Half-Cell Potential / Rebar Corrosion Test

Half-Cell Potential / Rebar Corrosion Test
The Half-Cell Potential Test is an electrochemical method for determining the possibility of active corrosion in embedded steel reinforcement within concrete. As described in ASTM C876, this method includes measuring the electrical potential difference between a reference electrode placed on the concrete surface and the steel reinforcement within. It does not directly measure corrosion rates, but rather evaluates the danger or possibility of corrosion activity. This approach is crucial for assessing the status of aged structures, since it provides information on concrete durability and the need for repair or rehabilitation. It is commonly used to monitor bridges, parking decks, marine constructions, and other environments where chloride infiltration or carbonation is an issue.

Advantages of Half-Cell Potential / Rebar Corrosion Test:

• Identifies places at high risk of reinforcement corrosion.
• Non-destructive, appropriate for large-scale surveys.
• Provides useful information for maintenance and rehabilitation plans.
• Prioritizes repair activities and resource allocation.
• Improves the long-term durability evaluation of concrete buildings.
• Compatible with the incorporation of corrosion management systems
• Can be used with other NDT procedures to provide full diagnosis.
• Encourages proactive infrastructure asset management.