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首页> 外文会议>International Workshop On Measurement and Interpretation of the On-site Corrosion Rate MESINA Feb 22-23, 1999, Madrid, Spain >RELIABILITY OF CORROSION RATE MEASUREMENTS BY LINEAR POLARIZATION
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RELIABILITY OF CORROSION RATE MEASUREMENTS BY LINEAR POLARIZATION

机译：线性极化测量腐蚀速率的可靠性

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摘要

The purpose of the research was to study the reliability of corrosion rate measurements by linear polarization. Other electrochemical measurements such as corrosion potential and concrete resistivity were also studied. The measurement device used was Gecor6 /1/. Six reinforced concrete test slabs were prepared in the laboratory. Corrosion of the reinforcement was initiated by adding chloride to the concrete mix. The slabs were stored in conditioned climate rooms. The rate of corrosion, corrosion potential and concrete resistivity were monitored by periodical measurements of the slabs over 420 days. The scatter of the measurement results was studied. To determine the real rate of corrosion some of the concrete slabs were broken after the measurement period. The steel reinforcement was exposed and the amount of corrosion was evaluated both visually and by the gravimetric method. The observed amount of corrosion was compared with the theoretical amount of corrosion calculated on the basis of corrosion rate measurements. The depths of corrosion determined by the gravimetric method and the electrochemical method correlate well with each other. However, the depth of corrosion based on the gravimetric method was on an average six times greater than that based on corrosion rate measurements. The reason for this is not fully known to the author. It seems that of all the measurement results, those that indicate the maximum values of corrosion rate are nearest to the correct level and some of the measurement results show too low a rate of Corrosion, Thus a single measurement may not be adequate to obtain a reliable value of corrosion rate.
机译：该研究的目的是研究通过线性极化测量腐蚀速率的可靠性。还研究了其他电化学测量方法，例如腐蚀电位和混凝土电阻率。使用的测量设备是Gecor6 / 1 /。在实验室中准备了六块钢筋混凝土测试板。通过将氯化物添加到混凝土混合物中来引发钢筋腐蚀。这些板被存储在有条件的气候室中。通过在420天之内定期测量这些板来监测腐蚀速率，腐蚀电位和混凝土电阻率。研究了测量结果的分散性。为了确定实际的腐蚀速率，在测量期后将一些混凝土板破坏。露出钢筋，并通过目测和重量分析法评估腐蚀量。将观察到的腐蚀量与根据腐蚀速率测量结果计算出的理论腐蚀量进行比较。通过重量法和电化学法确定的腐蚀深度相互关联良好。但是，基于重量法的腐蚀深度平均要比基于腐蚀速率测量的腐蚀深度平均大六倍。作者尚不完全了解其原因。似乎在所有测量结果中，那些表示腐蚀速率最大值的测量结果都最接近正确的水平，并且某些测量结果显示腐蚀速率太低，因此，单次测量可能不足以获得可靠的结果。腐蚀速率值。

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