Localized corrosion induced by MnS inclusions in U71Mn rail steels
To understand the corrosion mechanisms of rail steels, immersion tests were conducted on U71Mn rail steels produced in 1994 and 2021. It was observed that, at the onset of corrosion, only matrix near clustered MnS inclusions dissolved. Further characterization revealed that this was due to the combi...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424025560 |
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| author | Chao Ji Liya Guo Haiyang Wang Tengshi Liu Xicheng Wei Han Dong |
| author_facet | Chao Ji Liya Guo Haiyang Wang Tengshi Liu Xicheng Wei Han Dong |
| author_sort | Chao Ji |
| collection | DOAJ |
| description | To understand the corrosion mechanisms of rail steels, immersion tests were conducted on U71Mn rail steels produced in 1994 and 2021. It was observed that, at the onset of corrosion, only matrix near clustered MnS inclusions dissolved. Further characterization revealed that this was due to the combined effects of lower Volta potential, higher lattice distortion of the surrounding matrix, and strip-shaped carbides in the surrounding matrix induced by the clustered distribution of MnS. Consequently, the U71Mn2021 rail steel, with fewer MnS clusters formed, exhibited better corrosion resistance, as evidenced with electrochemical measurements. These findings suggest that refined processing techniques to control inclusion formation could be effective methods for developing U71Mn rail steels with greater corrosion resistance. |
| format | Article |
| id | doaj-art-e1fed6d41cf74634b29631569b82de20 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-e1fed6d41cf74634b29631569b82de202025-08-20T02:39:05ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01336534654510.1016/j.jmrt.2024.11.028Localized corrosion induced by MnS inclusions in U71Mn rail steelsChao Ji0Liya Guo1Haiyang Wang2Tengshi Liu3Xicheng Wei4Han Dong5School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing 314100, ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing 314100, China; Corresponding authorSchool of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China.School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing 314100, ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing 314100, ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing 314100, ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing 314100, ChinaTo understand the corrosion mechanisms of rail steels, immersion tests were conducted on U71Mn rail steels produced in 1994 and 2021. It was observed that, at the onset of corrosion, only matrix near clustered MnS inclusions dissolved. Further characterization revealed that this was due to the combined effects of lower Volta potential, higher lattice distortion of the surrounding matrix, and strip-shaped carbides in the surrounding matrix induced by the clustered distribution of MnS. Consequently, the U71Mn2021 rail steel, with fewer MnS clusters formed, exhibited better corrosion resistance, as evidenced with electrochemical measurements. These findings suggest that refined processing techniques to control inclusion formation could be effective methods for developing U71Mn rail steels with greater corrosion resistance.http://www.sciencedirect.com/science/article/pii/S2238785424025560MnSCorrosionInclusionRail steel |
| spellingShingle | Chao Ji Liya Guo Haiyang Wang Tengshi Liu Xicheng Wei Han Dong Localized corrosion induced by MnS inclusions in U71Mn rail steels Journal of Materials Research and Technology MnS Corrosion Inclusion Rail steel |
| title | Localized corrosion induced by MnS inclusions in U71Mn rail steels |
| title_full | Localized corrosion induced by MnS inclusions in U71Mn rail steels |
| title_fullStr | Localized corrosion induced by MnS inclusions in U71Mn rail steels |
| title_full_unstemmed | Localized corrosion induced by MnS inclusions in U71Mn rail steels |
| title_short | Localized corrosion induced by MnS inclusions in U71Mn rail steels |
| title_sort | localized corrosion induced by mns inclusions in u71mn rail steels |
| topic | MnS Corrosion Inclusion Rail steel |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424025560 |
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