Associated Testing Laboratories
Half cell potential test
Half cell potential test
Introduction
The Half Cell Potential Test is a highly effective Non-Destructive Testing (NDT) technique used to evaluate the corrosion activity of reinforcement steel inside concrete structures.
At [Your Company Name], we use advanced half-cell measurement equipment to provide accurate assessment of structural health, durability, and corrosion risk.
What is the Half Cell Potential Test?
The Half Cell Potential Test measures the electrical potential difference between embedded steel reinforcement and a reference electrode placed on the concrete surface.
This potential indicates the likelihood of corrosion in the reinforcement.
It does not measure corrosion rate but predicts the probability of active corrosion inside the concrete.
Purpose of Half Cell Potential Test
To evaluate the risk of reinforcement corrosion
To identify zones with active corrosion
To assess the durability of existing concrete structures
To support structural audit and rehabilitation planning
To complement other NDT tests like Carbonation, Rebound Hammer, and UPV
Standards Followed
We perform the Half Cell Potential Test in compliance with:
ASTM C876 – Standard Test Method for Corrosion Potential of Uncoated Reinforcing Steel
IS 13311 (Part 1 & 2) for supporting NDT procedures
How the Test Works
The concrete surface is moistened (if required) for proper electrical conductivity.
A reference electrode (commonly Copper-Copper Sulphate Electrode – CSE) is placed on the concrete surface.
The electrode is connected to the reinforcing bar through a wire.
A digital voltmeter records the potential difference.
Multiple readings are taken in a grid pattern to develop a corrosion potential map.
Interpretation of Results (ASTM C876 Guide)
>-200 mV: Low probability of corrosion
-200 mV to -350 mV: Uncertain corrosion probability
<-350 mV: High probability of active corrosion
These guidelines help determine risk levels and appropriate repair strategies.
Applications of Half Cell Potential Test
The test is widely used for:
Old or deteriorated structures
Bridges, flyovers, and parking decks
Industrial plants and warehouses
Coastal & chemical-exposed structures
Buildings undergoing repair or retrofitting
Condition assessment before construction/renovation
Advantages of Half Cell Potential Test
Completely non-destructive
Identifies hidden corrosion activity
Helps prevent major structural failures
Useful for long-term maintenance planning
Provides clear corrosion potential mapping
Our Half Cell Testing Services
We offer:
On-site potential mapping using calibrated instruments
Corrosion risk evaluation
Integration with NDT tests (UPV, RH, Carbonation, Cover Meter)
Detailed reporting and interpretation
Recommendations for rehabilitation and repair
Why Choose Us?
Experienced NDT & structural engineers
Precise and reliable readings
Standardized testing as per ASTM
Fast reporting with actionable insights
High-quality service at competitive pricing
Our Services
Get in Touch with us
Cost Effective Great Quality
Through smart planning, skilled execution, and efficient resource management, we provide services that maintain outstanding quality while keeping costs under control. Our approach guarantees that every project delivers durability, precision, and value without compromise.
