产品详情
美国NDT James C-CM-4000 Cor-Map钢筋锈蚀检测仪
产品名称：筋锈蚀检测仪
型号：C-CM-4000
厂家：美国NDT James
产品描述:
简单而经济的测定钢筋潜在腐蚀位置的方法。高阻抗电压表连接钢筋及参考电极, 可量度半电池电势。
A simple economical b for identifying areas of probable rebar
corrosion.
Applications
-
Locate corroding steel reinforcement
Features & Benefits
· Easy to use.
· Detachable electrode extension pieces facilitate measurements in
hard to reach bs.
· High impedance digital meter is designed for tough field
conditions.
· Electrode is designed for use on horizontal, vertical and
inverted bs.
· Economical.
· Conbs to ASTM C-876.
An economical b for identifying areas of corrosion ASTM C-876.
A high impedance voltmeter is connected between the reinforcing steel and a
Cu-CuSO4 reference electrode on the concrete surface where a measurement can be
made for the half-cell potential.
This measurement of the probability of corrosion activity. By testing at a
fixed distance apart, a grid of half-cell potentials can be developed and areas
delineated.
Technical
Corrosion, which is an electrochemical process, occurs in concrete when
oxygen and moisture are present. The actual corrosion is an exchange of energy
within different sections of the uncoated reinforcing steel. The relative energy
levels can be determined in relation to a reference electrode with a stable
electrochemical potential.
By connecting a high impedance voltmeter between the reinforcing steel and
a reference electrode placed on the concrete surface, a measurement can be made
for the half cell potential at the b of the reference cell. This then is
a measurement of the probability of corrosion activity in the steel in the
vicinity of the reference cell.
The reference cell is copper in a copper sulphate solution. By taking half
cell potential measurements a fixed distance apart a grid of half cell
potentials can be quickly made and thus areas delineated with a high probability
of corrosion of the reinforcing steel.
To analyze the results, the measurements made with Cor Map™ can be plotted on a grid and lines of equipotential contours drawn,
highlighting areas of possible corrosion activity.
For example the following guide is listed in ASTM
C-876 using a copper/copper sulphate half cell:
· For readings of 350mV and greater there is a 95% chance of active
steel corrosion
· For readings 200 to 350mV there is a 50% chance of active steel
corrosion
· For readings less than 200mV there is only 5% chance of active
steel corrosion
The b is particularly useful for:
· Bridge Decks
· Parking Garages
· Concrete Piers & Docks
· Substructure
· Tunnel Lining
· Foundations
Specifications
|
C-CM-4500
|
High impedance voltmeter
|
|
C-CM-4410
|
Electrode extension pieces each 18 inches (41 cm)
long
|
|
C-CM-4400
|
Reference electrode including copper sulphate
reservoir
|
|
C-CM-4210
|
Container of copper sulphate (capacity 250 ml)
|
|
C-CM-4220
|
Wetting agent reservoir (capacity 125 ml)
|
|
C-CM-4420
|
Dispensing sponge
|
|
C-CM-4300
|
Cable reel with 250 ft. (80 meters) cable
|
|
C-CM-4000
|
Complete system
|
以上是美国NDT James C-CM-4000 Cor-Map钢筋锈蚀检测仪
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