Corrosion rate monitoring of deteriorated and repaired structures through on-site linear polarization measurements using surface or embedded sensors

Title: Corrosion rate monitoring of deteriorated and repaired structures through on-site linear polarization measurements using surface or embedded sensors
Author(s): C. Andrade, I. Martinez
Paper category : conference
Book title: 2nd International RILEM Symposium on Advances in Concrete through Science and Engineering
Editor(s): J. Marchand, B. Bissonnette, R. Gagné, M. Jolin and F. Paradis
Print-ISBN: 2-35158-003-6
e-ISBN: 2351580028
Publisher: RILEM Publications SARL
Publication year: 2006
Nb references: 10
Language: English

Abstract: Reinforcement corrosion is being measured by means of different techniques that mainly are: corrosion potential, resistivity, galvanic current and polarisation resistance. In general, due to the difficulty to measure quasi-infinite in size reinforcement, the measurements are made on probes embedded in the cover attached to the bars. From the techniques used, only linear polarisation is quantitative. Corrosion potential provides information about the corrosion risk, and resistivity is directly related with the concrete water content. The galvanic current is misleading if real size of anode and cathode are unknown. Although, frequently mistaken, galvanic current is not equal to corrosion rate and reference to areas involved is needed. In the paper, corrosion results of several real structures measured in Spain are given.

Keywords: Electrochemical techniques, on-site values, linear polarization, corrosion rate.

Online publication: 2006-08-02
Classification: 3.1 Theme 1: Numerical Models: from Microstructure to Transport Properties and Durability
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580028.016