Stress corrosion of HAZ subdivision of X80 pipeline steel in sterile high-sulfate soil
The welding heat affected zone (HAZ) is a high-risk region of corrosion, and influenced by multi-factors, such as stress, microbe and microstructure. Sulfate reducing bacteria (SRB) enhance the corrosion of the stressed HAZs, especially coarse-grained HAZ (CGHAZ). CGHAZ has least percentage of HAGBs...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423022238 |
| _version_ | 1797646683878719488 |
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| author | Youjun Yu Jin Xu Tingxi Chai Baixing Liu Cheng Sun |
| author_facet | Youjun Yu Jin Xu Tingxi Chai Baixing Liu Cheng Sun |
| author_sort | Youjun Yu |
| collection | DOAJ |
| description | The welding heat affected zone (HAZ) is a high-risk region of corrosion, and influenced by multi-factors, such as stress, microbe and microstructure. Sulfate reducing bacteria (SRB) enhance the corrosion of the stressed HAZs, especially coarse-grained HAZ (CGHAZ). CGHAZ has least percentage of HAGBs, largest effective grain size, and highest volume fraction of MA island, which leads to the severer corrosion. SRB accelerate the localized corrosion of steel HAZs, and the maximum pitting depths of CGHAZ with and without SRB reach 9.97 and 7.65 μm, respectively. The elastic stress lowers the equilibrium potential and weakens the protective ability of film, which boosts the corrosion process, while SRB further enhance this accelerating effect of the stress on the corrosion. |
| first_indexed | 2024-03-11T15:05:12Z |
| format | Article |
| id | doaj.art-dae2c27b50de4ef3acea7ef741d383fe |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:05:12Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-dae2c27b50de4ef3acea7ef741d383fe2023-10-30T06:04:35ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012682298241Stress corrosion of HAZ subdivision of X80 pipeline steel in sterile high-sulfate soilYoujun Yu0Jin Xu1Tingxi Chai2Baixing Liu3Cheng Sun4School of Bailie Mechanical Engineering, Lanzhou City University, Lanzhou, 730070, China; Gansu Welding Technology and Welding Quality Evaluation Engineering Research Center, Lanzhou, 730070, China; Corresponding author. School of Bailie Mechanical Engineering, Lanzhou City University, Lanzhou, 730070, China.Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Liaoning Shenyang Soil and Atmosphere Material Corrosion National Observation and Research Station, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Corresponding author. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.School of Bailie Mechanical Engineering, Lanzhou City University, Lanzhou, 730070, ChinaSchool of Bailie Mechanical Engineering, Lanzhou City University, Lanzhou, 730070, ChinaInstitute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China; Liaoning Shenyang Soil and Atmosphere Material Corrosion National Observation and Research Station, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, ChinaThe welding heat affected zone (HAZ) is a high-risk region of corrosion, and influenced by multi-factors, such as stress, microbe and microstructure. Sulfate reducing bacteria (SRB) enhance the corrosion of the stressed HAZs, especially coarse-grained HAZ (CGHAZ). CGHAZ has least percentage of HAGBs, largest effective grain size, and highest volume fraction of MA island, which leads to the severer corrosion. SRB accelerate the localized corrosion of steel HAZs, and the maximum pitting depths of CGHAZ with and without SRB reach 9.97 and 7.65 μm, respectively. The elastic stress lowers the equilibrium potential and weakens the protective ability of film, which boosts the corrosion process, while SRB further enhance this accelerating effect of the stress on the corrosion.http://www.sciencedirect.com/science/article/pii/S2238785423022238SRB induced corrosionElastic stressX80 steelCGHAZSaline soil |
| spellingShingle | Youjun Yu Jin Xu Tingxi Chai Baixing Liu Cheng Sun Stress corrosion of HAZ subdivision of X80 pipeline steel in sterile high-sulfate soil Journal of Materials Research and Technology SRB induced corrosion Elastic stress X80 steel CGHAZ Saline soil |
| title | Stress corrosion of HAZ subdivision of X80 pipeline steel in sterile high-sulfate soil |
| title_full | Stress corrosion of HAZ subdivision of X80 pipeline steel in sterile high-sulfate soil |
| title_fullStr | Stress corrosion of HAZ subdivision of X80 pipeline steel in sterile high-sulfate soil |
| title_full_unstemmed | Stress corrosion of HAZ subdivision of X80 pipeline steel in sterile high-sulfate soil |
| title_short | Stress corrosion of HAZ subdivision of X80 pipeline steel in sterile high-sulfate soil |
| title_sort | stress corrosion of haz subdivision of x80 pipeline steel in sterile high sulfate soil |
| topic | SRB induced corrosion Elastic stress X80 steel CGHAZ Saline soil |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423022238 |
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