Critical polarization resistance in service life determination
- 作者：Khatri ; R.P. ; Sirivivatnanon ; V. ; Heeley ; P.
- 关键词：Corrosion ; Electrochemical properties ; Polarization resistance ; Service life ; Long-term performance
- 刊名：Cement and Concrete Research
- 出版年：2004
- 期刊代码：12_00088846
- 类别：ms
- 出版时间：May, 2004
- 卷：34
- 期：5
- 页码：829-837
- 文件大小：1.04 M
摘要
The service life of concrete exposed to chloride environments was measured experimentally, and polarization resistance and half-cell potential values were used to monitor corrosion. Service life was considered as the combination of the initiation phase and a part of the propagation phase in which the degree of corrosion is lower than an “tolerable” degree of corrosion. Polarization resistance corresponding to this tolerable degree of corrosion was termed the “critical polarization resistance,” or CPR. Subsequently, CPR was used to establish the service life of four grades of concretes prepared from four cements; the influence of the type of cement was also studied. Polarization resistance was found to be a much more useful and reliable technique in service life evaluation than the half-cell potential.