Corrosion of Steel in Concrete – Potential Monitoring and Electrochemical Impedance Spectroscopy.pdf

文档介绍：Küter, A., Mason, ., Møller, P., Geiker, ., “Corrosion of Steel in Concrete – Potential Monitoring and
Electrochemical Impedance Spectroscopy during Corrosion Initiation and Propagation”, Proceedings of Eurocorr 2005,
Lisbon, Portugal, September 4-8, 2005
Corrosion of Steel in Concrete – Potential Monitoring and Electrochemical
Impedance Spectroscopy during Corrosion Initiation and Propagation


André Kütera,*, Thomas O. Masonb, Per Møllerc, Mette R. Geikerd

a,d Dept. of Civil Engineering (BYG•DTU), Technical University of Denmark,
Brovej, Building 118, 2800 Lyngby, Denmark
a Tel.: [phone], Fax: [phone], E-mail: ******@
d Tel.: [phone], Fax: [phone], E-mail: ******@

b Dept. of Materials Science and Engineering, Northwestern University,
2220 Campus Drive Evanston, IL 60208, USA
Tel.: [phone], Fax: [phone], E-mail: t-******@

c Inst. of Manufacturing Engineering and Management (IPL), Technical University
of Denmark, Produktionstorvet, Building 204, 2800 Lyngby, Denmark
Tel: [phone], Fax: [phone], E-mail: ******@


Abstract
A reinforced mortar specimen that allows potential measurements and electrochemical
impedance spectroscopy (EIS) immediately after preparation was designed and tested. The
specimen consists of a mortar cylinder with a central rebar and a concentric arrangement of
embedded Ru/Ir activated titanium wires. The wires can act as both reference and counter
electrode during EIS and, thus, no external electrode is required. The defined geometry solves
reproducibility problems involved with application of an external reference electrode for EIS.
Changes of the electromotive force (EMF) between rebar and titanium wires can be monitored
immediately after preparation. The wire arrangement also allows investigation of local
changes in the bulk mortar by EIS or by measuring the potential devel