Improving the long-term corrosion resistance of HVOF sprayed WC-Cr3C2-Ni coating by vacuum sealing with silicone resin
The properties of thermal sprayed WC based cermet coatings are limited by their structural defects, especially corrosion resistance. This article studied the influence of vacuum sealing with silicone resin on the long-term corrosion resistance of HVOF sprayed WC-Cr3C2-Ni coating in 3.5 wt.% NaCl sol...
| 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/S2238785423017234 |
| _version_ | 1797646756049059840 |
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| author | Ziyu Wei Lingzhi Zhang Kailin Wang Jiangbo Cheng Sheng Hong |
| author_facet | Ziyu Wei Lingzhi Zhang Kailin Wang Jiangbo Cheng Sheng Hong |
| author_sort | Ziyu Wei |
| collection | DOAJ |
| description | The properties of thermal sprayed WC based cermet coatings are limited by their structural defects, especially corrosion resistance. This article studied the influence of vacuum sealing with silicone resin on the long-term corrosion resistance of HVOF sprayed WC-Cr3C2-Ni coating in 3.5 wt.% NaCl solution. The surface morphologies of the unsealed and sealed coatings show the high compatibility between sealant and WC-Cr3C2-Ni coating. Benefiting from the block of sealant in defects, the sealed coating presents lower corrosion current density (5.843 × 10−8 A cm−2) after long-term corrosion than the unsealed coating (1.776 × 10−7 A cm−2). Owing to the vacuum treatment, sealant adequately penetrates and remains inside the WC-Cr3C2-Ni coating, and inhibits the growth of corrosion pits on the sealed coating surface. The vacuum sealing with silicone resin effectively hinders the diffusion of corrosion solution, and provides practicable strategy to improve the corrosion resistance of the coatings. |
| first_indexed | 2024-03-11T15:07:21Z |
| format | Article |
| id | doaj.art-f0bf14021300464fa620cdfccfc2d645 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:07:21Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-f0bf14021300464fa620cdfccfc2d6452023-10-30T06:02:43ZengElsevierJournal of Materials Research and Technology2238-78542023-09-0126344355Improving the long-term corrosion resistance of HVOF sprayed WC-Cr3C2-Ni coating by vacuum sealing with silicone resinZiyu Wei0Lingzhi Zhang1Kailin Wang2Jiangbo Cheng3Sheng Hong4College of Mechanics and Materials, Hohai University, 8 Focheng West Road, Nanjing 211100, PR ChinaCollege of Mechanics and Materials, Hohai University, 8 Focheng West Road, Nanjing 211100, PR ChinaCollege of Mechanics and Materials, Hohai University, 8 Focheng West Road, Nanjing 211100, PR ChinaCollege of Mechanics and Materials, Hohai University, 8 Focheng West Road, Nanjing 211100, PR ChinaCorresponding author.; College of Mechanics and Materials, Hohai University, 8 Focheng West Road, Nanjing 211100, PR ChinaThe properties of thermal sprayed WC based cermet coatings are limited by their structural defects, especially corrosion resistance. This article studied the influence of vacuum sealing with silicone resin on the long-term corrosion resistance of HVOF sprayed WC-Cr3C2-Ni coating in 3.5 wt.% NaCl solution. The surface morphologies of the unsealed and sealed coatings show the high compatibility between sealant and WC-Cr3C2-Ni coating. Benefiting from the block of sealant in defects, the sealed coating presents lower corrosion current density (5.843 × 10−8 A cm−2) after long-term corrosion than the unsealed coating (1.776 × 10−7 A cm−2). Owing to the vacuum treatment, sealant adequately penetrates and remains inside the WC-Cr3C2-Ni coating, and inhibits the growth of corrosion pits on the sealed coating surface. The vacuum sealing with silicone resin effectively hinders the diffusion of corrosion solution, and provides practicable strategy to improve the corrosion resistance of the coatings.http://www.sciencedirect.com/science/article/pii/S2238785423017234WC-Cr3C2-Ni coatingHVOFLong-term corrosionVacuum sealingSilicone resin |
| spellingShingle | Ziyu Wei Lingzhi Zhang Kailin Wang Jiangbo Cheng Sheng Hong Improving the long-term corrosion resistance of HVOF sprayed WC-Cr3C2-Ni coating by vacuum sealing with silicone resin Journal of Materials Research and Technology WC-Cr3C2-Ni coating HVOF Long-term corrosion Vacuum sealing Silicone resin |
| title | Improving the long-term corrosion resistance of HVOF sprayed WC-Cr3C2-Ni coating by vacuum sealing with silicone resin |
| title_full | Improving the long-term corrosion resistance of HVOF sprayed WC-Cr3C2-Ni coating by vacuum sealing with silicone resin |
| title_fullStr | Improving the long-term corrosion resistance of HVOF sprayed WC-Cr3C2-Ni coating by vacuum sealing with silicone resin |
| title_full_unstemmed | Improving the long-term corrosion resistance of HVOF sprayed WC-Cr3C2-Ni coating by vacuum sealing with silicone resin |
| title_short | Improving the long-term corrosion resistance of HVOF sprayed WC-Cr3C2-Ni coating by vacuum sealing with silicone resin |
| title_sort | improving the long term corrosion resistance of hvof sprayed wc cr3c2 ni coating by vacuum sealing with silicone resin |
| topic | WC-Cr3C2-Ni coating HVOF Long-term corrosion Vacuum sealing Silicone resin |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423017234 |
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