A Study on Corrosion Prevention of Steel in Cement Hardened Matrix under magnetic Field

2015 Fiscal Year Final Research Report

• Project/Area Number: 26630204
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Civil engineering materials/Construction/Construction management
• Research Institution: Kyushu University
• Principal Investigator: Hamada Hidenori 九州大学, 工学(系)研究科(研究院), 教授 (70344314)
• Co-Investigator(Kenkyū-buntansha): SAGAWA Yasutaka 九州大学, 大学院工学研究院, 准教授 (10325508) ; YAMAMOTO Daisuke 九州大学, 大学院工学研究院, 技術職員 (40398095)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: コンクリート構造物 / 鋼材の腐食 / 鋼材の防食 / 構造物の耐久性向上 / 磁気防食 / 磁性材料 / 補修補強 / 維持管理

Outline of Final Research Achievements

Chloride attack on reinforced concrete is caused by steel corrosion induced by chloride ingress into concrete. Due to the chloride attack, service life of reinforced concrete is largely decreased. There are many techniques which countermeasure the chloride attack. However, the method which can prevent or stop corrosion reaction itself is only cathodic protection. At present, a few researches show that under strong magnetic field, corrosion of some kind of metals can be prevented. On the other hand, steel bar in cement hardened matrix mixed with steel fiber is in protected condition against corrosion.This study aims to combine above two similar research results, and to investigate the possibility and mechanism of corrosion prevention by magnetic field.

Free Research Field

コンクリート工学および腐食防食工学