Active and passive protection of steel reinforcement in concrete column using carbon fibre reinforced polymer against corrosion
Active and passive protection of steel reinforcement in concrete column using carbon fibre reinforced polymer against corrosion
复制标题
使用碳纤维增强聚合物对混凝土柱中的钢筋进行主动和被动保护以防止腐蚀
DOI：
10.1016/j.electacta.2018.05.037
复制
发表时间：
2018-07-10
影响因子：
6.6
通讯作者：
Tang, Wen-shui
中科院分区：
文献类型：
--
作者：
Lu, Yi-yan;Hu, Ji-yue;Tang, Wen-shui
本研究的目的是调查主动和被动保护的效率的预腐蚀钢筋混凝土（RC）柱使用外部粘结的碳纤维增强聚合物（CFRP）包裹。主动保护是一种新型的防腐技术，它是利用碳纤维复合材料（CFRP）包裹物作为外加电流阴极保护（ICCP）的阳极。被动保护表示CFRP织物的抗腐蚀性能。9个钢筋混凝土柱具有不同程度的腐蚀（理论质量损失的1%，3%和6%），然后处理不同的保护方法（无保护，被动保护，主动保护），通过将它们暴露于干湿循环。通过测量钢电位，线性极化，和电化学阻抗谱（EIS）的所有调查标本，主动保护的效率被发现是密切相关的程度的预腐蚀的保护标本。此外，主动保护的效率随着时间的推移而下降，这可能是由于CFRP阳极和CFRP/混凝土界面的劣化。被动保护在任何情况下都被证明是有效的，然而，它只能减缓腐蚀过程，但不能阻止引起的腐蚀反应。(C)2018爱思唯尔有限公司版权所有
This study aims to investigate the efficiency of active and passive protection of the pre-corroded steel reinforcement in reinforced concrete (RC) columns using an externally bonded carbon fibre reinforced polymer (CFRP) wrap. Active protection is a novel technique used to impede corrosion achieved by employing the CFRP wrap as the anode of the impressed current cathodic protection (ICCP). Passive protection denotes the anti-corrosion behaviour of the CFRP fabric. Nine reinforced concrete columns with different degrees of corrosion (theoretical mass losses of 1%, 3%, and 6%) were prepared and then treated with different protection methods (non-protection, passive protection, and active protection) by exposing them to wetedry cycles. By measuring the steel potential, linear polarization, and electrochemical impedance spectroscopy (EIS) of all investigated specimens, the efficiency of active protection was found to be closely related to the degree of the pre-corrosion of the protected specimens. Furthermore, the efficiency of active protection decreased with time, which may be attributed to the deterioration of the CFRP anode and CFRP/ concrete interface. Passive protection was proven to be effective in every case, however, it can only slow down the corrosion process but cannot stop the elicited corrosion response. (C) 2018 Elsevier Ltd. All rights reserved.