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[I-402] Evaluation of the effect of water absorption and water retention of cross-linked acrylate fiber sheet used in atmospheric sacrificial anodic corrosion protection on its corrosion current

*竹田 智紀¹、貝沼 重信¹、山下 和也¹、石原 修二²、井上 大地⁴、兼子 彬³、山内 孝郎⁵ (1. 九州大学、2. （株）三井E&Sマシナリー、3. 日本軽金属（株）、4. （株）三井E&S鉄構エンジニアリング、5. 日本エクスラン工業（株）)

Keywords:Sacrificial anode, Fiber sheet, Hygroscopic, corrosion

We have developed a sacrificial anodic corrosion protection technology using Al-3% Zn alloy cast sheet and crosslinked acrylate fiber sheet as a new corrosion protection method. However, the effect of the fiber sheet used for a long time on this technology on the corrosion current is unknown. The purpose of this study was to clarify the relationship between relative humidity and anticorrosion current density, focusing on the water absorption and water retention of the fiber sheet used. As a result, although the fiber sheet used in the bridge deteriorated compared with the unused sheet, it became clear that there was no problem in practical use.