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Metallurgist
Published in: Metallurgist 9-10/2018

29-01-2018

Selection of Conversion Layer Applied Beneath Thread Lubricant Coating

Authors: T. N. Churikova, N. P. Samkova

Published in: Metallurgist | Issue 9-10/2018

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Abstract

A polymer coating is often used instead of lubricant in order to protect the threaded part of an oil pipe fitting. There are several forms of these coatings of different composition applied by spraying to the threaded element of a pipe. Metal surface preparation before coating application has a considerable effect on polymer coating quality. Conversion coatings that formed on a pipe threaded surface and couplings as an intermediate layer between a metal surface and a polymer coatings are analyzed. The conversion coatings selected are various phosphate coatings and an alternative phosphate-free zirconium coating. Comparative study of these coatings includes an analysis of application technology, a study of conversion coatings physicochemical properties, and comparative tests for a conversion coating – thread lubricant coating system.
previous article Development of a Production Scheme for Processing Rebellious Gold-Containing Flotation Concentrates by Autoclave Oxidation
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Literature
1.
A. V. Emel’yanov and A. V. Tokarev, “New solution for the problem of sealing threaded joints of borehole columns using ‘clean screwing technology’ – Clear Make Up technology or CMT,” Burenie i Neft, No. 2, 46–47 (2012).
2.
Ya. N. Lipkin and I. M. Shtan’ko, Chemical and Electrochemical Treatment of Steel Pipes, Metallurgiya, Moscow (1982).
3.
I. I. Khin , Theory and Practice of Phoshatizing Metals, Khimiya, Leningrad (1973).
4.
5.
S. L. Zhuravleva, M. N. Bonokina, V. A. Chumaiskii, et al., Patent 2225895 RF, IPC С23С22/18, “Method for applying phosphate composition,” subm. 01.14. 2002, publ. 08.20.2003.
6.
A. I. Grekhov, V. S. Goncharov, Yu. Kress, et al., Patent 2478733 RF, IPC С23С22/05, “Method of phosphating threads and sealing conical borehole couplings and metals preventative components of oil pipes,” subm. 09.16.2011, publ. 04.10.2013, Byull., No. 10.
7.
E. I. Kazannova, M. N. Bonokinna, and V. A. Chumaevskii, Patent 2210624 RF, IPC С23С22/13, “Method for phosphatizing a metal surface,” subm, 06.13.2000, publ. 08.20.2003.
8.
GOSТ 9.302–88, Metal and Non-Metal Inorganic Coatings – Control Methods.
9.
GOSТ 15140, Paint Coatings. Methods for Determining Adhesion.
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A. P. Akol’zin, Anticorrosion Protection of Steel with Film Formers, Metallurgiya, Moscow (1989).
Metadata
Title
Selection of Conversion Layer Applied Beneath Thread Lubricant Coating
Authors
T. N. Churikova
N. P. Samkova
Publication date
29-01-2018
Publisher
Springer US
Published in
Metallurgist / Issue 9-10/2018
Print ISSN: 0026-0894
Electronic ISSN: 1573-8892
DOI
https://doi.org/10.1007/s11015-018-0585-2

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