Concrete Testing Equipments

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Rebar Corrosion Tester
Rebar Corrosion Tester Rebar Corrosion Tester is used to determine the corrosion of reinforcing steel bars (rebar) within concrete by measuring the electrical potential difference between rebar and a reference electrode embedded, Indicating the corrosion activity and need for maintenance or repair ...Read more

Rebar Corrosion Tester


  • Description

Rebar Corrosion Tester

Rebar Corrosion Tester is used to determine the corrosion of reinforcing steel bars (rebar) within concrete by measuring the electrical potential difference between rebar and a reference electrode embedded, Indicating the corrosion activity and need for maintenance or repair of the concrete structure. 

NL Scientific Rebar Corrosion Tester is designed according to the electrochemical testing method (natural potential method) of “construction testing technical standard”. The steel corrosion on the structure of concrete reduces the effective section area of steel and increases in volume, which leads to the expansion of concrete, spalling, reinforcement of steel and concrete, and the reduction of bearing capacity, directly affecting the safety and durability of the concrete structure.

Corrosion of rebar can compromise the structural integrity of concrete, leading to potential safety hazards and costly repairs. By monitoring changes in this potential over time, engineers can assess the rate of corrosion and determine the need for maintenance or repair of the concrete structure. Rebar corrosion testers are essential tools in the field of civil engineering, particularly for evaluating the condition of infrastructure such as bridges, buildings, and highways.

Features of Rebar Corrosion Tester

  • High detection accuracy (accuracy of corrosion voltage is ±0.1 mv)
  • The test results are displayed in hierarchical graphics
  • Two working modes of single and double-electrode
  • Calibration to ensure precise and reliable measurements against known reference values.
  • Digital Display presents real-time measurements of corrosion potential or other relevant data.

Test Procedure of Rebar Corrosion Tester

  1. Preparation: The concrete surface around the surface must be clean from debris or contaminants that could interfere with the test procedure.

  2. Electrode Placement: Position the reference electrode on the concrete surface near the rebar of interest. Attach the working electrode to the rebar securely.

  3. Tester Calibration: Perform the calibration procedure as outlined in the manufacturer's instructions to verify and optimize the accuracy of the readings obtained from the tester.

  4. Activation: Turn on the tester and initiate the corrosion measurement process.

  5. Measurement: Allow the tester to measure the potential difference between the reference electrode and the rebar. This measurement indicates the level of corrosion activity at the rebar surface.

  6. Data Collection: Record the measured potential difference displayed on the tester's interface.

  7. Data Analysis: Evaluate the recorded data to interpret the corrosion condition of the rebar. Elevated potential differences signify heightened corrosion activity, whereas lower readings imply minimum corrosion levels. 

  8. Repeat Testing (Optional): If necessary, repeat the test at different locations or rebar sections to obtain a comprehensive assessment of corrosion levels throughout the structure.

  9. Documentation: Document the test results, including the measured potential differences and any relevant observations, for future reference.

  10. Maintenance Planning: Employ the test results to formulate effective strategies for maintenance and corrosion prevention, ensuring the longevity and durability of the concrete structures.  

Technical Specifications of Rebar Corrosion Tester

 Model Number     NL 4049 X / 001
 Accuracy
 0.1 mV
 Power
 Built-in chargeable lithium battery, standby time >40 hours   
 Data Storage
 234 points
 Screen
 160 mm x 128 mm LCD
 Electrode Size
 Ø 30 mm x 180 mm
 Test Area  234 m²
 Size  212 mm x 134 mm x 50 mm
 Weight   0.9 kg

Unit Consists Of:

 Model Number     Descriptions
 NL 4049 X / 001 – P001
 Control Kits
 NL 4049 X / 001 – P002
 Electrode   
 NL 4049 X / 001 – P003
 Signal Wire
 NL 4049 X / 001 – P004
 Waterproof case

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