J.Technology and Education, Vol.33, No.1, pp.17-21 (2026)
研究論文

バナナ樹液による除錆および防錆効果の評価

 

田中 孝国^1*，河井志竜¹，出川 強志¹，武 成祥¹，桑原 敬司²

¹小山工業高等専門学校　物質工学科 (〒323-0806 小山市中久喜771)
²長岡技術科学大学 物質生物系 (〒940-2188 新潟県長岡市上富岡町1603-1)

*tanakatakakuni@oyama-ct.ac.jp

 

Evaluation of Rust Removal and Rust Prevention Effects Using Banana Sap

 

Takakuni TANAKA, Siryu KAWAI, Tsuyoshi DEGAWA, Seisho TAKE and Takashi KUWAHARA

National Institute of Technology, Oyama College
(771 Nakakuki, Oyama City, Tochigi 323-0806, JAPAN)
Nagaoka University of Technology, Department of Bioengineering
(1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, JAPAN)

 

(Received January 27, 2026; Accepted March 20, 2026)

 

　　Banana trees contain more than 80% non-potable water as sap. Sap presents challenges, as it is resistant to decay and difficult to convert into fertilizer. While sap primarily contains oxalates and phosphates, its reuse has not been explored. This study investigated the effects of oxalate and other compounds contained in banana sap. In this experiment, the concentration of oxalate and other compounds in the sap was 2757 ± 831 [mg・kg?1]. We investigated rust removal effects on iron rust samples using this sap and commercially available products. Although performance differences were significant, the sap was found to remove rust. Furthermore, the potential for rust prevention was confirmed. Analysis using EDS and SEM suggested the involvement of phosphorus, leading to results indicating that rust prevention effects through phosphate coating formation can be expected.

Key words: banana sap / oxalic acid / rust