Research of precipitations in assessing the causes of corrosion at gas facilities

Various methods of corrosion monitoring are used to control the aggressiveness of the operating conditions of oil and gas facilities and ensure their safe and reliable operation. One of them is the analysis of the resulting corrosion products and other sediments and deposits to obtain data on their composition. We present the results of studying sediments when determining the mechanisms and causes of corrosion processes followed by the development of measures aimed at the elimination of the factors promoting the corrosion development. The composition of sediments formed at the facilities of a gas complex was studied. Inorganic compounds and elemental composition were analyzed by X-ray diffraction and scanning electron microscopy. It is revealed that elemental sulfur is present in the composition of sediments, indicating the presence of dangerous sulfur-containing compounds in the system (for example, H₂S). Using IR spectroscopy and chromate-mass spectrometry, the organic components of sediments formed during preparation of the methanol solution of a corrosion inhibitor were determined. It is shown that the reason for their formation is the presence of oil hydrocarbons in the solution. When analyzing the sediments formed inside the water transport pipe, it was shown that they include iron oxides and hydroxyoxides. At the same time, in places of a through defect on the outer surface of the pipe, corrosion products consisting of Fe(II) or Fe(III) hydroxides with layers of anions and water molecules, the so-called «green rust», are formed. Unstable under operating conditions, such a sediment is unable to protect the steel surface from corrosion. The results obtained can be used in conducting corrosion monitoring at gas facilities to identify corrosion factors affecting the formation of sediments and deposits.

1. Vagapov R. K. Corrosion Destruction of Steel Equipment and Pipelines at Gas Field Facilities in the Presence of Aggressive Components / Steel in Translation. 2023. Vol. 53. N 1. P. 5 – 10. DOI: 10.3103/S096709122301013

2. Rajendran V., Prathuru A., Fernandez C., Faisal N. Corrosion monitoring at the interface using sensors and advanced sensing materials: methods, challenges and opportunities / Corrosion Engineering, Science and Technology. 2023. Vol. 58. N 3. P. 281 – 321. DOI: 10.1080/1478422X.2023.2180195

3. Vagapov R. K., Ibatullin K. A., Yarkovoi V. V. Comparison of corrosion monitoring instrument methods for hydrocarbon processing object conditions / Chemical and Petroleum Engineering. 2022. Vol. 58. N 3 – 4. P. 338 – 333. DOI: 10.1007/s10556-022-01095-z

4. Artemenkov V. Yu., Koryakin A. Yu., Dikamov D. V., et al. Arrangement of corrosion monitoring at facilities of the second site of Achim deposits at Urengoy oil-gas-condensate field / Gas Industry of Russia. 2017. Vol. 754. P. 74 – 79 [in Russian].

5. Kantyukov R. R., Zapevalov D. N., Vagapov R. K., Ibatullin K. A. Comparative analysis of the key methods of corrosion monitoring at hydrocarbon production facilities / Science & technology in the gas industry. 2022. Vol. 91. N 3. P. 45 – 55 [in Russian].

6. Kobychev V. F., Ignatov I. V., Shustov I. N., et al. Improvement of the corrosion monitoring system of the hydrocarbons production facilities of the Achimov sediments / Oilfield engineering. 2022. Vol. 639. N 3. P. 54 – 61 [in Russian]. DOI: 10.33285/0207-2351-2022-3(639)-54-61

7. Slugin P. P., Yagafarov I. R., Zapevalov D. N., et al. Analysis of corrosion influencing factors of field environments of gas gathering header based on the comparative data set outcomes (on the example of the Achimov field facilities at the Urengoyskoye oil and gas condensate field) / Science & technology in the gas industry. 2022. Vol. 92. N 4. P. 44 – 51 [in Russian].

8. Kunaev R. U., Glukhova I. O., Patrushev M. G., et al. Identification of high-molecular weight naphthenic acids in crude oil and methods of management of their calcium salts deposits on Sakhalin-2 project assets / Oil Industry. 2023. N 3. P. 89 – 94 [in Russian]. DOI: 10.24887/0028-2448-2023-3-89-94

9. Fedorov I. I., Berkovich K. V., Vandysheva E. S., et al. Study of atypical organosulfur deposits in the heat-exchange equipment of primary oil refining units / Industr. Lab. Mater. Diagn. 2022. Vol. 88. N 9. P. 42 – 46 [in Russian]. DOI: 10.26896/1028-6861-2022-88-9-42-46

10. Kladova A. V., Shamsutdinova E. V. Identification of sediment samples in a well equipment / Geology, geophysics and development of oil and gas fields. 2021. Vol. 351. N 3. P. 33 – 35 [in Russian]. DOI: 10.33285/2413-5011-2021-3(351)-33-35

11. Kamal M., Hussein I., Mahmoud M., et al. Oilfield scale formation and chemical removal: a review / Journal of Petroleum Science and Engineering. 2018. Vol. 171. P. 127 – 139. DOI: 10.1016/j.petrol.2018.07.037

12. Maurice V., Marcus Ph. Progress in corrosion science at atomic and nanometric scales / Progress in Materials Science. 2018. Vol. 95. P. 132 – 171. DOI: 10.1016/j.pmatsci.2018.03.001

13. Pytskiy I. S., Kuznetsova E. S., Buryak A. K. Surface imaging in applied research / Russian Journal of Physical Chemistry A. 2022. Vol. 96. N 10. P. 2215 – 2221. DOI: 10.1134/s0036024422100260

