| TEST KITS AND TEST EQUIPMENTS | CORROSION MAPPING SYSTEM |
Designed and Manufactured for Cathodic
Protection Testing of Underground Steel Storage
Tanks and Systems.
A complete test kit designed for
use by non-technical personnel, such as crews, servicemen,
meter readers, etc., but also suitable for the most experienced engineers and
technicians.
Specifications
| 2
½" taut-band rugged instrument. Weatherproofed neoprene gasket. 10 megohms input resistance. Solid-state impedance amplifier. Operates on one 9 V transistor battery. Low drain - long shelf life. Push switch to check battery condition. Scale marked 0 to 2 Volts DC. Color band: red to .85 V, green to 2 V. Filter eliminates errors caused by AC. |
Battery
easily replaced and readily available. Push switch to read potentials. Current drain only while taking readings. Up to 50 volts 50/60 Hz. Operating temperature: 0oF to 150oF. Molded PVC housing. Plastic carrying case with resilient padding Modular construction Weight: about 3 lbs. Size: 2 ½" deep x 10" long. |
Close overt-the-tank / structure potential measurements
Fixed cell-moving ground technique for Checking Continuity Between Structures
Note: Model IA includes Tank Test
meter, RE-5 CuSO4 electrode, two 8' test leads, battery,
top and bottom protective covers, and carrying case. Shipped assembled in case.
Optional Accessory
Intermediate Electrode Extensions,
30" and 15" long. One or more can be used with MCM
Model ETM, IA and LC series meters, or between the electrode and the standard
electrode
extension so that the electrode can be easily placed at the desired location
inside manholes,
water tanks, etc. Will fit through a 1" diameter augered hole.
Concrete
Corrosion Mapping System
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Sample Applications Bridge Decks |
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General Information
The nature of concrete corrosion is an exchange of energy within different sections of the reinforcing steel. At the anode, corrosion occurs and iron ions are released into the electrolyte. The relative energy levels can be determined in relation to a reference electrode with a stable electrochemical potential. A high impedance voltmeter is connected between the reinforcing steel and a reference electrode placed on the surface of the concrete. The resulting potential reading on the voltmeter is an indication of the energy levels (corrosion activity) of the steel in the vicinity of the reference cell.
Half cell potential measurements serve as an important means of determining the probability of corrosion activity on the structure's reinforcing steel. These measurements, which are related to the electrochemical nature of corrosion, allow an accurate survey to be performed in a short period of time.
Data from these surveys can be plotted
to provide an easy to interpret graphic picture of the structure.
From this plot, as typically shown below, probable corrosion areas and the total
area of the structure subject to corrosion can be determined.
Typical concrete slab
section with steel reinforcement (rebars).
Potential measurements obtained on 4' centers of 24' x 48' panel.
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