Nosov Magnitogorsk Technical University, Magnitogorsk, Russia¹ ; Novotroitsk branch of NUST MISIS, Novotroitsk, Russia²:

R. R. Dema, Dr. Eng., Associate Prof. of the Dept. of Machinery and Technologies for Metal Forming and Mechanical Engineering¹, Prof. of the Dept. of Metallurgical Technologies and Equipment², e-mail: demarr78@mail.ru

R. N. Amirov, Cand. Eng., Associate Prof. of the Dept. of Machinery and Technologies for Metal Forming and Mechanical Engineering¹, Associate Prof. of the Dept. of Metallurgical Technologies and Equipment²

JSC Pervouralsky Novotrubny Plant, Pervouralsk, Russia:
N. A. Devyaterikova, Leading Research Engineer

Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Belarus:
M. A. Levantsevich, Cand. Eng., Associate Prof., Leading Researcher

The development and implementation of technologies for the protection of threaded joints of oil and gas pipes, providing a guaranteed cycle of make-up-breakout and increase corrosion resistance, is an urgent task. In the paper, studies were carried out to study the corrosion resistance ofcoatings formed by the cladding method with a flexible tool. Multilayer coatings from metals and alloys of copper, zinc, aluminum, magnesium, chromium and nickel were studied. Studies of the corrosion resistance of the coatings were carried out in a KST-2 salt fog chamber according to GOST 9.308–85. The total duration of the tests was 192 hours. The concentration of the water-salt NaCl solution was 5% in accordance with GOST 9.905–2007. As a result of the tests, it was found that uncoated samples have the least corrosion resistance (the first centers of corrosion appeared on their surfaces after 8 hours). Also, single-layer coatings of brass (L63), copper (M1), bronze (BrOTsS5-5-5) did not pass the test. The total corrosion area was more than 70 % with a test duration of 48 hours. Corrosion resistance of samples with coatings of Al, Mg, composition of Al (50 %) and Ni (50 %) was 176 hours of testing. The following multilayer coatings passed the test: composition of Al (50 %) – Zn (50 %), Cr + Al, Cr + Al + polymer, Cr + composition of Al (50 %) – Ni (50 %), Cr + composition of Al (50 %) – Zn (50 %) + Cu. It has been determined that to protect the surface of threaded joints of tubing from corrosion, it is preferable to use multilayer coatings of Cr + alloy of Al (50 %) – Zn (50 %) + Cu. This coating, in addition to providing corrosion protection, can improve the antifriction properties of coatings due to an additional layer of copper.
This work was supported by the Ministry of Science and Higher Education of Russian Federation (project № FZRU-2020-0011) and the Belarusian Republican Foundation for Basic Research (grant T21ET-005).

