GalvaPulse

For measuring corrosion rates, half-cell potentials and electrical resistance for corrosion evaluation in concrete reinforced structures.

Publications

Description

The portable, handheld GalvaPulse evaluates the corrosion rate of reinforcement by measuring polarization resistance using the galvanostatic pulse technique where a current pulse is imposed on the reinforcement from a counter silver chloride reference electrode (Ag/AgCl) placed on the concrete surface.

The reinforcement is polarized in the anodic direction compared to its free corrosion potential, Ecorr. The resulting change of the electrochemical potential of the reinforcement is recorded as a function of time. The polarization resistance of the reinforcement is calculated by curve fitting of this data and by means of the Stern-Geary equation and Faraday’s law, the corrosion rate is estimated.

Application

Monitoring corrosion activity in reinforced concrete structures.
Service life estimation.
Evaluating the efficiency of corrosion arresting measures such as application of inhibitors, membranes, electrochemical removal of chlorides, concrete realkalinization, etc.
Condition surveys of suspect reinforced structures, especially structures in wet environments where the classic half-cell potential mapping may provide misleading or insufficient information.
Measuring corrosion activity in repaired areas.

Specification

Reliable evaluation of reinforcement corrosion in anaerobic concrete environment.
Lightweight, handheld equipment, easy to operate.
Kit includes a calibration box and a check concrete block with embedded bars.
Easy-to-use software for reporting test results in 2D or 3D graphics.
Two operation modes:
1. Only for half-cell potentials and electrical resistance (1 to 2 s/test).
2. For corrosion rate, half-cell potentials and electrical resistance (5 to 10 s/test).

The first mode is normally used to identify the anodic and cathodic areas, while the second mode is used in anodic areas, where corrosion rate is a decisive parameter to be measured.
Suitable for testing on rough or curved surfaces.
Uses Ag/AgCl (silver / silver chloride) reference electrode.
Storage capacity: 20,000 records.
Current pulse generated: 5 to 400 mA from 1 to 20 seconds.
Pulse guard ring diameter: 70 mm.

Standards

Part List

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