Semi-crystalline design of SiB6-modified enamel coatings: Towards long-term synergistic resistance to hydrothermal corrosion
Defects such as bubble pores and cracks of enamel coating accelerate failure in hydrothermal conditions. Here, a trace amount of SiB6 modified enamel coating prepared at a low sintering temperature showed promising hydrothermal corrosion resistance at 80–600 °C. The semi-crystalline enamel coatings...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425019040 |
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| Summary: | Defects such as bubble pores and cracks of enamel coating accelerate failure in hydrothermal conditions. Here, a trace amount of SiB6 modified enamel coating prepared at a low sintering temperature showed promising hydrothermal corrosion resistance at 80–600 °C. The semi-crystalline enamel coatings modified by 1 wt% SiB6 demonstrated enhanced amorphization degree and exhibited a minimal mass change of ∼0.01 % after 480 h. Compared to the undoped coatings, both the equivalent coating electrochemical resistance and charge transfer resistance at the coating/substrate interface were increased by 2∼3 times. A significant amount of flocculent products sealed in the residual pores of the SiB6 modified enamel coating during hydrothermal reaction process, preventing gaseous H2O to migrate to the interface of the steel substrate. This study highlights the synergistic optimization of the amorphous phase and residual stress to dynamically regulate the coating hydrothermal corrosion resistance through a strategic interplay of composition and microstructure design. |
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| ISSN: | 2238-7854 |