Tribological properties of anode-spark coatings on aluminum alloys

Authors

  • O. Dykha Khmelnitskyi National University, Ukraine
  • O. Babak Khmelnitskyi National University, Ukraine
  • O. Makovkin Khmelnitskyi National University, Ukraine
  • S. Posonskiy Khmelnitskyi National University, Ukraine

DOI:

https://doi.org/10.31891/2079-1372-2022-104-2-28-34

Keywords:

anode-spark coatings, aluminum alloys, tribological tests, wear, friction coefficient

Abstract

It is established that at present the technology of anode-spark coatings in general is well studied. However, the lack of recommendations for the choice of modes of technological processes and tribological characteristics in different operating conditions limit the widespread introduction of this technology. The task of this work was to analyze the processes of anode-spark coatings, improve technology and study the wear resistance of samples processed by this and traditional anode technology. The development of technology for the application of protective coatings on valve metals in the conditions of spark discharge included the choice of electrolyte and mode of operation of the bath: voltage, current density, hydrodynamic conditions and other parameters. Wear resistance tests were performed on a special installation. Structurally, the installation is made in two positions, which allows you to test two samples with different load conditions at a constant sliding speed. The design of the installation implements the friction scheme of the liner shaft. The study of anode-spark coatings in the mode of limiting lubrication was studied in the environment of industrial oil. The wear criterion was the weight wear of the samples according to the results of weight measurements before and after wear. It is established that prolonged electrolysis in the conditions of sparking leads to the formation of anode coatings that exceed in their properties the films obtained by non-sparking oxidation. Comparative studies of the wear resistance of anode-spark coatings and galvanic anode coatings under the same test conditions showed that the wear of anode-spark coatings is almost twice lower for the entire load range. The considered technology is recommended for increase of wear resistance of elements of devices from the aluminum alloys working in the conditions of corrosion and mechanical wear

References

1. Subba Rao, A.N., Venkatarangaiah, V.T. Metal oxide-coated anodes in wastewater treatment. Environ Sci Pollut Res 21, 3197–3217 (2014). https://doi.org/10.1007/s11356-013-2313-6
2. C.B. Wei, X.B. Tian, S.Q. Yang, X.B. Wang, Ricky K.Y. Fu, Paul K. Chu, Anode current effects in plasma electrolytic oxidation, Surface and Coatings Technology, Volume 201, Issues 9–11, 2007, Pages 5021-5024.
3. Bin Li, Jing Xue, Chao Han, Na Liu, Kaixuan Ma, Ruochen Zhang, Xianwen Wu, Lei Dai, Ling Wang, Zhangxing He, A hafnium oxide-coated dendrite-free zinc anode for rechargeable aqueous zinc-ion batteries, Journal of Colloid and Interface Science, Volume 599, 2021, Pages 467-475
4. L.K Xu, J.D Scantlebury, A study on the deactivation of an IrO2–Ta2O5 coated titanium anode, Corrosion Science, Volume 45, Issue 12, 2003, Pages 2729-2740.
5. Sevidova, E.K., Kononenko, V.I. Assessment of bioengineering ceramic coatings using the wetting method. J. Superhard Mater. 29, 82–85 (2007). https://doi.org/10.3103/S1063457607020037
6. Pogrebnjak, A.D., Tyurin, Y.N. The structure and properties of Al2O3 and Al coatings deposited by microarc oxidation on graphite substrates. Tech. Phys. 49, 1064–1067 (2004). https://doi.org/10.1134/1.1787669
7. Umanskyi, O., Storozhenko, M., Tarelnyk, V. et al. Electrospark Deposition of Fenicrbsic–Meb2 Coatings on Steel. Powder Metall Met Ceram 59, 57–67 (2020). https://doi.org/10.1007/s11106-020-00138-5
8. Markov, M.A., Bykova, A.D., Krasikov, A.V. et al. Formation of Wear- and Corrosion-Resistant Coatings by the Microarc Oxidation of Aluminum. Refract Ind Ceram 59, 207–214 (2018). https://doi.org/10.1007/s11148-018-0207-3
9. Gutsalenko, Y.G., Sevidova, E.K. & Stepanova, I.I. Evaluation of Technological Capability to from Dielectric Coatings on AK6 Alloy, Using a Method of Microarc Oxidation. Surf. Engin. Appl.Electrochem. 55, 602–606 (2019). https://doi.org/10.3103/S1068375519050041

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Published

2022-06-24

How to Cite

Dykha, O., Babak, O., Makovkin, O., & Posonskiy, S. (2022). Tribological properties of anode-spark coatings on aluminum alloys. Problems of Tribology, 27(2/104), 28–34. https://doi.org/10.31891/2079-1372-2022-104-2-28-34

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