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97283 ON-LINE CORROSION RATE MEASUREMENTS USING CURRENT lNTERRUPTED GALVANOSTATIC POLARIZATION

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Product Number: 51300-97283-SG
ISBN: 97283 1997 CP
Author: Gregory A. Martinchek, Max R. Yaffe
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A corrosion rate monitoring device incorporating current interrupt IR compensation has been developed. The device is based on galvanostatic cell control with the current adjusted in software to give a fixed polarization voltage. In effect, the device acts as a potentiostat, while gaining significant advantages due to its galvanostatic cell control. The electronic circuitry and control algorithm of the device is outlined. The theory of the basic measurement and of current interrupt IR compensation are discussed. A prototype unit was built and was used to measure results on model cells built from resistors and capacitors. The results predict field performance superior to existing devices when measuring poorly conductive solutions. The device is predicted to measure ... Keywords: Corrosion Monitor, Linear Polarization, Solution Resistance, IR Compensation, Galvanostat, Current Interrupt, Low Conductivity, Polarization Resistance
A corrosion rate monitoring device incorporating current interrupt IR compensation has been developed. The device is based on galvanostatic cell control with the current adjusted in software to give a fixed polarization voltage. In effect, the device acts as a potentiostat, while gaining significant advantages due to its galvanostatic cell control. The electronic circuitry and control algorithm of the device is outlined. The theory of the basic measurement and of current interrupt IR compensation are discussed. A prototype unit was built and was used to measure results on model cells built from resistors and capacitors. The results predict field performance superior to existing devices when measuring poorly conductive solutions. The device is predicted to measure ... Keywords: Corrosion Monitor, Linear Polarization, Solution Resistance, IR Compensation, Galvanostat, Current Interrupt, Low Conductivity, Polarization Resistance
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