Cl<sup>-</sup>浓度渐变的混凝土孔隙液中钢筋的腐蚀过程

中国腐蚀与防护学报

2013, Vol. 33

Issue (4): 331-338

研究报告

本期目录 | 过刊浏览

Cl^-浓度渐变的混凝土孔隙液中钢筋的腐蚀过程

杜雅莉张俊喜蒋俊原徐杰王灵芝马行驰

上海电力学院上海高校电厂腐蚀防护与应用电化学重点实验室上海 200090

Corrosion Behavior of Reinforced Steel in Simulated Pore Solution with Gradual Augment of Cl^-

DU Yali, ZHANG Junxi, JIANG Jun, YUAN Xujie, WANG Lingzhi, MA Xingchi

Key Laboratory of Shanghai Colleges and Universities for Electric Power Corrosion Control and Applied Electrochemistry, Shanghai University of Electric Power, Shanghai 200090, China

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摘要: 采用EIS和线性极化曲线技术研究了供货状态和打磨后的钢筋样品在模拟孔隙液中Cl^-浓度渐变条件下的腐蚀行为。采用SEM结合EDS和XRD对钢筋表面形貌和组成结构进行了分析。结果表明：在Cl^-浓度逐渐增加的孔隙液中，钢筋表面的电化学行为基本可分为3个过程，即钝化膜形成或修复过程、Cl^-侵蚀过程和Ca沉积过程。供货状态钢筋比打磨后的钢筋样品更容易发生腐蚀。结合电极的腐蚀电位、腐蚀电流和电化学阻抗等参数随Cl^-浓度的变化，讨论了混凝土中钢筋腐蚀发生、发展各阶段的腐蚀电化学过程的变化规律。

关键词 ：混凝土, Cl^-, 锈蚀, 钢筋, 电化学测试

Abstract：The corrosion behavior of reinforced steel with different surface states in simulated pore solution with gradual augment of Cl^- was investigated by using electrochemical measurements, scanning electron microscopy with energy dispersive SEM/EDS and XRD. The variation of corrosion potential and corrosion current density of the reinforced steel with corrosion time was obtained, and the morphology and structure of corrosion products formed on the sample were analyzed. The results showed that the reinforced steel with different surfaces state had different corrosion characterizations; the corrosion process of reinforced steel might include three steps, i.e., the formation of passive film, the aggression of Cl^- and the calcium deposition. It is more easy to happen corrosion for reinforced steel with oxide layer.

Key words： concrete Cl^- corrosion reinforced steel electrochemical measurement

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引用本文:

杜雅莉, 张俊喜, 蒋俊, 原徐杰, 王灵芝, 马行驰. Cl^-浓度渐变的混凝土孔隙液中钢筋的腐蚀过程[J]. 中国腐蚀与防护学报, 2013, 33(4): 331-338.
DU Yali, ZHANG Junxi, JIANG Jun, YUAN Xujie, WANG Lingzhi, MA Xingchi. Corrosion Behavior of Reinforced Steel in Simulated Pore Solution with Gradual Augment of Cl^-. Journal of Chinese Society for Corrosion and protection, 2013, 33(4): 331-338.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2013/V33/I4/331

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