CorrTranTM MV Innovations in Corrosion Monitoring
CorrTranTM MV from Pepperl+Fuchs is the first, 2 wires; 4
20 mA transmitter that evaluates either general and localized (pitting) corrosion in the same industrialized, transmitter housing. Meant to take corrosion evaluation out of the laboratory and into everyday process control. CorrTranTM MV is a revolutionary approach to corrosion monitoring. Over the years, CorrTranTM MV customers have been able to monitor real-time corrosion behavior and react to it before significant damage has occurred. CorrTranTM MV takes this success to a new level with a simple, easy to-use 2 wire transmitter operating on the industry standard 4
20 mA control basis and easily integrated HART protocol.
CorrTranTM MV Operation
At the heart of CorrTranTM MV are state-of-the-art, patented algorithms and data analysis techniques that accurately measure corrosion rate and localized corrosion (pitting). Harmonic distortion analysis (HDA) is applied to improve the performance of the industry accepted linear polarization resistance (LPR) technique used to measure corrosion rate. During a measurement cycle, CorrTranTM MV performs a unique electrochemical noise (ECN) measurement, which in combination with the corrosion rate data provides a measurement of pitting. At the completion of each measurement cycle, the respective corrosion rate and pitting value is calculated and made available to the plant personnel in the form of a 4…20 mA HART signal.
The LPR technique has long been in the industry standard for general corrosion monitoring and it is based on the Stearn-Geary (B-value) relationship. This B-value relationship correlates the potential excitations with the measured corrosion current to produce a measurement of polarization resistance.
This resistance is then used to determine the general corrosion rate.
The HDA analysis is based on an evolution of the LPR technique. By applying a low frequency sine wave to the measurement current, the resistance of the corrosive solution can be calculated through a harmonic analysis of the resulting signals.
With both the polarization resistance and the solution resistance, a more accurate general corrosion rate can be determined. Lastly the ECN method allows the localized corrosion rate to be calculated. ECN method is the measurement of spontaneous fluctuations generated at the corroding metal-solution interface. This measurement is only possible with a 3 electrode probe configuration and is used to determine the existence of localized corrosion.
Specifications:
The standard probes used for corrosion detection on CorrTranTM MV consist of 3 electrodes- 2 for measurement and 1 for reference. In order to get an accurate measurement, the electrodes must be made of the same material as the pipe or tank being monitored. The sacrificial electrodes with a small signal are placed directly in the flow of corrosive media. These signals are monitored and analyzed by the transmitter over a period of 20 minutes in order to get an accurate representation of corrosion.
At the heart of CorrTranTM MV are state-of-the-art, patented algorithms and data analysis techniques that accurately measure corrosion rate and localized corrosion (pitting). Harmonic distortion analysis (HDA) is applied to improve the performance of the industry accepted linear polarization resistance (LPR) technique used to measure corrosion rate. During a measurement cycle, CorrTranTM MV performs a unique electrochemical noise (ECN) measurement, which in combination with the corrosion rate data provides a measurement of pitting. At the completion of each measurement cycle, the respective corrosion rate and pitting value is calculated and made available to the plant personnel in the form of a 4…20 mA HART signal.
The LPR technique has long been in the industry standard for general corrosion monitoring and it is based on the Stearn-Geary (B-value) relationship. This B-value relationship correlates the potential excitations with the measured corrosion current to produce a measurement of polarization resistance.
This resistance is then used to determine the general corrosion rate.
The HDA analysis is based on an evolution of the LPR technique. By applying a low frequency sine wave to the measurement current, the resistance of the corrosive solution can be calculated through a harmonic analysis of the resulting signals.
With both the polarization resistance and the solution resistance, a more accurate general corrosion rate can be determined. Lastly the ECN method allows the localized corrosion rate to be calculated. ECN method is the measurement of spontaneous fluctuations generated at the corroding metal-solution interface. This measurement is only possible with a 3 electrode probe configuration and is used to determine the existence of localized corrosion.
Specifications:
The standard probes used for corrosion detection on CorrTranTM MV consist of 3 electrodes- 2 for measurement and 1 for reference. In order to get an accurate measurement, the electrodes must be made of the same material as the pipe or tank being monitored. The sacrificial electrodes with a small signal are placed directly in the flow of corrosive media. These signals are monitored and analyzed by the transmitter over a period of 20 minutes in order to get an accurate representation of corrosion.
This product information
is expired!
Use our search-function for current products ...
is expired!
Use our search-function for current products ...
