Obrabotka Metallov 2020 Vol. 22 No. 3

OBRABOTKAMETALLOV Vol. 22 No. 3 2020 103 MATERIAL SCIENCE The In fl uence of Salt fog Exposure on Corrosion Resistance of Detonation Coatings Fe 66 Cr 10 Nb 5 B 19 Ivanna Kuchumova 1, 2, a, * , Igor Batraev 1, b , Nina Cherkasova 2, c , Arina Ukhina 3, d , Alexander Shtertser 1, e , Alberto Moreira Jorge 4, 5, f 1 Lavrentyev Institute of Hydrodynamics of the Siberian Branch of the Russian Academy of Sciences, 15 Akademika Lavrenteva Prospekt, Novosibirsk, 630090, Russian Federation 2 Novosibirsk State Technical University, 20 K. Marksa Prospekt, Novosibirsk, 630073, Russian Federation 3 Institute of Solid State Chemistry and Mechanochemistry SB RAS, 18 Kutateladze Street, Novosibirsk, 630128, Russian Federation 4 Department of Materials Science and Engineering, Federal University of Saö Carlos, Via Washington Luiz, km 235, Saö Carlos, SP 13565-905, Brazil 5 Grenoble Alpes University, CNRS, LEPMI and SIMAP, F-38000 Grenoble, France a https://orcid.org/0000-0003-0459-9180, ivannakz@mail.ru, b https://orcid.org/0000-0002-0364-144X , ibatraev@gmail.com , c https://orcid.org/0000-0002-5603-7852, cherkasova.2013@corp.nstu.ru , d https://orcid.org/0000-0003-1878-0538, auhina181@gmail.com , e https://orcid.org/0000-0003-4973-0437, asterzer@mail.ru, f https://orcid.org/0000-0002-8121-9834, moreira@ufscar.br Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2020 vol. 22 no. 3 pp. 95–105 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2020-22.3-95-105 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 22 June 2020 Revised: 14 July 2020 Accepted: 10 August 2020 Available online: 15 September 2020 Keywords : Detonation spraying Amorphous structure Coating Corrosion resistance Salt fog Funding The reported research was funded by the Russian Foundation for Basic Research and the government the Novosibirsk region, project 19-43- 543034 r_mol_a. Acknowledgements The authors are grateful to Konstantin B. Gerasimov for his help in conduct- ing DSC investigation. ABSTRACT Introduction . Nowadays, the development of alloys with a high glass-forming ability and the study of its physical and mechanical properties are among the most important directions in materials science. Iron-based multi- component alloys with high glass-forming ability have high corrosion resistance, wear resistance and relatively low cost, which makes it promising for application on the working surfaces of parts that work under conditions of abrasive wear and aggressive environment. Methods of thermal spraying (plasma spraying, detonation spraying, high-velocity oxy-fuel spraying, etc.) allow producing coatings with amorphous structure from iron-based alloys. Due to the process features, detonation spraying allows to obtain high quality coatings with the structure of metal glass in comparison with other methods of thermal spraying. The purpose of the work is to study the in fl uence of phase composition of detonation coatings from a multi-component iron-based alloy on the resistance to atmospheric corrosion in conditions of neutral salt spray. Detonation coatings from amorphous alloy Fe 66 Cr 10 Nb 5 B 19 obtained at different charges of explosive mixture are investigated. The methods of investigation : testing of detonation coat- ings under simulated conditions of atmospheric corrosion in salt spray chamber according to ASTM B117 in an atmosphere of a spray 5% sodium chloride solution in water for 600 hours at room temperature, as well as conducting X-ray phase and metallographic studies of coatings before and after tests. Results and Discussion . The results of in- vestigation the phase composition and morphology of the coatings after the tests showed its high corrosion resistance in a neutral salt fog containing a large amount of chlorine anions. On the cross sections of those coatings no traces of corrosion penetration were found, which con fi rms the effectiveness of detonation coatings with the structure of metal glass from the alloy Fe 66 Cr 10 Nb 5 B 19 for protection of parts that work under conditions of high atmospheric humidity, without sealing the surface. For citation: Kuchumova I.D., Batraev I.S., Cherkasova N.Y., Ukhina A.V., Shtertser A.A., Jorge A.M. The in fl uence of salt fog exposure on corrosion resistance of detonation coatings Fe 66 Cr 10 Nb 5 B 19 . Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2020, vol. 22, no. 3, pp. 95–105. DOI: 10.17212/1994-6309-2020-22.3-95-105. (In Russian). ______ * Corresponding author Kuchumova Ivanna D. , Research Assistant Lavrentyev Institute of Hydrodynamics of the Siberian Branch of the RAS 15 Ac. Lavrentieva ave., 630090, Novosibirsk, Russian Federation Tel.: +7-923-707-56-51, e-mail: ivannakz@mail.ru