Formation of oxide fuels on vt6 alloy in the conditions of anodial polarization in solutions H2SO4

Authors

DOI:

https://doi.org/10.15587/1729-4061.2018.132521

Keywords:

oxide films, titanium dioxide, implant, electrochemical oxidation, forming dependence

Abstract

We report results of research into a process of electrochemical oxidation of the titanium alloy VT6 in solutions of H2SO4. It is shown that the character of forming dependences for alloy samples depends on the magnitude of current density. At j<0.5 А·dm–2, a continuous oxide film does not form at the surface of the alloy; the assigned value for voltage is not reached. At j>0.5 А·dm–2, a continuous oxide film forms at the surface of the alloy; a linear character of dependences is observed. The films obtained under these conditions relate to the interferential-colored films. A film thickness limit is defined by the assigned magnitude of U and does not depend on other parameters of the electrolysis. For the series of identical values for U, dependence of τ‒j has a linear shape. The color of the oxide film is determined by the value of voltage and does not depend on the current density and electrolyte concentration. We established a correspondence between a color of the film and the magnitude of U in the range of 10‒100 V. This effect is due to the fact that the formation of a film at anodic polarization occurs in the presence of a gradient in the potential whose quantity for titanium is a constant magnitude. Increasing the assigned magnitude of U leads to a proportional increase in the maximum thickness of the oxide, which determines its color. Results of our study on determining the effect of electrolysis parameters on the characteristics of oxide films made it possible to substantiate the mode for obtaining TiO2 films at the surface of the alloy VT6. The data obtained form the basis for the development of technology for electrochemical oxidation of titanium implants in order to render functional properties to their surface.

Author Biographies

Alexei Pilipenko, National Technical University «Kharkiv Polytechnic Institute» Kyrpychova str., 2, Kharkiv, Ukraine, 61002

PhD, Senior Lecturer

Department of technical electrochemistry

Hanna Pancheva, National Technical University «Kharkiv Polytechnic Institute» Kyrpychova str., 2, Kharkiv, Ukraine, 61002

PhD, Senior Lecturer

Department of labor and environment protection

Viktoriya Deineka, National University of Civil Defencen of Ukraine Chernyshevska str., 94, Kharkiv, Ukraine, 61023

PhD, Assosiate Professor

Department of special chemistry and chemical technology

Roman Vorozhbiyan, National Technical University «Kharkiv Polytechnic Institute» Kyrpychova str., 2, Kharkiv, Ukraine, 61002

PhD, Senior Lecturer

Department of  automation of technological systems and environmental monitoring

Marina Chyrkina, National University of Civil Defencen of Ukraine Chernyshevska str., 94, Kharkiv, Ukraine, 61023

PhD, Assosiate Professor

Department of special chemistry and chemical technology

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Published

2018-05-29

How to Cite

Pilipenko, A., Pancheva, H., Deineka, V., Vorozhbiyan, R., & Chyrkina, M. (2018). Formation of oxide fuels on vt6 alloy in the conditions of anodial polarization in solutions H2SO4. Eastern-European Journal of Enterprise Technologies, 3(6 (93), 33–38. https://doi.org/10.15587/1729-4061.2018.132521

Issue

Vol. 3 No. 6 (93) (2018): Technology organic and inorganic substances

Section

Technology organic and inorganic substances

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Copyright (c) 2018 Alexei Pilipenko, Hanna Pancheva, Viktoriya Deineka, Roman Vorozhbiyan, Marina Chyrkina

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