Elemental sulfur corrosion of nickel-based alloy 825 in CO2–H2S-containing environment at high temperature and high pressure
The elemental sulfur corrosion resistance and corrosion mechanisms of nickel-based alloy 825 at high temperature and high pressure are still missing. This work investigates the elemental sulfur corrosion of nickel-based alloy 825 in CO2–H2S-containing environment at high temperature and high pressur...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423015466 |
| _version_ | 1797745178437484544 |
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| author | Haonan Li Xiankang Zhong Jiuyi Li Tianlei Li Ke Li |
| author_facet | Haonan Li Xiankang Zhong Jiuyi Li Tianlei Li Ke Li |
| author_sort | Haonan Li |
| collection | DOAJ |
| description | The elemental sulfur corrosion resistance and corrosion mechanisms of nickel-based alloy 825 at high temperature and high pressure are still missing. This work investigates the elemental sulfur corrosion of nickel-based alloy 825 in CO2–H2S-containing environment at high temperature and high pressure using weight loss measurement, surface characterization and in-situ electrochemical techniques including electrochemical noise, electrochemical impedance spectroscopy as well as polarization curves. The results show that in the absence of elemental sulfur nickel-based alloy 825 hardly corrodes in the environment containing 0.5 MPa CO2 and 1.6 MPa H2S at 100 °C, since the passive film on the substrate could offer an enough protective performance. However, with the increasing elemental sulfur content, the corrosion of nickel-based alloy 825 becomes more and more obvious. Under the condition of full coverage of elemental sulfur, the uniform corrosion rate of the specimen can be as high as 0.327 mm/y. Moreover, under such a condition, serious localized corrosion could also be observed on the specimen surface. Based on results of electrochemical measurement and surface analysis, it is considered that underneath the elemental sulfur deposit the formation of a strong acidic environment generated from the hydrolysis of elemental sulfur largely destroys the passive film, leading to serious corrosion. Therefore, nickel-based alloy 825 used in high sulfur-containing environment should pay close attention to safety risk from elemental sulfur corrosion. The results of this work could provide a reference for the material selection in high sulfur natural gas field. |
| first_indexed | 2024-03-12T15:19:40Z |
| format | Article |
| id | doaj.art-2e622390f5654457b878eea6eb27f8eb |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-12T15:19:40Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-2e622390f5654457b878eea6eb27f8eb2023-08-11T05:34:14ZengElsevierJournal of Materials Research and Technology2238-78542023-07-012552605276Elemental sulfur corrosion of nickel-based alloy 825 in CO2–H2S-containing environment at high temperature and high pressureHaonan Li0Xiankang Zhong1Jiuyi Li2Tianlei Li3Ke Li4State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China; Tianfu Yongxing Laboratory, Chengdu, 610500, Sichuan, China; Corresponding author. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China.Beijing Advanced Innovation Center for Materials Genome Engineering, Key Laboratory for Corrosion and Protection (MOE), Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, ChinaSouthwest Branch of China Petroleum Engineering Construction Co. LTD, Chengdu, 610041, ChinaSouthwest Branch of China Petroleum Engineering Construction Co. LTD, Chengdu, 610041, ChinaThe elemental sulfur corrosion resistance and corrosion mechanisms of nickel-based alloy 825 at high temperature and high pressure are still missing. This work investigates the elemental sulfur corrosion of nickel-based alloy 825 in CO2–H2S-containing environment at high temperature and high pressure using weight loss measurement, surface characterization and in-situ electrochemical techniques including electrochemical noise, electrochemical impedance spectroscopy as well as polarization curves. The results show that in the absence of elemental sulfur nickel-based alloy 825 hardly corrodes in the environment containing 0.5 MPa CO2 and 1.6 MPa H2S at 100 °C, since the passive film on the substrate could offer an enough protective performance. However, with the increasing elemental sulfur content, the corrosion of nickel-based alloy 825 becomes more and more obvious. Under the condition of full coverage of elemental sulfur, the uniform corrosion rate of the specimen can be as high as 0.327 mm/y. Moreover, under such a condition, serious localized corrosion could also be observed on the specimen surface. Based on results of electrochemical measurement and surface analysis, it is considered that underneath the elemental sulfur deposit the formation of a strong acidic environment generated from the hydrolysis of elemental sulfur largely destroys the passive film, leading to serious corrosion. Therefore, nickel-based alloy 825 used in high sulfur-containing environment should pay close attention to safety risk from elemental sulfur corrosion. The results of this work could provide a reference for the material selection in high sulfur natural gas field.http://www.sciencedirect.com/science/article/pii/S2238785423015466Elemental sulfur corrosionLocalized corrosionPassive filmElectrochemical measurement |
| spellingShingle | Haonan Li Xiankang Zhong Jiuyi Li Tianlei Li Ke Li Elemental sulfur corrosion of nickel-based alloy 825 in CO2–H2S-containing environment at high temperature and high pressure Journal of Materials Research and Technology Elemental sulfur corrosion Localized corrosion Passive film Electrochemical measurement |
| title | Elemental sulfur corrosion of nickel-based alloy 825 in CO2–H2S-containing environment at high temperature and high pressure |
| title_full | Elemental sulfur corrosion of nickel-based alloy 825 in CO2–H2S-containing environment at high temperature and high pressure |
| title_fullStr | Elemental sulfur corrosion of nickel-based alloy 825 in CO2–H2S-containing environment at high temperature and high pressure |
| title_full_unstemmed | Elemental sulfur corrosion of nickel-based alloy 825 in CO2–H2S-containing environment at high temperature and high pressure |
| title_short | Elemental sulfur corrosion of nickel-based alloy 825 in CO2–H2S-containing environment at high temperature and high pressure |
| title_sort | elemental sulfur corrosion of nickel based alloy 825 in co2 h2s containing environment at high temperature and high pressure |
| topic | Elemental sulfur corrosion Localized corrosion Passive film Electrochemical measurement |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423015466 |
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