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ArticleName The properties of microarc oxidation coatings installed on AlSi10Mg specimens produced by selective laser melting
DOI 10.17580/tsm.2021.10.10
ArticleAuthor Lesnevskiy L. N., Lyakhovetskiy M. A., Maltsev I. E., Kozhevnikov G. D.

Moscow Aviation Institute (National Research University), Moscow, Russia:

L. N. Lesnevskiy, Professor, Doctor of Technical Sciences, e-mail:

M. A. Lyakhovetskiy, Associate Professor, Candidate of Technical Sciences

G. D. Kozhevnikov, Undergraduate Student


Experimental Machinebuilding Plant of S.P. Korolev Rocket and Space Corporation Energia, Roskosmos, Korolev, Moscow Region, Russia:
I. E. Maltsev, Managing Director


This paper examines the properties of coatings produced by microarc oxidation (MAO) on AlSi10Mg alloy specimens, which were obtained by selective laser melting. Two different electrolytes were used to install the coatings: silicate and silicate-phosphate. Modes were used that are recommended for the microarc oxidation of high-silicon aluminium casting alloys. As a result, double-layer coatings of different thicknesses were produced in relatively close timeframes of the MAO process. The thickness, roughness and wear spots were analyzed with the help of a laser interference microscope; the hardness was measured on a microhardness tester; the morphology and the elemental composition of the MAO coatings were analyzed by means of scanning electron microscopy (SEM); an X-ray diffractometer was used for phase analysis. The measurements showed that the coatings produced in the silicate-phosphate electrolyte have higher microhardness, corrosion resistance and specific electrical strength. Based on the results of friction tests and having analyzed the Ffr – Dr hysteresis loops obtained for reciprocating wear of the specimens, with the friction force Ffr and the travel D being simultaneously measured, the authors established that the wear resistance of the coatings produced in silicate-phosphate electrolyte is ~1.4 times higher than in the case of silicate electrolyte. The conducted study confirmed the efficiency of using silicate-phosphate electrolyte for producing high-quality protective coatings, which applies to almost all parameters. The paper shows that MAO coatings installed on AlSi10Mg alloy specimens produced by selective laser melting offer high performance. Thus, they can be recommended for pilot production of spacecraft components.
This research was carried out as part of an assignment of the Ministry of Education and Science of Russia, Subject No.: FSFF-2020-0014.

keywords Microarc oxidation, selective laser melting, aluminium alloy Al-Si10Mg, microhardness, corrosion resistance, electrical strength, friction coefficient, wear resistance, volumetric wear coefficient

