Possibilities and problems of in situ techniques for measuring steel corrosion rates in large reinforced concrete structures
Possibilities and problems of in situ techniques for measuring steel corrosion rates in large reinforced concrete structures
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DOI：
10.1016/j.corsci.2004.04.011
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发表时间：
2005
影响因子：
8.3
通讯作者：
S. Feliu;Josefa González;J. M. Miranda;V. Feliu
中科院分区：
文献类型：
--
作者：
S. Feliu;Josefa González;J. M. Miranda;V. Feliu
大型钢筋混凝土结构中钢筋腐蚀速率的现场测量面临着不同类型的困难。本文讨论了与确定极化电阻的真实值有关的一些问题，（i）与腐蚀过程相关的时间常数值，以及（ii）使用保护环将电信号限制在一定的钢筋区域。在（i）中，结果证实了时间常数与受电信号影响的区域无关的假设，尽管有一些例外。在（ii）中，示出了实现从保护环和反电极流动的电流强度之间的临界比率的非常重要性。
In situ measurements of steel corrosion rate in large reinforced concrete structures face difficulties of different types. The paper discusses some of the problems connected with the determination of the true value of the polarisation resistance from (i) the time constant value associated with the corrosion process, and (ii) the use of a guard ring for confining the electrical signal to a definite reinforcement area. In (i), results corroborate the assumption of a time constant value independent of the area affected by the electrical signal, albeit with some exceptions. In (ii), it is shown the great importance of achieving a critical ratio between the current intensities that flow from the guard ring and counter-electrode.