Half Cell Potential (HCP)

Half cell potential measurement is used to evaluate the potential for corrosion, and subsequently, the durability of concrete reinforcement. It provides a standardised outcome and can deliver fast results.

Applications of Half Cell Potential

The test is cost-effective and can be used in any concrete structure where a connection point to the rebar network is possible. The survey is described in the ASTM C876 standard and can be carried out alongside Xradar™ Corrosion Mapping to cross reference corrosion results.

HCP is most suitable for concrete structures such as parking lots, concrete piers, docks and tunnels.


Half cell potential works by measuring the potential difference between a reference electrode placed on the surface of the concrete and the rebar network within the structure beneath.

Measurements are done in a grid pattern, and subsequent data points are gridded to provide a contour map of the half cell potential gradient values throughout the survey area.