1. Antipov V. V. Potential development of aluminium, magnesium and titanium alloys for aerospace applications. Aviatsionnye materialy i tekhnologii. 2017. No. 5. pp. 186–194.
2. Surface engineering of light alloys. Aluminum, magnesium and titanium alloys. Ed. Hanshan Dong. Boca Raton Boston New York Washington DC : CRC Press, 2010. 662 p.
3. Morozov I. A. Lecture notes on the course in Production of Spacecraft Propulsion Systems. Part 1. Basic theory. Moscow : Izdatelstvo MAI, 1973. 127 p.
4. Tarasova T. V. Additive manufacturing. Learner’s guide. Moscow : INFRA-M, 2019. 196 p.
5. Galinovskiy A. L., Golubev E. S., Kobernik N. V., Filimonov A. S. Additive manufacturing for aerospace components: A guide for university students. Moscow : Izdatelstvo Yurayt, 2020. 115 p.
6. Pezzato L., Dabala M., Brunelli K. Microstructure and corrosion properties of PEO coatings produced on AM-aluminum alloys. Key Engineering Materials. 2019. Vol. 813. pp. 298–303.
7. Pezzato L., Dabala M., Cross S., Brunelli K. Effect of microstructure and porosity of AlSi10Mg alloy produced by selective laser melting on the corrosion properties of plasma electrolytic oxidation coating. Surface Coatings and Technology. 2020. Vol. 404, Iss. 7. 27 p.
8. Shrestha S., Dunn B. D. Advanced plasma electrolytic oxidation treatment for protection of lightweight materials and structures in a space environment. Surface World. Advance Surface Treatment. 2007. November. pp. 40–44.
9. Alyakretskiy R. V., Broks A. A., Orlova D. V. Understanding the effect of MAO modes on the corrosion properties of coatings protecting spacecrafts. Proceedings of the 8th Nationwide Conference Important Problems Faced by Aerospace Industry. Engineering Sciences. Reshetnev Siberian State University for Science and Technology. 2012. p. 36.
10. Karimova S. A., Pavlovskaya T. T. Developing corrosion protection techniques for structures utilized in space. Trudy VIAM. Elektronnyy zhurnal. 2013. No. 4. Available at:
11. Mikheev A. E., Girn A. V., Ivasev S. S., Evkin I. V. Understanding the properties of the coatings obtained for spacecrafts. Vestnik SibGAU. 2013. No. 3. pp. 217–224.
12. Pavlovskaya T. G., Doshevaya E. A., Zaytsev S. N., Kozlov I. A. et al. Corrosion resistance of aluminium alloys in conditions simulating a space flight. Trudy VIAM. Elektronnyy zhurnal. 2016. No. 3. Available at:
13. Shapiro A. A, Borgonia J. P., Chen Q. N. et al. Additive Manufacturing for aerospace flight applications. Journal of Spacecraft and Rockets. 2016. Vol. 53, No. 5. pp. 952–909.
14. Barroqueiro B., Andrade-Campos A., Valente R. F., Neto V. A. Metal additive manufacturing cycle in aerospace industry. A comprehensive review. Journal of Manufacturing and Materials Processing. 2019. Vol. 3, Iss. 52. 21 p.
15. Maltsev I. E., Basov A. A., Borisov M. A., Bystrov A. V. Understanding the properties of a piece of a spacecraft hydraulic circuit produced by additive manufacturing. SPRAVOCHNIK. Inzhenernyi zhurnal. 2020. No. 4. pp. 11–19.
16. Lesnevskiy L. N., Troshin A. E., Tyurin V. N., Tveritin A. L. et al. Microarc oxidation of parts that operate under boundary lubrication and dry friction conditions. Proceedings of the International Conference Hydrodynamic Theory of Lubrication – 120 years, Orel, OGTU, 2006. Vol. 2. pp. 162–171.
17. Krishtal M. M., Ivashin P. V., Polunin A. V., Borgardt E. D. et al. Raising the performance of microarc oxidation of aluminium-silicon alloys. Science Vector of Togliatti State University. 2015. No. 2 (32-2). pp. 86–93.
18. GOST 9.302–88. Metal and non-metal inorganic coatings. Control methods. Introduced: 01.01.1990.
19. GOST 9450–76. Measuring microhardness by diamond instruments indentation. Introduced: 01.01.1977.
20. GOST 6433.3–71. Methods for evaluation of electrical strength at AC (50 Hz) and DC voltage. Introduced: 01.07.1972.
21. GOST 9.302–88. Unified system of corrosion and ageing protection. Metal and non-metal inorganic coatings. Control methods. Introduced: 01.01.1990.
22. Nikolaev I. A., Lyakhovetskiy M. A., Torskaya E. V., Kornev Yu. V. Factors causing failure of ceramic composite coatings under vibration contact loads. Aviation and Space Industry – 2017. Abstracts. Moscow Aviation Institute (National Research University). 2017. pp. 113–114.
23. Lesnevskiy L. N., Lyakhovetskiy M. A., Savushkina S. V. Fretting wear of composite ceramic coatings produced by microarc oxidation on D16 aluminium alloy. Trenie i iznos. 2016. Vol. 37, No. 3. pp. 345–351.

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