Results of galvanostatic pulse transient response experiments were reported to determine the corrosion parameters associated with passive and actively corroding reinforcing steel in concrete. Galvanostatic pulse measurements were conducted on a number of short sections of steel-reinforcing bar embedded in concrete. The duration of the applied galvanostatic pulse varied from 45 s to 600 s. The bars displayed a range of corrosion rates, from passive steel to highly active corrosion. Analysis of the galvanostatic pulse transient enabled separate components, which made up the measured transient, to be isolated. These components displayed a range of resistances and associated capacitances, dependent upon the corrosion state of the reinforcing steel, which may be attributed to the corrosion process or other effects within the bulk concrete. The corrosion rate was calculated from the summation of the separate resistive components and compared with the corrosion rate determined from linear polarization resistance (LPR) measurements on the same specimens. Results from the galvanostatic pulse transient analysis showed that significant errors in evaluating corrosion rates using the LPR method may be incurred if the usual 30-s equilibrium period was used for measuring actively corroding steel bars.
Skip Nav Destination
Article navigation
1 January 2000
Research Article|
January 01 2000
Galvanostatic Pulse Measurements of Passive and Active Reinforcing Steel in Concrete Available to Purchase
D.W. Law;
D.W. Law
fn1-1_3280522
*Department of Civil Engineering, Liverpool University, Liverpool,
UK
.
Search for other works by this author on:
J.H. Bungey
J.H. Bungey
**Department of Civil Engineering, Liverpool University, Liverpool,
UK
.
Search for other works by this author on:
Present address: Colton Testing Consultants.
Online ISSN: 1938-159X
Print ISSN: 0010-9312
NACE International
2000
CORROSION (2000) 56 (1): 48–56.
Citation
D.W. Law, S.G. Millard, J.H. Bungey; Galvanostatic Pulse Measurements of Passive and Active Reinforcing Steel in Concrete. CORROSION 1 January 2000; 56 (1): 48–56. https://doi.org/10.5006/1.3280522
Download citation file: