Title:
Confinement of the Electrical Signal for in Situ Measurement of Polarization Resistance in Reinforced Concrete
Author(s):
S. Feliu, J. A. Gonzalez, S. feliu, Jr., and M. C. Andrade
Publication:
Materials Journal
Volume:
87
Issue:
5
Appears on pages(s):
457-460
Keywords:
corrosion; electric measuring instruments; measurement; polarization; reinforced concrete; reinforcing steels; Materials Research
DOI:
10.14359/1830
Date:
9/1/1990
Abstract:
Proposes a galvanostatic method for on-site determination of the polarization resistance of reinforcing steel in large reinforced concrete structures and subsequent estimation of corrosion rates using theStern-Geary equation. The method uses two counterelectrodes to apply the electrical signal (polarization) to the reinforcement. The current applied from the external counterelectrode (guard ring) tends to repel the lines of current from the central counterelectrode, confining them to an area of the structure located approximately under this last electrode. The method is noteworthy for its use of a pair of sensors to bound the field of action of the signal coming from the central counterelectrode. The results obtained confirm the interesting possibilities of the method proposed.