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Pipe Production
ArticleName Improving the corrosion resistance of threaded joints of oil and gas pipes through the use of coatings obtained by friction cladding
DOI 10.17580/chm.2022.11.04
ArticleAuthor R. R. Dema, N. A. Devyaterikova, M. A. Levantsevich, R. N. Amirov
ArticleAuthorData

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

Abstract

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).

keywords Tubing, threaded connections, deformation cladding, flexible tool, rotating wire brush, corrosion-resistant coating, coating thickness
References

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