Results of corrosion tests of steel pipe grades in a carbon dioxide environment in the presence of hydrogen sulfide and oxygen
UDC: 620.193.01
DOI: -
Authors:
SOSNIN EVGENIY A.
1,
CHERNYSHEV VALENTIN E.1,
DANILENKO DMITRY G.1,
ANDREEV SERGEY A.1,
KARPOV YURIY V.1
1 LUKOIL-Engineering, Perm, Russia
Keywords: pipeline, steel, localized corrosion, bench installation, marine conditions, inhibitor protection, carbon dioxide environment
Annotation:
The authors of the article describe the testing of steel grades in the model of a mixture of reservoir and seawater on a laboratory Flow loop. The tests were carried out in order to select the pipeline material suitable for marine conditions. The following grades were used for testing: Steel 20, 20YuCh, 09G2S, Low-alloy steel with a chromium content of less than 1 %, 08H18H10T. After exposing the samples, metallographic studies were carried out and the intensity of general and local corrosion was determined. It has been established that against the background of high general corrosion, the beginnings of ulcerative corrosion (except 08X18H10T) are formed, which in future can lead to significant destruction of steel pipes material. According to the test results, it was revealed that the studied steel samples do not have the required corrosion resistance under specified conditions. And without the organization of effective inhibitory protection, effective bactericidal treatments and bringing the quality of the transported medium to the necessary requirements, or the use of an anti-corrosion liner, they cannot be recommended for the construction of a pipeline in such a corrosive environment as a mixture of reservoir and seawater.
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