer of atoms through the layer of the formed product. The junctions of units of automobile engineering are under the influence of significant changeable loads, which eventually leads to the emergence of microscopes into which the environment is impregnated - water with various impurities. As a result of cyclic loading in the liquid, which is in the micro-gap, there are cavitation processes. As a result of the experimental tests, the change of water parameters, namely: hydrogen index and oxidative reduction potential of water from the duration of treatment by cavitation, and their change in time after treatment with cavitation, were investigated. The main stages of the tribochemical processes of the deformation model, the mechanism of fringing processes are considered, and the method of quantitative description of the course of tribochemical reactions on the surfaces of contacting bodies is proposed, taking into account the chemical activity of gases and radical particles of the aqueous medium. As a result of theoretical and experimental researches, a dynamic model of the fretting process was proposed, taking into account the influence of the external fluid medium, and a promising direction in the fight against fretting-damages in nominally-fixed joints of machine parts, namely the use of soft coatings based on lead, tin , cadmium, which have a low yield strength and are able to change the coefficient of friction on the contact surfaces, and also can absorb a certain part of the energy of vibration.
The analysis of the influence of various external factors on the operation of automotive equipment from the point of view of the reliability of mounting nodes and fretting processes that occur in these nodes is carried out. The regularities of the process of fretting processes with the further development of the evolutionary model in nominally immobile compounds from the standpoint of physicalchemistry and solid-state chemistry, taking into account the influence of the external fluid medium, are substantiated. In addition to the reactions between the solid surface and the gaseous phase, solid phase transformations play a significant role in the formation of the final reaction products. Any chemical process involves the presence of contact between the reacting particles. Such contacts arise in liquid or gaseous phases. In solid phases, the direct contact of the reacting particles is possible only at an initial time, after which, as a result of fretting-corrosion, a layer of oxide separates the reagents occurs, and subsequent reaction proceeds through the mass transfer of atoms through the layer of the formed product. The junctions of units of automobile engineering are under the influence of significant changeable loads, which eventually leads to the emergence of microscopes into which the environment is impregnated - water with various impurities. As a result of cyclic loading in the liquid, which is in the micro-gap, there are cavitation processes. As a result of the experimental tests, the change of water parameters, namely: hydrogen index and oxidative reduction potential of water from the duration of treatment by cavitation, and their change in time after treatment with cavitation, were investigated. The main stages of the tribochemical processes of the deformation model, the mechanism of fringing processes are considered, and the method of quantitative description of the course of tribochemical reactions on the surfaces of contacting bodies is proposed, taking into account the chemical activity of gases and radical particles of the aqueous medium. As a result of theoretical and experimental researches, a dynamic model of the fretting process was proposed, taking into account the influence of the external fluid medium, and a promising direction in the fight against fretting-damages in nominally-fixed joints of machine parts, namely the use of soft coatings based on lead, tin , cadmium, which have a low yield strength and are able to change the coefficient of friction on the contact surfaces, and also can absorb a certain part of the energy of vibration.
Опис
Ключові слова
фретинг-корозія, деформаційна модель, динамічна модель, зовнішнє середовище, framing corrosion, deformation model, dynamic model, external environment
Бібліографічний опис
Ганзюк, А.Л. Розвиток основ еволюційної моделі фретиг-корозії з позицій фізичної хімії та хімії твердого тіла із урахуванням факторів зовнішнього впливу [Текст] / А. Л. Ганзюк, В. П. Олександренко // Вісник Хмельницького національного університету. Технічні науки. – 2018. – №2. – С. 20-28.