Effect of acid salt spray corrosion on abradability of Al-BN coatings
To explore the influence of acid salt spray corrosion on the abradability behavior of Al-BN coatings， the microstructure， surface hardness， bonding strength， and abradability of Al-BN coatings prepared by atmospheric plasma spraying before and after acid salt spray corrosion for 192 h are investigat...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Materials Engineering
2025-02-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | https://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2024.000302 |
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| Summary: | To explore the influence of acid salt spray corrosion on the abradability behavior of Al-BN coatings， the microstructure， surface hardness， bonding strength， and abradability of Al-BN coatings prepared by atmospheric plasma spraying before and after acid salt spray corrosion for 192 h are investigated.The results show that after acidic salt spray corrosion for 192 h， the surface of the Al-BN coatings forms a corrosion dense layer composed of Al， Al2O3， NaCl， and BN with the thickness of about 300-350 μm. The variance of average hardness and average bonding strength of the corrosion-dense layer increases compared to the as-sprayed coating. During the scraping process， the weak bonding areas of the corrosion-dense layer are prone to scraping off and adhere to the friction surface of the dual blade， which causes the incursion depth ratio（IDR）values of the Al-BN coatings to change from （11.43±0.46）% before acid salt spray corrosion to （-12.02±0.38）% after acid salt spray corrosion， resulting in the abradability scraping mechanism of the Al-BN coatings changing from the mixed form of plastic deformation and adhesive wear to the mixed mechanism of plastic deformation， adhesive wear， and scraping off adhesion， the friction coefficient increasing from 0.34±0.02 before corrosion to 0.55±0.03. Therefore， the acid salt spray corrosion has a negative impact on the abradability of Al-BN coatings. |
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| ISSN: | 1001-4381 |