アルミニウム溶射橋梁へのレーザークリーニング工法を適用した部分補修方法の検討

• Published in: Kou kouzou rombunshuu Vol. 32; no. 125; pp. 125_58 - 125_69
• Main Authors: 桑名, 弘暁, 新免, 謙一, 蓮池, 里菜, 麻生, 稔彦
• Format: Journal Article
• Language: Japanese
• Published: 一般社団法人 日本鋼構造協会 27.03.2025; Japanese Society of Steel Construction
• Subjects: Al溶射; combined corrosion cycle test; corrosion resistance; laser cleaning; partial deterioration; Thermal sprayed aluminum coating; レーザークリーニング; 複合サイクル試験; 部分劣化; 防食性
• ISSN: 1880-9928; 1884-0329
• DOI: 10.11273/jssc.32.125_58

Thermal sprayed aluminum coating has been applied to many steel bridges in Japan since around 2000 due to its high corrosion resistance even in harsh salt environments. However, in recent years, partial deterioration has been observed in aluminum-sprayed bridges. In this study, we investigated a repair method for the partial deterioration of aluminum-sprayed bridges using laser cleaning, which has superior environmental performance. We applied laser cleaning to the corroded test specimens that had undergone aluminum thermal spraying, followed by repair spraying with Al-5Mg alloy. The results confirmed that this repair method exhibits high corrosion resistance.