Fabrication of the anticorrosive and electroconductive film on Al alloys using the steam coating process

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H02482
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 26050:Material processing and microstructure control-related
• Research Institution: Shibaura Institute of Technology
• Principal Investigator: SERIZAWA Ai 芝浦工業大学, 工学部, 准教授 (90509374)
• Co-Investigator(Kenkyū-buntansha): 石崎 貴裕 芝浦工業大学, 工学部, 教授 (50397486)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 導電性皮膜 / 耐食性皮膜 / アルミニウム合金 / ヘテロ構造 / 燃料電池用金属セパレータ

Outline of Final Research Achievements

The novel technology to fabricate an anticorrosive film with high electrical conductivity on a lightweight aluminum alloy substrate was developed in this study. The strategy for the fabrication of the film was to realize a hydroxide/carbon heterostructured film by homogeneously dispersing carbon nanoparticles in the hydroxide film formed by the steam process originally developed by the applicant. As a result, by adding ascorbic acid to the steam source, carbon nanoparticles were generated simultaneously with the formation of hydroxide crystals during the steam process and were successfully dispersed uniformly in the hydroxide film. The heterostructured film showed high corrosion resistance even in sulfuric acid, and its electrical conductivity is about four orders of magnitude higher than that of the hydroxide film.

Free Research Field

材料工学

Academic Significance and Societal Importance of the Research Achievements

研究代表者のオリジナル技術である水蒸気プロセスを利用することで、水酸化物とカーボンからなるヘテロ構造皮膜をアルミニウム合金上に均一に作製する技術開発に成功した結果、導電性、耐食性ともに大幅に向上することを確認することができた。本技術は、導電性が必要な部材への表面処理法として、さらにはアルミニウム合金製セパレータ等の電池材料の製造に対して大きなアドバンテージとなることが考えられ、学術的にも産業的にも重要な知見である。