Summary of all activities of Metallic Construction Materials group is here.
Information on the actual corrosion aggressiveness of environment is crucial for effective corrosion protection. Implementation of on-line and real time monitoring enables operators to take immediate countermeasures if corrosion is accelerating and decrease thus the negative impact and costs of corrosion.
The principle of the resistometric monitoring is simple and yet highly effective. The electric resistance of a measuring element made of the material of interest increases as its cross-sectional area decreases due to corrosion. In practice, two such elements are built into a probe. One element is exposed to the corrosive environment and corrodes, whereas the other element is shielded and, thus, protected from corrosion. The resistances of both elements are measured at the same time and resistivity changes due to varying temperature are compensated for. Based on the initial cross-sectional area of the exposed element, the cumulative metal loss at the time of reading can be determined.
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Measurement with brass sensors with different coatings exposed in air polluted with acetic acid
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Schematic drawing shows a resistometric sensor for atmospheric applications with the sensing part on the left hand side and the reference part on the right |
We offer design, installation, maintenance and data evaluation of corrosion monitoring systems.
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Advantages of MetriCorr and AirCorr sensors and loggers we use:
- Continuous monitoring of sensor thickness reduction (residual sensor thickness).
- Assessment of the total and actual corrosion rate and corrosion aggressiveness of the environment.
- Short response time and high sensitivity.
- Universal applicability in soil, atmosphere, water and other liquids without limitations by electric conductivity.
- Small sensor size allowing for easy installation even in constrained areas.
- Corrosion monitoring for a wide range of materials; sensors made of steel, zinc, copper, silver, lead, aluminium, tin, brass and bronze are available.
- Sensors made of practically any pure of alloy metal can be produced upon request.
Resistometric sensors can be used for monitoring of
- Corrosion rate of steel rebar in concrete.
- Efficiency of cathodic protection of buried structures such as pipelines.
- Corrosion aggressiveness during transport of products.
- Efficiency of air quality control in museums, archives and computer rooms.
- Corrosivity in industrial environments.
About us
Technopark Kralupy is a spin-off of The University of Chemistry and Technology Prague serving the Czech and international industry in the field of building chemistry and similar subjects since 2015.
Contact
Department of Metallic Construction Materials
Technopark Kralupy of the University of Chemistry and Technology Prague
Technopark Kralupy VŠCHT Praha
Náměstí G. Karse 7
278 01 Kralupy nad Vltavou
Czech Republic
kovy@technopark-kralupy.cz
Phone: +420 220 446 104, +420 723 242 413
© 2017–2020 Technopark Kralupy
