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。
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.
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