E3S Web of Conf.
Volume 225, 2021II International Conference “Corrosion in the Oil & Gas Industry” 2020
|Number of page(s)||6|
|Section||Corrosion Mechanisms and Testing Methods|
|Published online||05 January 2021|
Corrosionfracture kinetics in welded pipes in chlorine-saturated carbon dioxide oilfield media
1 Togliatti State University, 445000, Togliatti, Russian Federation
2 IT-Service LLC, 443001, Samara, Russian Federation
* Corresponding author: email@example.com
Bypass tests of Ø219×8mm 13KhFA, 08KhMFChA, 20-ksh (steel 20 corrosion resistant cold resistant) and Grade steel 20 piping spools were carried out on an oil-gathering line of one of the oilfields in the Stavropol region. Tubing condition was checked after 7, 15, 17 and 23 months of testing. After two years in service no change was found in mechanical properties of the base metal or weldments manufactured from 13KhFA and 08KhMFChA steels. It has been demonstrated that the formation of chromium-containing phase in corrosion products inhibits the penetration of chlorine ions from corrosive media to the surface of metal and thus reduces corrosion rates. Estimated, laboratory and comparison passivation coefficients have been proposed. These coefficients make it possible to predict the level of steel self-passivation with regard to operating conditions of particular oilfields.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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