Electrochemical
Devices, Inc. Products
Electrochemical
Devices, Inc. manufactures reference electrodes, impressed current
anodes and constant current rectifiers which are used for corrosion
prevention by the cathodic protection process.
To see an overview of our product line, click on Product
Line Guide.
Products designed for concrete applications comprise our C Series.
These include embedded reference electrodes for measuring the potential
of the rebars, several types of probes which are used for corrosion
monitoring and potential wells which are used to make accurate potential
measurements with a portable reference electrode.
EDI also designs and manufactures custom corrosion monitoring and
prevention products for use in reinforced concrete. Click on the
C Series Selection Guide
for a further description of these products. |
Featured
Product: Potential Wells
Potential wells are inexpensive devices embedded into the concrete
surface. They create a low resistance pathway to the interior of
the concrete structure. Measurements made with portable reference
electrodes placed in potential wells are more accurate than those
made with the reference electrode resting directly on the concrete
surface. In addition, the use of potential wells ensures that a
series of measurements will always be made at the exact same location.
This will increase the accuracy of the measurements. To learn more
about potential wells, click on the data
sheet.
The most accurate potential measurements in reinforced concrete
are made using embedded reference electrodes placed close to a rebar.
Since it may be economically prohibitive to thoroughly instrument
a reinforced concrete structure with embedded reference electrodes,
it is a common practice to make potential measurements using a portable
reference electrode placed at various locations around the concrete
surface. Such measurements can be subject to several possible sources
of error:
-
If a sealer or membrane has been placed on the concrete surface,
potential measurements will not be possible because the surface
concrete is non-conductive.
-
If the concrete surface has become carbonated or has dried out, potential measurements may be in error due to the high resistance surface layer.
-
The potential of a rebar can vary greatly along its length. When a series of potential measurements are made over time, observed variations may be due to making readings at different locations rather than an actual change in the corrosion potential of the rebar.
Use of potential wells can eliminate these problems. They provide a simple solution to the problem of obtaining accurate potential measurements with portable reference electrodes in reinforced concrete.
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