A study of synthesis and properties of manganese-containing oxide coatings on alloy VT1-0

Authors

DOI:

https://doi.org/10.15587/1729-4061.2016.69390

Keywords:

the VT1–0 alloy, plasma electrolytic oxidation, oxide coatings, manganese, catalytic activity

Abstract

The study has substantiated the choice of components of manganese–containing electrolytes and their rational concentrations as well as determined the current density range for one–step plasma electrolytic oxidation of the VT1–0 alloy. Oxidation with mixed oxides produced coatings of different compositions and surface morphology. It has been shown that control over the chemical and phase compositions of coatings, the surface topography, and the grain size as well as incorporation of manganese oxides into a coating can be achieved by varying the concentration of the electrolyte and the oxidation parameters.

Adding manganese sulfate to a pyrophosphate electrolyte has proved to be valuable for enhancing the content of the alloying component in the oxide layer and for reducing the concentrations of potassium and impurities. An increase in the current density of plasma electrolytic oxidation has been found to promote the formation of the oxide layer with a more developed surface area that is characterized by alternating torus–like inclusions and nanoporous sections. By studying the distribution of the content elements throughout the thickness of the oxide coating, it has been determined that manganese is uniformly distributed in the surface layer, but phosphorus is mainly located at the oxide–solution interface.

It has been found that the synthesized mixed oxide coatings of manganese and titanium are highly resistant to abrasion. Incorporation of manganese has proved to reduce the grain size and improve the surface development, which facilitates catalytic activities in the oxidation reactions of carbon monoxide. The resulting materials can be used in process systems of catalytic purification.

Author Biographies

Nikolay Sakhnenko, National Technical University «Kharkiv Polytechnic Institute» 21 Bagalіya str., Kharkiv, Ukraine, 61002

Doctor of technical sciences, Professor, Head of the Department

Department of Physical Chemistry

Maryna Ved, National Technical University «Kharkiv Polytechnic Institute» 21 Bagalіya str., Kharkiv, Ukraine, 61002

Doctor of technical sciences, Professor

Department of General and Inorganic Chemistry

Ann Karakurkchi, National Technical University «Kharkiv Polytechnic Institute» 21 Bagalіya str., Kharkiv, Ukraine, 61002

PhD

Head of the Research Laboratory of Military Training Faculty

Alexander Galak, National Technical University «Kharkiv Polytechnic Institute» 21 Bagalіya str., Kharkiv, Ukraine, 61002

PhD

Deputy Head of Military Training Faculty for Education and Research – Head of Studies

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Published

2016-06-15

How to Cite

Sakhnenko, N., Ved, M., Karakurkchi, A., & Galak, A. (2016). A study of synthesis and properties of manganese-containing oxide coatings on alloy VT1-0. Eastern-European Journal of Enterprise Technologies, 3(5(81), 37–43. https://doi.org/10.15587/1729-4061.2016.69390

Issue

Vol. 3 No. 5(81) (2016): Applied physics. Materials Science

Section

Materials Science

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Copyright (c) 2016 Nikolay Sakhnenko, Ved Maryna, Ann Karakurkchi, Alexander Galak

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