Corrosion behavior of a steel bar embedded in a cement-based conductive composite
Corrosion behavior of a steel bar embedded in a cement-based conductive composite
复制标题
嵌入水泥基导电复合材料中的钢筋的腐蚀行为
DOI：
10.1016/j.conbuildmat.2016.12.087
复制
发表时间：
2017
影响因子：
7.4
通讯作者：
He Zheng
中科院分区：
文献类型：
--
作者：
Qiao Guofu;Guo Bingbing;Li Zuohua;Ou Jinping;He Zheng
本文的研究对象是嵌入水泥基导电复合材料中的钢筋的腐蚀行为。首先，获得了碳纤维（CF-）增强水泥基复合材料的电导率渗流曲线。然后采用干湿循环方法加速嵌入水泥基导电复合材料中的钢筋的腐蚀。使用线性极化电阻（LPR）技术、腐蚀电位和失重法分析腐蚀行为。此外，还讨论了CF的添加对孔结构的影响。最后发现复合材料中CF的渗流阈值是决定钢筋腐蚀程度的临界值。当CF含量低于CF渗流阈值时，CF的添加对钢筋早期腐蚀水平没有影响，而当CF含量高于CF渗流阈值时，腐蚀水平趋于增加。
Corrosion behavior of a steel bar embedded in a cement-based conductive composite was the object of study described in this paper. First, the conductivity percolation curve of a carbon-fiber- (CF-) reinforced cement-based composite was obtained. The dry-wet cycle method was then adopted to accelerate the corrosion of the steel bar embedded in the cement-based conductive composite. The corrosion behavior was analyzed using the linear polarization resistance (LPR) technique, the corrosion potential and the weight loss method. In addition, the effect of the CF added on the pore structure was discussed. Finally, it was found that the percolation threshold of CF in the composite is a critical value that determines the corrosion level of the steel bar. The addition of CF has no effect on the corrosion level of the steel bar at the early stage when the CF content is lower than the CF percolation threshold, while the corrosion level tends to increase when the CF content is higher than the CF percolation threshold.