1. Kushnarenko V. М., Repyakh V. S., Tavtilov I. Sh., Reshetov S. Yu. Causes of damage to tubing couplings. Izvestiya vuzov. Povolzhskiy region.  . 2020. No. 4 (56). pp. 122–134.
2. Belevskiy L. S., Efimova Yu. Yu., Dema R. R., Platov S. I., Grigorovich К. V., Vityaz P. А., Basinyuk V. L., Levantsevich М. А., Devyaterikova N. А. Tests of threaded coatings of tubing couplings on a coupling winding machine. Tyazheloe mashinostroenie. 2021. No. 7-8. pp. 39–44.
3. Proskurkin Е. V. Protective coatings – quality and durability of pipes. Natsionalnaya metallurgiya. 2003. No. 5. pp. 86–96. 4. Knyazkin S. А., Ioffe А. V., Vyboyshchik М. А., Zyryanov А. О. Features of corrosion destruction
of tubing during operation in environments with high carbon dioxide content. Metallovedenie i termicheskaya obrabotka metallov. 2012. No. 10. pp. 10–14.
5. Lv Hai-zhou, Sun Ming, Xu Yu-bin, Wu Yun, Sun Long-long. Station pipes inspection method and application based on damage modes. IOP Conference Series: Earth and Environmental Science. 2021. Vol. 760. p. 012043.
6. Cuvalci O., Sofuoglu H., Ertas A. Effect of surface coating and tin plating on friction characteristics of P-110 tubing for different thread compounds. Tribology International. 2003. Vol. 36, Iss. 10. pp. 757–764.
7. Du C. Influence of coupling copperizing on anti-galling performance of tubing threads. Bao-Steel Technol. 2001. Vol. 11, Iss. 3. pp. 28–30.
8. Zhang D. Performance study on the anti-galling of tubing thread. China Petroleum Machinery. 2005. Vol. 33 (5). pp. 23–25.
9. Chizhov I. А., Merkushin Е. А., Pachkolina P. А., Berezovskaya V. V. Influence of galvanizing technology of tubing couplings in the oil industry on the structure and properties of coatings. Nauka i obrazovanie: elektronnoe nauchnoe izdanie. 2016. No. 12. pp. 343–366.
10. Meng Zhao., Li Yi, Yang Yun, Xu Zhi-Qian, Shi Bin, Zhao Shi-Long. Effect of a nanoparticulate anti-friction coating on galling resistance of threaded oil-casing couplings. Journal of Petroleum Science and Engineering. 2015. Vol. 128. pp. 140–144.
11. Belevskii L. S., Tulupov S. A., Smirnov O. M., Gordon J., Belevskii I. L. Friction plating of metal on metal. Part II. Mechanism of friction plating. Metallurgist. 2006. Vol. 50. No. 11-12. pp. 555–558.
12. Levantsevich M. A., Maksimchenko N. N., Kalach V. N. Influence of coatings on the antiskip properties of slipping guides. Russian Engineering Research. 2013. Vol. 33. No. 4. pp. 213–216.
13. Belevskiy L. S., Belevskaya I. V., Efimova Yu. Yu., Koptseva N. V. Impact-friction combined machining with a flexible tool. Vestnik Magnitogorskogo gosudarstvennogo tekhnicheskogo universiteta imeni G. I. Nosova. 2014. No. 4 (48). pp. 53–57.
14. Belevskiy L. S., Efimova Yu. Yu., Grigorovich К. V., Dema R. R., Platov S. I., Vityaz P. А., Basinyuk V. L., Levantsevich М. А., Gizatullin А. B. Metallographic studies of thread coatings of tubing couplings after testing on a coupling winding machine. Problemy chernoy metallurgii i materialovedeniya. 2021. No. 3. pp. 42–48.
15. Kehr J. A., Enos D. G. FBE, a Foundation for Pipeline Corrosion Coatings. NACE corrosion. 2000. Iss. NACE-00757.
16. Keresten A., Ostanin S., Zuev V. Advanced liquid epoxy and polyurethane materials: internal and external coatings for pipeline and tubing protection. E3S Web of Conferences. 2021. Vol. 225. p. 05004.
17. Pinchuk S., Galchenko G., Simonov A., Masakovskaya L., Roslyk I. Complex corrosion protеction of tubing in gas wells. Chemistry & Chemical Technology. 2018. Vol. 12. No. 2. pp. 529–532.
18. Proskurkin Е. V., Petrov I. V., Zhuravlev А. Yu., Polikarpov М. P. Innovative developments in the production of pipes of high corrosion resistance and operational reliability. Proizvodstvo prokata. 2016. No. 2. pp. 22–26.
19. Biryukov A., Zakharyevich D., Galin R., Devyaterikova N., Scherbakov I. Corrosion resistance of thermal diffusion zinc coatings of ”PNTZ“ in oilfield environments. E3S Web of Conferences. 2019. Vol. 121. p. 02005.
20. GOST 9.308–85. Unified system of corrosion and ageing protection. Metal and non-metal inorganic coatings. Methods for accelerated corrosion tests. Introduced: 01.01.1987.
21. GOST 9.905–2007. Unified system of corrosion and ageing protection. Corrosion test methods. General requirements. Introduced: 01.07.2009.
22. GOST 9.316.–2006. Unified system of corrosion and ageing protection. Thermodiffusion zinc coatings. General requirements and control methods. Introduced: 01.07.2007.
23. Vorobyeva G. Ya. Corrosion resistance of materials in aggressive media of chemical production. Moscow: Khimiya. 1975. 816 p.