迁移阻锈剂和电沉积双效修复对钢筋耐腐蚀性能影响研究
Study of the effects of dual-effect repair on the corrosion resistance performance of steel reinforcement using electrochemical migration rust inhibitors and electrodeposition
王柱仁 1熊传胜 1金祖权 1黄雨鑫1
作者信息
- 1. 青岛理工大学土木工程学院,青岛 266525
- 折叠
摘要
钢筋的锈蚀极大地缩短了混凝土结构的寿命.在电迁移阻锈剂的基础上,提出一种电迁移、电沉积双效修复方法,以修复锈蚀钢筋,避免二次腐蚀的发生.通过电化学阻抗谱测试、氯离子滴定法评估了双效修复效果.采用毛细吸水试验评价了双效修复对砂浆性能的影响,采用XRD和SEM测试分析了双效修复的作用机理.结果显示,双效修复显著降低了砂浆内部氯离子含量,修复后钢筋耐腐蚀性能提高了 2个数量级,乙醇胺+硫酸镁展现出最好的修复效果.此外,电沉积修复后,砂浆致密性增强,硫酸镁沉积作用最明显.
Abstract
The corrosion of steel reinforcement significantly shortens the lifespan of concrete structures.Based on electrochemical migration rust inhibitors,a dual-effect repair method involving the use of both electrochemical migration and electrodeposition is proposed to re-pair corroded steel reinforcement and prevent secondary corrosion.The dual-effect repair effects were assessed through electrochemical impedance spectroscopy tests and chloride ion titration.The impact of dual-effect repair on the mortar performance was evaluated through capillary water absorption tests.The underlying mechanisms of dual-effect repair were ana-lyzed using XRD and SEM tests.The results demonstrate that dual-effect repair significantly reduces chloride ion content inside the mortar.The corrosion resistance of the steel rein-forcement improves by two orders of magnitude after repair,with ethanolamine+magnesi-um sulfate exhibiting the best repair performance.Additionally,after electrodeposition re-pair,the mortar's compactness is enhanced,and the magnesium sulfate deposition is most pronounced.
关键词
钢筋/双效修复/耐腐蚀性能/致密性Key words
steel reinforcement/dual-effect repair/corrosion resistance performance/compactness引用本文复制引用
出版年
2024
NETL
NSTL
万方数据