09443 An Oxidation Power Sensor for Monitoring General Corrosion

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Product Number: 51300-09443-SG

ISBN: 09443 2009 CP

Author: Xiaodong Sun and Lie Yang

Publication Date: 2009

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A simple oxidation power sensor (OPS) that has only a single electrode was proposed for the measurements of the bounding corrosion rates of actual equipment components. The OPS electrode is made from a non-consumable noble metal and does not need frequent changes or maintenance. The electrode of the OPS is placed near and electrically coupled to the system components to be measured. A modified OPS that has multiple electrodes and provides a correction factor for the estimation of the corrosion rate from the bounding corrosion rate was also proposed. Verification tests were conducted in parallel with a coupled multielectrode array sensor for carbon steel in selected solutions. It was found that there was a good agreement between the trends of the bounding corrosion rates from the simple OPS and the localized corrosion rates from the CMAS probe. There was also an excellent agreement between the corrosion rate from the modified OPS in simulated sweater and the reported general corrosion rate obtained in long term-immersion tests in actual seawater.

Keywords: corrosion sensor, corrosion monitoring, oxidation power sensor, oxidation capacity sensor, cathodic capacity sensor, non-destructive sensor, multielectrode sensor, online corrosion sensor, real-time corrosion sensor, coupled electrodes, coupled multielectrode, multiple electrodes, galvanic sensor