Advanced System for corrosion potential
data acquisition and
analysis, allowing the user to quickly identify areas of
probable corrosion in the field.
Ruggedized Electronics allows rapid
analysis of data in the field or office.
Conforms to ASTM C--876 Standard Method
of Half-Cell Potential of uncoated reinforcing steel in concrete.
Electrode is designed for use on
horizontal, vertical and inverted positions.
Temperature and humidity sensors
facilitate inclusion of environmental conditions in data analysis.
Advanced System for corrosion potential data acquisition and
analysis, allowing the user to quickly identify areas of probable
corrosion in the field.
For steel reinforcing bars in
concrete, corrosion is an exchange of ions from the steel to the
This chemical exchange of ions produces
It also produces areas of concrete where
there is a larger concentration of negative ions due to the corrosion
process of the steel reinforcing bar than areas where there is no
corrosion. This larger concentration of ions creates a small electric
voltage potential. By measuring and mapping the voltage potential found
in the concrete we are able to determine rapidly the presence of
corroded steel reinforcement without costly and time consuming
demolition of the concrete.
is done by recording the voltage between the rebar and a half cell,
which is mapped across the surface of the concrete. Areas of rust with
high corrosion will exhibit significantly lower voltages than areas
without corrosion, thus areas of corroding steel reinforcing bar in
concrete can be rapidly found. There is no need to know the exact
position of the steel reinforcing bar or the amount of cover, the
presence of the steel is all that is required. However, the voltmeter
has to be connected to an exposed piece of the rebar network, and
because the concrete is being tested, any material on the surface should
Half Cell Reference
The Cor-Map II®
system comes complete with
half-cell designed for the tough construction environment. Porous
ceramic tips are used in order to provide
a long life, and
eliminate problems from clogs
in the Cu/CuSO4 half-cell.
s have been
designed to allow the half cell to take read
ings in the vertical,
horizontal or inverted position
. There is also a semi
view window, allowing liquid
level observation without removal of
the sealed ends; while still
ing the half
cell from damage by sunlight.
The fully integrated data acquisition
and analysis unit has been designed for the rapid analysis of data in
the field or office. As large amounts of data are normally generated,
interpretation of this information can be very difficult. Employing the
simple to use menu driven
CorMap® main unit,
data can not only be collected quickly and easily, but it can also be
analyzed directly in the field on the graphic display. The unit produces
a symbolic map of the structure, where symbols represent various
half-cell potential voltage levels previously acquired. This symbolic
map can then be interpreted like a contour map where areas of high
potential represent areas most likely to be corroding.
Not only can this information
be acquired and analyzed but the unit will also read the general
environmental parameters of temperature and relative humidity.
All this data can also be
stored and uploaded to a P.C. This allows the user to include the data
in subsequent reports and spreadsheets for further analysis. Each data
point is also recorded with the time and date to simplify later
6 lbs. ( 2.75 Kg )
15 lbs. ( 6.8 Kg )
4.5 in. x 8.5 in. x 10.5
(115mm x 225mm x 267 mm )
12 Volt 4 - 10 Hours Continuous
320 x 240
pixels backlit for daylight use
Over 5000 readings
0 - 50 C
Temperature Reading Range:
-273 - +130 C
Humidity Reading Range:
0 - 100%