| Autor: |
ZHAO Changyu, YANG Ruisheng, ZHANG Hua, GUO Qilong, SHAO Tongge, LIU Guanri |
| Jazyk: |
čínština |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Journal of Aeronautical Materials, Vol 40, Iss 2, Pp 28-34 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
1005-5053 |
| DOI: |
10.11868/j.issn.1005-5053.2019.000057 |
| Popis: |
In order to improve the corrosion resistance of the friction stir welding (FSW), the Al coating was prepared on the 2219 aluminum alloy friction stir welding joint via cold spraying technology. The structure and corrosion resistance of the Al coating were characterized by digital microscope, scanning electron microscope and electrochemical workstation. The results indicate that Al coating deposited by cold spraying technology on the FSW joint is a compact structure, and the porosity is 0.77%. There are equiaxed crystals, refined grains and elongated grains in the coating. The interface of the coating is mainly mechanical occlusion. The interface quality of the coating/joint area is obviously better than that of the coating/BM. Coating corrosion sensitivity is lower than that of FSW joints, and the corrosion potential and corrosion current density of the coating are far below the heat affected zone. Cold spray coating reduces the corrosion sensitivity of FSW joints. The intergranular corrosion test shows that the corrosion resistance of the coating is better than that of the FSW joint. In terms of corrosion depth, the coating is only 50% of HAZ after 6 h’s corrosion. The cold spray technology prominently improves the corrosion resistance of the FSW joint. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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