恒流脉冲技术检测混凝土中钢筋的腐蚀

中国腐蚀与防护学报

2010, Vol. 30

Issue (3): 181-186

研究报告

本期目录 | 过刊浏览

恒流脉冲技术检测混凝土中钢筋的腐蚀

徐晶,姚武

同济大学先进土木工程材料教育部重点实验室上海 200092

CORROSION DETECTION OF STEEL IN CONCRETE BY USE OF GALVANOSTATIC PULSE TECHNIQUE

XU Jing, YAO Wu

Key Labratory of Advance Civil Engineering Materials of the Ministry of Education, Tongji University, Shanghai 200092

全文: PDF(773 KB)

摘要:

采用恒流脉冲法研究了混凝土结构中的钢筋在不同Cl^-含量下的腐蚀行为。运用两种数据处理手段分别分析了脉冲响应曲线，计算得到的腐蚀速率值与传统线性极化法进行了对比。结果表明，扰动信号强度的选择强烈依赖于钢筋的腐蚀状况，过低会造成背景噪声干扰，而过高则会引起钢筋强烈极化，两者均不利于后期数据处理。阳极电流换算法能快速有效地分析脉冲信号曲线，但在过大的脉冲电流情况下有其局限性。

关键词 ：钢筋混凝土, 腐蚀速率, 恒流脉冲

Abstract：

Corrosion behavior of steel in concrete with different chloride ion concentration was studied by means of galvanostatic pulse, which is introduced as a new type of non-destructive technique nowadays. Potential transient technique galvanostatically induced is used to determine the corrosion rate with two data analysis methods, followed by comparing to that of the traditional linear polarization method. It is shown that the choice of perturbation magnitude of signal to be applied depends strongly on the corrosion state of steel. Too small current makes it difficult to separate the potential signal from background noise, whereas higher current results in intensive polarization. Thus, neither of two is beneficial for the data processing. Anodic current conversion method is fast and efficient in analyzing the galvanostatic pulse curves; however, this approach has some limitations in case of large applied current.

Key words： steel reinforced concrete corrosion rate galvanostatic pulse

收稿日期: 2008-06-27

ZTFLH:

TU201

基金资助:

国家教育部博士点基金项目20070247063资助

通讯作者: 徐晶 E-mail: 0420060017@smail.tongji.edu.cn

Corresponding author: XU Jing E-mail: 0420060017@smail.tongji.edu.cn

作者简介: 徐晶，男，1984年生，博士生，研究方向为钢筋混凝土腐蚀与防护

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引用本文:

徐晶,姚武. 恒流脉冲技术检测混凝土中钢筋的腐蚀[J]. 中国腐蚀与防护学报, 2010, 30(3): 181-186.
XU Jing, YAO Wu. CORROSION DETECTION OF STEEL IN CONCRETE BY USE OF GALVANOSTATIC PULSE TECHNIQUE. J Chin Soc Corr Pro, 2010, 30(3): 181-186.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2010/V30/I3/181

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