Corrosion of reinforcing steel is a major issue in the civil sector. This is controlled by applying a coating to the structure. The SensCorr measures very accurately the performance of this coating and thus determines the maintenance interval. Also reinforcing steel under cathodic protection can be measured, both the potential and the current density.
Normally the SensCorr ‘standalone version’ with data through G4-radiotransmission and solar power supply is used. However also the SensCorr ‘industrial’ with 4-20 mA HART Interface is possible. Another option, more for temporary measurements, is data logging on a SD Card.
The interface (the HART Loop Converter), if applicable, transfers 4 parameters:
- The ER metal loss in micrometer.
- The LPR corrosion rate in mm/year according to ASTM G59.
- The Pitting Index according to ASTM G199.
- The resistivity of the electrolyte in Ohm.cm.
The Zeelandbrug (1965) is a State Monument. Like any other asset, it requires maintenance. Corrosion of the rebars causes crumbling of the concrete. The corrosion can be stopped by applying a coating.
The SensCorr measures this corrosion at high accuracy. It uses the combined technologies of ‘Electrical Resistance’, ‘Linear Polarisation Resistance’ and ‘Electrochemical Noise’. The interface of the instrument is radiographic to a G4 server, through the Internet of Things.