English

Vol. 7 6, 2017 p 66-71

Pages

Article name, authors, abstract and keyword

66-71

Protection of pipeline welded seams by gas-dynamic spraying

Vladimir E. Arkhipov a, Anatoly F. Londarsky a, Gennady V. Moskvitin a, Maxim S. Pugachev a, Natalia V. Shirokova a

a Mechanical Engineering Research Institute of the Russian Academy of Sciences (IMASH RAN), 4, Maly Kharitonyevsky Pereulok, Moscow, 101990, Russian Federation

DOI: 10.28999/2541-9595-2017-7-6-66-71

Abstract: The paper discloses the results of a study of properties of aluminum and zinc coatings applied by gas-dynamic spraying on surface of iron-carbon alloys. Adhesion strength of aluminum and zinc coatings with 40H steel substrate is at least 30 MPa and 35 MPa, respectively, which should ensure the high serviceability of the surface in case the treated area is exposed to normal and tangential stresses. Cohesive strength of the coating metal - i. e. aluminum and zinc - is up to 150 MPa and 80 MPa, respectively, which enables reliable coating operation in case the structure is deformed. Gas-dynamic spraying of aluminum and zinc coatings onto 20 low-carbon steel allows 12-fold and 45-fold (respectively) reduction in the corrosion rate in a weak electrolyte environment. Improvement of the mechanical properties of the base metal and the welded seam is shown as a result of the coating spraying process.

Keywords: gas-dynamic sprayting, covering hardness, cohesion, coupling durability, corrosion.

Reference for citing:
Arkhipov V. E., Londarsky A. F., Moskvitin G. V., Pugachev M. S., Shirokova N. V. Protection of pipeline welded seams by gas-dynamic spraying. Naukatekhnol. truboprov. transp. neftiinefteprod. = Science & Technologies: Oil and Oil Products Pipeline Transportation. 2017;7(6):6671.

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