| Issue |
E3S Web Conf.
Volume 221, 2020
Energy Systems Environmental Impacts (ESEI 2020)
|
|
|---|---|---|
| Article Number | 02001 | |
| Number of page(s) | 5 | |
| Section | Environment Impact on the Properties of Energy Machines Elements | |
| DOI | https://doi.org/10.1051/e3sconf/202022102001 | |
| Published online | 17 December 2020 | |
Environmental effect on corrosion behavior of 9MnSi5 steel pipelines
1
Peter the Great St. Petersburg Polytechnic University, National Technology Initiative Center for Advanced Manufacturing Technologies, 194064 Saint-Petersburg, Russia
2
Central Research Institute of Structural Materials “Prometey”, 191015 Saint-Petersburg, Russia
* Corresponding author: a.alkhimenko@spbstu.ru
The increase in the corrosiveness of the produced fluid forces to reconsider the attitude towards the assessment of the serviceability and reliability of oil pipes, paying attention to the problems of increasing their corrosion resistance. The paper analyses environmental impact on pipeline made of 9MnSi5 steel after 12 months of operation in the oilfield to assess the residual life of pipeline and determine safe operating conditions. It was found that corrosion damage developed according to the mechanisms of general, pitting corrosion and stress corrosion cracking. Metallographic study has shown cracks of stress corrosion cracking that developed in environments containing carbon dioxide and hydrogen sulfide. Accelerated method of stress corrosion cracking resistance testing was implemented that allows to understand the tendency of steel to this type of cracking and gives a conclusion about the danger of brittle fracture of the pipeline.
© The Authors, published by EDP Sciences, 2020
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