2021 Fiscal Year Final Research Report
Fabrication of super corrosion-resistant aluminum materials based on the optimal design of surface nanostructures
| Project/Area Number |
19H02470
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 26050:Material processing and microstructure control-related
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | アノード酸化 / アルミニウム / ポーラス皮膜 / 耐食性 |
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| Outline of Final Research Achievements |
The formation behaviors of the anodic aluminum oxide film formed on high-purity aluminum and various aluminum alloys were investigated by anodizing in novel electrolyte solutions. The structural changes of the anodic aluminum oxide were discussed by high-resolution electron microscopy, and their nanomorphology can be accurately controlled by the choosing of appropriate anodizing conditions. A corrosion-resistant aluminum plate covered with a novel porous alumina film could be successfully fabricated by anodizing aluminum in etidronic acid, pyrophosphoric acid, and sodium tetraborate solutions.
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| Free Research Field |
材料表面科学、電気化学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の遂行により得られたナノ構造制御型のポーラス型アノード酸化皮膜をアルミニウムおよびその合金表面に形成することにより、従来のアルマイト皮膜形成アルミニウムの耐食性を上回る、極めて高い耐食性をもつ新規なアルミニウム材料として応用することが期待できる。このようなアルミニウム材料は、メンテナンス期間の長い、またはメンテナンスフリーの金属材料として、持続可能な社会の発展に資すると予想される。
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