Corrosion, which is an electrochemical process, occurs in concrete when oxygen and moisture are present. The measurements made with the Cor Map apparatus, using the half cell method, can be plotted on a grid and lines of equipotential contours drawn, highlighting areas of possible corrosion activity.
A simple economical method for identifying areas of probable rebar corrosion in (for example)
- Bridge decks
- Parking garages
- Concrete piers and docks
- Tunnel lining