Influence of Electrochemical and Physical Characteristics of Reinforced Concrete on the Design of Cathodic Protection
Engineering and Technology Journal,
2008, Volume 26, Issue 6, Pages 273-285
AbstractThe design aspect of cathodic protection of steel reinforcement embedded in
concrete; still implies a great deal of uncertainties, assumptions and specifications.
Important features, such as design criteria, current distribution, and others are, as yet
The main aim of this research is to study relationship between the induced level
of polarization and the area of the embedded steel, area of anode, the distance between
the cathode and anode and the level of applied external voltage. The experimental
program included preparing 12 reinforced concrete specimens with dimensions 20 x 30 x
60 cm. The specimens were partially submerged in 3.5% sodium chloride solution.
Various electrochemical and electrical measurement were carried out on polarized the
specimen using different external voltages.
The results indicate differential moisture content within each specimen has
produced different potentials along the steel bars. Greater polarization has always been
associated with the submerged portion of the specimen.
The results show that to achieve efficient design, the protected area should be
divided into discrete electrochemical zones depending on the concrete resistance and
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