ISSN: 1546-962X
Published Online: 15 May 2008
Page Count: 9

Comparison of Measurements Provided by Several Corrosion Rate Meters with Modulated Confinement of the Current

Martinez, I.
Institute of Construction Science, Madrid,

Andrade, C.
Institute of Construction Science, Madrid,

Marie-Victoire, E.
Institut de Restauration, Paris,

Bouteiller, V.
Laboratoire Central des Ponts et Chaussées, Paris,

Rebolledo, N.
Institute of Construction Science, Madrid,

(Received 23 July 2007; accepted 31 March 2008)

Abstract

The main difficulty for the application of R_p on site is the vanishing of the current with the distance which has been overcome with the use of a modulated confinement of the current only feasible if the guard ring is monitored during the measurement by means of electrodes able to detect the distance reached by the current.

In the present paper after a short review of existing corrosion rate meters to measure on site, results of a comparison made of reinforced concrete slabs with various degradations such as carbonation or chloride among several using a guard ring with modulated confinement of the current is presented in order to have a reproducibility and repeatability for the measurements. Results show a good correlation among all the methods used for the corrosion rate evaluation.

Keywords:
corrosion, concrete, electrochemical techniques

Paper ID: JAI101337
DOI: 10.1520/JAI101337
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