The purpose of the work—to study the frictional interaction of tribotechnical pairs: alloy AA2024—co-rundum indenter, interacting in an acidic environment under conditions of cathodic and anodic polarization. The influence of external polarization on the tribocorrosive behavior of AA2024 alloy paired with a ceramic ball in acid rain was studied. The rate of destruction of the oxide film on the surface, material losses and friction coefficient depending on the applied external potential is established. The dual influence of cathodic polarization on the tribocorrosion of AA2024 alloy is established. The destruction of metal is inhibited at the potentials below the potentials of the freshly renewed surface. It is due to the reduction of the corrosion rate. Above this potential, corrosion-mechanical wear intensifies due to alkalization of the near-electrode layer of the electrolyte as a result of hydrogen depolarization. Changes in the coefficient of friction are insignificant. It is shown that the anodic polarization intensifies the formation of secondary structures. As a result, there is an increase in losses of materials and the decrease of friction coefficient. It indicates the lubrication properties of products that are intensively removed from the friction zone.
Tribocorrosive Behavior of Aluminum Alloy AA2024 Under Electrochemical Polarization
Lect.Notes Mechanical Engineering
2021-11-02
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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