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On-site determination of corrosion rate in reinforced concrete structures by use of galvanostatic pulse
Galvanostatically induced potential transients can be used to determine the corrosion rate and double layer capacitance (C) of steel in reinforced concrete structures, provided that the steel surface area involved in the measurements is known. An approximate capacitance value, based on previous experience, can also be used to determine polarisation resistance even if the area of the working electrode (WE) is unknown, as in the case of measurements on life-size structures using small counter electrodes. In the case of small specimens, in which direct determination of C is possible, the reliability of the pulse technique is comparable to that of other widely accepted electrochemical procedures. In the case of life-size structures, its reliability is lower due to the need to use estimated values of C. The results indicate that neither the magnitude of the perturbing pulse nor the lack of uniformity of the polarisation on the WE are factors that significantly prejudice application of the current pulse technique in on-site measurements on large reinforced concrete structures.
On-site determination of corrosion rate in reinforced concrete structures by use of galvanostatic pulse
Galvanostatically induced potential transients can be used to determine the corrosion rate and double layer capacitance (C) of steel in reinforced concrete structures, provided that the steel surface area involved in the measurements is known. An approximate capacitance value, based on previous experience, can also be used to determine polarisation resistance even if the area of the working electrode (WE) is unknown, as in the case of measurements on life-size structures using small counter electrodes. In the case of small specimens, in which direct determination of C is possible, the reliability of the pulse technique is comparable to that of other widely accepted electrochemical procedures. In the case of life-size structures, its reliability is lower due to the need to use estimated values of C. The results indicate that neither the magnitude of the perturbing pulse nor the lack of uniformity of the polarisation on the WE are factors that significantly prejudice application of the current pulse technique in on-site measurements on large reinforced concrete structures.
On-site determination of corrosion rate in reinforced concrete structures by use of galvanostatic pulse
Örtliche Bestimmung der Korrosionsgeschwindigkeit an Stahlbeton-Konstruktionen unter Anwendung galvanostatischer Impulse
Gonzales, J.A. (author) / Cobob, A. (author) / Gonzales, M.N. (author) / Feliu, S. (author)
Corrosion Science ; 43 ; 611-625
2001
15 Seiten, 6 Bilder, 4 Tabellen, 33 Quellen
Article (Journal)
English
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