Enhanced Hot Salt-Water Corrosion Resistance of NiCoCrAlY-AlSiY Coating by Ion-Beam-Assisted Deposition
| Autor: | Enlei Wang, Zhiguo Wang, Suying Hu, Zhiwen Xie, Yanhui Zhao, Yan Tang, Lin Xiang, Guanming Xue, Yihe Wang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
ion-beam-assisted deposition
Materials science corrosion Diffusion diffusion Oxide Hydrochloric acid Surfaces and Interfaces engineering.material Engineering (General). Civil engineering (General) thermal protective coatings Surfaces Coatings and Films Corrosion chemistry.chemical_compound Coating chemistry Chemical engineering Materials Chemistry engineering Texture (crystalline) TA1-2040 Ion beam-assisted deposition Layer (electronics) |
| Zdroj: | Coatings Volume 11 Issue 9 Coatings, Vol 11, Iss 1062, p 1062 (2021) |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings11091062 |
| Popis: | A promising ion-beam-assisted deposition (IBAD) method was developed to improve the salt-water corrosion resistance of NiCoCrAlY-AlSiY coating. During hot salt-water exposure, hydrochloric acid (HCl) was produced when chloride salt, water, and metal oxide reacted with each other, while HCl was also produced when chlorine reacted with water. The as-deposited AlSiY layer exhibited a loose texture accompanied by numerous pore defects, which triggered the multi-scale diffusion of HCl, resulting in the large-area corrosion degradation of the coating texture and the rapid diffusion of the NiCoCrAlY bonding layer. By contrast, the ion-beam-assisted AlSiY layer showed a dense texture that effectively inhibited the inner diffusion of HCl and suppressed the corrosion reactions as well as the diffusion of the NiCoCrAlY bonding layer. The current results confirmed the significant potential of IBAD in inhibiting corrosion damage and diffusion of thermal protective coatings. |
| Databáze: | OpenAIRE |
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