On the current density required to protect steel in atmospherically exposed concrete structures

Mixed potential theory suggests that the current required to cathodically protect steel in atmospherically exposed concrete is strongly dependent on the corrosion rate. At modest corrosion rates, typical design current densities would not achieve the level of cathodic polarisation required by common...

Full description

Saved in:
Bibliographic Details
Published in:Corrosion science 1995-10, Vol.37 (10), p.1643-1646
Main Authors: Glass, G.K., Buenfeld, N.R.
Format: Article
Language:English
Subjects:
Applied sciences
Corrosion
Corrosion prevention
Exact sciences and technology
Metals. Metallurgy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Mixed potential theory suggests that the current required to cathodically protect steel in atmospherically exposed concrete is strongly dependent on the corrosion rate. At modest corrosion rates, typical design current densities would not achieve the level of cathodic polarisation required by commonly accepted protection criteria. However a cathodic current effectively lowers the unprotected corrosion rate by removing chloride ions and increasing the pH at the cathode. This work suggests that the prevention of further corrosion and the achievement of an adequate level of polarisation by a cathodic protection system is strongly dependent on these protective effects.
ISSN:0010-938X
1879-0496
DOI:10.1016/0010-938X(95)00116-2