Corrosion monitoring of reinforcing steel in cement mortar by EIS and ENA
Corrosion monitoring of reinforcing steel in cement mortar by EIS and ENA
复制标题
利用 EIS 和 ENA 监测水泥砂浆中钢筋的腐蚀
DOI：
10.1016/j.electacta.2007.06.070
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发表时间：
2007-11-01
影响因子：
6.6
通讯作者：
Ou, Jinping
中科院分区：
文献类型：
--
作者：
Qiao, Guofu;Ou, Jinping
在土木工程中，尤其是在恶劣的环境中，钢材的腐蚀是一个长期存在的问题。环境污染和全球变暖将加剧这一问题。结构全寿命费用评估和剩余使用寿命预测具有重要意义。孔蚀是影响钢筋混凝土结构在多种氯离子环境中使用寿命的重要因素。采用电化学阻抗谱（EIS）方法研究了钢筋在水泥砂浆中的腐蚀过程。实验结果表明，水泥砂浆中碳钢腐蚀的电化学过程受分散和扩散效应控制。通过对计算结果进行EC拟合，计算出CPE和瓦尔堡阻抗的相关参数。采用电化学噪声分析（ENA）方法研究了钢筋在水泥砂浆中的点蚀行为，利用小波变换对砂浆中钢筋的电化学噪声数据进行了分析，并绘制了能量分布图（EDP）。实验结果表明，EDP在腐蚀过程中的变化可以定性地揭示腐蚀机理。(C)2007爱思唯尔有限公司保留所有权利。
Health degradation by corrosion of steel in civil engineering, especially in rough environment, is a persistent problem. Environment pollution and global warming will exacerbate this problem. The assessment of whole-life costing and residual service life prediction of structures is very important. Pitting corrosion is the most important factor which influences the service life of the reinforced concrete structures in many chloride included environments. Electrochemical impedance spectroscopy (EIS) method is used to study the corrosion process of reinforcing steel in cement mortar. According to the results of the experiments, dispersion and diffusing effect control the electrochemical process of carbon steel corrosion in the cement mortar. By fitting the results with EC, the parameters about CPE and Warburg impedance are calculated. The pitting corrosion behavior of reinforcing steel in cement mortar has been studied by electrochemical noise analysis (ENA) method, the wavelet transform has been employed to analyze the EN data of reinforcing steel in mortar, and the energy distribution plot (EDP) is plotted. The experimental results show that the change of EDP during the corrosion process can qualitatively reveal useful information on corrosion mechanisms. (C) 2007 Elsevier Ltd. All rights reserved.