• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Electrochemical Science >Continuous Monitoring of Steel Corrosion Condition in Concrete Under Drying/Wetting Exposure to Chloride Solution by Embedded MnO2 Sensor
【24h】

Continuous Monitoring of Steel Corrosion Condition in Concrete Under Drying/Wetting Exposure to Chloride Solution by Embedded MnO2 Sensor

机译：嵌入式MnO 2 传感器连续监测氯化物溶液干湿接触下混凝土的钢腐蚀状况。

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Corrosion condition of steel in concrete under drying/wetting exposure to chloride ion solution was monitored based on various electrochemical techniques including linear polarization (LP), electrochemical impedance spectra (EIS) and half-cell potential (HCP) through embedded MnO2 reference electrode. In LP measurement, polarization resistance of steel was equal to the slope of curves. However, in EIS measurement, polarization resistance of steel was calculated by adding the resistance of protective film to the charge transfer resistance derived from EIS data by means of the equilibrium circuit model. Corrosion state of steel was differentiated based on the obtained corrosion current density calculated by the polarization resistance according to the Stern-Geary equation by introducing the ″divergent region″. Furthermore, potential of steel with respect to embedded MnO2 reference electrode was higher than -0.400 V, -0.400 to -0.516 V, -0.516 to -0.710 V and lower than - 0.710 V for passive state, critical corrosion state, moderate corrosion rate state and high corrosion rate state respectively. Continuous non-destructive monitoring corrosion condition of steel in concrete was achieved through embedded MnO2 reference electrode via electrochemical techniques.
机译：基于各种电化学技术，包括通过嵌入的MnO2参比电极的线性极化（LP），电化学阻抗谱（EIS）和半电池电位（HCP），监测了混凝土在干燥/湿润暴露于氯离子溶液下后钢中的腐蚀状况。在LP测量中，钢的极化电阻等于曲线的斜率。然而，在EIS测量中，通过平衡电路模型，通过将保护膜的电阻与从EIS数据得出的电荷转移电阻相加来计算钢的极化电阻。根据Stern-Geary方程，通过引入“发散区”，根据极化电阻计算得到的腐蚀电流密度，可以区分钢的腐蚀状态。此外，对于被动状态，临界腐蚀状态，中等腐蚀速率状态，钢相对于嵌入式MnO2参比电极的电势高于-0.400 V，-0.400至-0.516 V，-0.516至-0.710 V且低于-0.710 V和高腐蚀速率状态。通过嵌入的MnO2参比电极，通过电化学技术实现了对混凝土中钢的连续无损监测。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号