The effect of a tailored electro‐migrating corrosion inhibitor on the corrosion performance of chloride‐contaminated reinforced concrete
The effect of a tailored electro‐migrating corrosion inhibitor on the corrosion performance of chloride‐contaminated reinforced concrete
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DOI：
10.1002/maco.201508231
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发表时间：
2015-10
期刊：
影响因子：
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通讯作者：
F.‐L. Fei;J. Hu;Qian Yu;J. Wei;Y.-B. Nong
中科院分区：
文献类型：
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作者：
F.‐L. Fei;J. Hu;Qian Yu;J. Wei;Y.-B. Nong
采用电化学测试和表面分析方法，研究了电化学注入咪唑啉季铵盐（IQS）缓蚀剂对氯离子污染钢筋混凝土的腐蚀性能。XPS测试表明，ECI处理不仅加快了IQS缓蚀剂在混凝土中的迁移速度，而且有效地将氯离子从混凝土中提取出来，有利于防止钢筋的腐蚀萌生;此外，电流密度越大，IQS缓蚀剂的迁移速度越快。电化学测试结果表明，电化学腐蚀处理显著提高了钢筋的耐腐蚀性能。对钢筋表面的观察表明，电化学腐蚀处理后钢筋表面形成的腐蚀产物较少。并探讨了电化学注入IQS对埋置钢筋的缓蚀机理。
In this paper, the corrosion performance of chloride‐contaminated reinforced concrete in the presence of the electrochemically injected (ECI) imidazoline quaternary ammonium salt (IQS) corrosion inhibitor was investigated, by using electrochemical measurements and surface analysis. The XPS tests showed that ECI treatment not only accelerated the migration rate of IQS corrosion inhibitor in concrete, but also effectively extracted Cl‐ ions out of concrete, which is beneficial for preventing the corrosion initiation of the reinforcement; further, a larger current density was related to a faster migration rate of IQS corrosion inhibitor. The electrochemical measurements indicated that the ECI treatment significantly increased the corrosion resistance of the reinforcement. The surface observation of the reinforcement revealed that a less amount of corrosion products formed on the reinforcement surface for specimens with the ECI treatment. The related corrosion inhibition mechanisms of the electrochemically injected IQS to embedded reinforcement were also discussed.