14. Demoz A., Papavinasam S., Omotoso O., et al. Effect of Field Operational Variables on Internal Pitting Corrosion of Oil and Gas Pipelines / Corrosion. 2009. Vol. 65. N 11. P. 741 – 747. DOI: 10.5006/1.3319100

15. Vagapov R. K., Mikhalkina O. G. Study of carbon dioxide corrosion products by the X-ray diffraction method / Industr. Lab. Mater. Diagn. 2022. Vol. 88. N 9. P. 35 – 41 [in Russian]. DOI: 10.26896/1028-6861-2022-88-9-35-41

16. Dong B., Liu W., Zhang Y., et al. Comparison of the characteristics of corrosion scales covering 3Cr steel and X60 steel in CO2-H2S coexistence environment / Journal of Natural Gas Science and Engineering. 2020. Vol. 80. Art. 103371. DOI: 10.1016/j.pmatsci.2018.03.001

17. Rakitin A. R., Bozhenkova G. S., Kiselev S. A., et al. Infrared spectroscopy for quality control of corrosion inhibitors / Oilfield engineering. 2022. Vol. 647. N 11. P. 69 – 76 [in Russian]. DOI: 10.33285/0207-2351-2022-11(647)-69-76

18. Sharafieva R. R., Umarova N. N., Sopin V. F. Application of IR spectroscopy and chemometrics in the analysis of imidazolines / Bulletin of the Technological University. 2023. Vol. 26. N 6. P. 62 – 65 [in Russian]. DOI: 10.55421/1998-7072_2023_26_6_62

19. Buryak A. K., Platonova N. P., Pytsky I. S., Ulanov A. V. Mass spectrometry for investigation of corrosion processes on the surfaces of structural materials / Analytics. 2019. Vol. 9. N 2. P. 126 – 135 [in Russian]. DOI: 10.22184/2227-572X.2019.09.2.126.135

20. Kantyukov R. R., Zapevalov D. N., Vagapov R. K. Systemic approach to process and corrosion safety at processing facilities of hydrocarbon raw materials / Korroziya: materialy, zashchita. 2022. N 6. P. 19 – 28 [in Russian]. DOI: 10.31044/1813-7016-2022-0-6-19-28

21. Engel D., Northrop P. Manage contaminants in amine treating units. Part 2. Rich amine filtration, inlet separation and amine foaming / Hydrocarbon Processing. 2018. Vol. 97. N 7. P. 41 – 45.

22. Yong A., Obanijesu E. Influence of natural gas production chemicals on scale production in MEG regeneration systems / Chem. Eng. Science. 2015. Vol. 130. P. 172 – 182. DOI: 10.1016/j.ces.2015.03.037

23. Kolosov V. M., Vlasova G. V., Pivovarova N. A., Neupokoev V. A. Problems of sediment formation in technological equipment in the processing of gas condensate / Gas Industry of Russia. 2019. Vol. 781. N 3. P. 73 – 82 [in Russian].

24. Zavyalov V. V. Corrosion destruction features of gas pipelines intended for collection and transportation of associated petroleum gas / Nauch. trudu NIPI Neftegaz GNKAR. 2019. N 3. P. 70 – 75 [in Russian]. DOI: 10.5510/OGP20190300399

25. Yao W., Zhang J., Gu K., et al. Synthesis, characterization and performances of green rusts for water decontamination: a review / Environmental Pollution. 2022. Vol. 304. Art. 119205. DOI: 10.1016/j.envpol.2022.119205

26. Zhang H., Liu D., Zhao L., et al. Review on corrosion and corrosion scale formation upon unlined cast iron pipes in drinking water distribution systems / Journal of Environmental Sciences. 2022. Vol. 117. P. 173 – 189. DOI: 10.1016/j.jes.2022.04.024

27. Świetlik J., Raczyk-Stanisławiak U., Piszora P., Nawrocki J. Corrosion in drinking water pipes: The importance of green rusts / Water Research. 2012. Vol. 46. N 1. P. 1 – 10. DOI: 10.1016/j.watres.2011.10.006

28. Aissa R., Francois M., Ruby Ch., et al. Formation and crystallographical structure of hydroxysulphate and hydroxycarbonate green rusts synthetised by coprecipitation / Journal of Physics and Chemistry of Solids. 2006. Vol. 130. N 5 – 6. P. 1016 – 1019. DOI: 10.1016/j.jpcs.2006.01.020

29. Refait Ph., Abdelmoula M., Génin J.-M. Mechanisms of formation and structure of green rust one in aqueous corrosion of iron in the presence of chloride ions / Corrosion Science. 1998. Vol. 40. N 9. P. 1547 – 1560. DOI: 10.1016/S0010-938X(98)00066-3

30. Usman M., Byrne J., Chaudhary A., et al. Magnetite and green rust: synthesis, properties, and environmental applications of mixed-valent iron minerals / Chemical Reviews. 2018. Vol. 118. N 7. P. 3251 – 3304. DOI: 10.1021/acs.chemrev.7b00224

31. Burlov V. V., Altsybeeva A. I., Kuzinova T. M. Oil Refining Equipment Corrosion Protection System. — St. Petersburg: Professiya, 2015. — 336 p. [in Russian].