Investigation on pitting corrosion mechanism of the Fe-based amorphous alloy coating by three-dimensional X-ray imaging at micro-scale
Few work have been performed regarding the quantitative characterization of three-dimensional (3D) pitting corrosion process directly, although the corrosion behaviors and the passivation film stability of metals in various solutions have been studied heavily. The reported work quantitatively charac...
| 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/S2238785423021518 |
| _version_ | 1827780446656659456 |
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| author | Mengru Wang Yan Zhong Dandan Liang Tao Liu Xianshun Wei Yongming Zhang Bo Chen |
| author_facet | Mengru Wang Yan Zhong Dandan Liang Tao Liu Xianshun Wei Yongming Zhang Bo Chen |
| author_sort | Mengru Wang |
| collection | DOAJ |
| description | Few work have been performed regarding the quantitative characterization of three-dimensional (3D) pitting corrosion process directly, although the corrosion behaviors and the passivation film stability of metals in various solutions have been studied heavily. The reported work quantitatively characterized the 3D pitting corrosion of the Fe-based amorphous alloy coating (Fe-based AAC) via X-ray micro-computed tomography (X-ray micro-CT) and further elucidated the mechanism of its pitting corrosion. Moreover, the microstructure and electrochemical performance of the Fe-based AAC have also been explored. The results showed that the targeted thermal sprayed Fe43Cr20Mo10W4C15B6Y2 coating was prone to be corroded with the increase of the hydrogen ion concentration, i.e. higher hydrogen ion concentration leads to poorer corrosion performance of the Fe-based AAC. The X-ray micro-CT results revealed that the pits in the Fe-based AAC initially nucleated below the pitting potential, and they also generated in the over-passivation stage. Furthermore, it was found that the corrosive medium does not penetrate into the coating/substrate interface, and the deduced corrosion mechanism from the findings was also discussed. |
| first_indexed | 2024-03-11T15:04:43Z |
| format | Article |
| id | doaj.art-67e3d25a85404286a0c18ddc92671092 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:04:43Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-67e3d25a85404286a0c18ddc926710922023-10-30T06:04:20ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012664056418Investigation on pitting corrosion mechanism of the Fe-based amorphous alloy coating by three-dimensional X-ray imaging at micro-scaleMengru Wang0Yan Zhong1Dandan Liang2Tao Liu3Xianshun Wei4Yongming Zhang5Bo Chen6Key Laboratory of Advanced Civil Engineering Materials (Ministry of Education), School of Materials Science and Engineering, Tongji University, Shanghai 201804, ChinaShanghai Highway Investment Construction and Development Co., Ltd., Shanghai 200336, ChinaShanghai Engineering Research Center of Physical Vapor Deposition (PVD) Superhard Coating and Equipment, Shanghai Institute of Technology, Shanghai 201418, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, ChinaKey Laboratory of Advanced Civil Engineering Materials (Ministry of Education), School of Materials Science and Engineering, Tongji University, Shanghai 201804, ChinaKey Laboratory of Advanced Civil Engineering Materials (Ministry of Education), School of Materials Science and Engineering, Tongji University, Shanghai 201804, ChinaKey Laboratory of Advanced Civil Engineering Materials (Ministry of Education), School of Materials Science and Engineering, Tongji University, Shanghai 201804, China; Corresponding author.Few work have been performed regarding the quantitative characterization of three-dimensional (3D) pitting corrosion process directly, although the corrosion behaviors and the passivation film stability of metals in various solutions have been studied heavily. The reported work quantitatively characterized the 3D pitting corrosion of the Fe-based amorphous alloy coating (Fe-based AAC) via X-ray micro-computed tomography (X-ray micro-CT) and further elucidated the mechanism of its pitting corrosion. Moreover, the microstructure and electrochemical performance of the Fe-based AAC have also been explored. The results showed that the targeted thermal sprayed Fe43Cr20Mo10W4C15B6Y2 coating was prone to be corroded with the increase of the hydrogen ion concentration, i.e. higher hydrogen ion concentration leads to poorer corrosion performance of the Fe-based AAC. The X-ray micro-CT results revealed that the pits in the Fe-based AAC initially nucleated below the pitting potential, and they also generated in the over-passivation stage. Furthermore, it was found that the corrosive medium does not penetrate into the coating/substrate interface, and the deduced corrosion mechanism from the findings was also discussed.http://www.sciencedirect.com/science/article/pii/S2238785423021518Fe-based amorphous alloy coating (Fe-based AAC)Corrosion behaviorX-ray micro-computed tomography (X-ray micro-CT)Three-dimensional analysisPitting corrosion |
| spellingShingle | Mengru Wang Yan Zhong Dandan Liang Tao Liu Xianshun Wei Yongming Zhang Bo Chen Investigation on pitting corrosion mechanism of the Fe-based amorphous alloy coating by three-dimensional X-ray imaging at micro-scale Journal of Materials Research and Technology Fe-based amorphous alloy coating (Fe-based AAC) Corrosion behavior X-ray micro-computed tomography (X-ray micro-CT) Three-dimensional analysis Pitting corrosion |
| title | Investigation on pitting corrosion mechanism of the Fe-based amorphous alloy coating by three-dimensional X-ray imaging at micro-scale |
| title_full | Investigation on pitting corrosion mechanism of the Fe-based amorphous alloy coating by three-dimensional X-ray imaging at micro-scale |
| title_fullStr | Investigation on pitting corrosion mechanism of the Fe-based amorphous alloy coating by three-dimensional X-ray imaging at micro-scale |
| title_full_unstemmed | Investigation on pitting corrosion mechanism of the Fe-based amorphous alloy coating by three-dimensional X-ray imaging at micro-scale |
| title_short | Investigation on pitting corrosion mechanism of the Fe-based amorphous alloy coating by three-dimensional X-ray imaging at micro-scale |
| title_sort | investigation on pitting corrosion mechanism of the fe based amorphous alloy coating by three dimensional x ray imaging at micro scale |
| topic | Fe-based amorphous alloy coating (Fe-based AAC) Corrosion behavior X-ray micro-computed tomography (X-ray micro-CT) Three-dimensional analysis Pitting corrosion |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423021518 |
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