Electrode potential measurements of concrete reinforcement for corrosion evaluation
- U.P.S. Complexe scientifique de Rangueil, Toulouse (France). Lab. Materiaux et Durabilite des Constructions
This article deals with the correlation between active corrosion of steel in concrete and electrode potential measurements obtained by both classical method and bi-electrode method. In a first part, this paper deals with a relative value interpretation method which leaves aside the degree of ambient hygrometry and the moisture of concrete. This relative value interpretation exhibits a good correlation between the corroded areas of concrete reinforcing rebars extracted from laboratory beams and the potential measurement. In a second part, this paper deals with an improved potential measurement using two reference electrodes. Two kinds of bi-electrode device are presented. In the first place, one reference electrode is fixed and takes the place of the electrical connection to reinforcement. Secondly, the two reference electrodes are moving simultaneously. With the relative value method, it is possible to make direct use of the values measured with both types of bi-electrode device. The results presented show a good correlation between potential measurement obtained by bi-electrode devices and corrosion of rebars.
- OSTI ID:
- 7037548
- Journal Information:
- Cement and Concrete Research; (United States), Journal Name: Cement and Concrete Research; (United States) Vol. 24:3; ISSN 0008-8846; ISSN CCNRAI
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360105* -- Metals & Alloys-- Corrosion & Erosion
360604 -- Materials-- Corrosion
Erosion
& Degradation
ALLOYS
BUILDING MATERIALS
CHEMICAL REACTIONS
CHEMISTRY
COMPOSITE MATERIALS
CONCRETES
CORROSION
ELECTRIC POTENTIAL
ELECTROCHEMISTRY
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MEASURING METHODS
REINFORCED CONCRETE
REINFORCED MATERIALS
STEELS