Linear Polarisation Resistance (LPR) can provide a direct evaluation of the instantaneous rate of corrosion. However it has the disadvantage of requiring a localised breakout of the concrete cover to provide an electrical connection to the steel reinforcement. This paper describes an adaptation of the LPR method and the four-point Wenner resistivity method to give an evaluation of the rate of steel corrosion without the requirement for a direct electrical connection to the steel reinforcement. Resume La Resistance par Polarisation Lineaire (LPR) peut fournir une evaluation directe du taux instantane de corrosion. Cependant, elle a l'inconvenient de necessiter une breche localisee de la couverture du beton pour fournir une connexion electrique au renfort d'acier. Ce papier decrit une adaptation de la methode LPR et de la methode de resistivite Wenner a quatre points pour evaluer le taux de corrosion de l'acier sans besoin d’une connexion electrique directe au renfort d'acier.
[1]
Michael Grantham,et al.
THE USE OF LINEAR POLARISATION CORROSION RATE MEASUREMENTS IN AIDING REHABILITATION OPTIONS FOR THE DECK SLABS OF A REINFORCED CONCRETE UNDERGROUND CAR PARK
,
1997
.
[2]
F. Wenner.
A method for measuring earth resistivity
,
1915
.
[3]
Steve Millard.
Institute of Corrosion/Concrete Society: Good Practice Guide N0.128
,
2002
.
[4]
Steve Millard,et al.
Measurement of concrete resistivity for assessment of corrosion severity of steel using wenner technique
,
1999
.
[5]
John Broomfield,et al.
Measuring the corrosion rate of reinforced concrete using linear polarisation resistance
,
2003
.
[6]
Carmen Andrade,et al.
Corrosion rate monitoring in the laboratory and on-site
,
1996
.