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08395 A Method to Reduce the Internal Current Effect on Corrosion Rate Measurements with Coupled Multielectrode Array Sensors

Picture for 08395 A Method to Reduce the Internal Current Effect on Corrosion Rate Measurements with Coupled Mul
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Product Number: 51300-08395-SG
ISBN: 08395 2008 CP
Author: Lie Yang and Xiaodong Sun
Publication Date: 2008
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Coupled multielectrode array sensors (CMAS) have been extensively used to measure localized corrosion rate in laboratories and plants. A convenient way to calculate localized corrosion rate is to assume that the internal current flow within the most anodic electrode is insignificant. In cases where the environment is not significantly corrosive, this assumption may not be true. The internal electron that flows on the most corroding electrode may cause the CMAS to underestimate the non-uniform corrosion rates. A new method has been derived to minimize the internal currents within the most anodic electrode. This paper describes the method and presents some experimental results.
Coupled multielectrode array sensors (CMAS) have been extensively used to measure localized corrosion rate in laboratories and plants. A convenient way to calculate localized corrosion rate is to assume that the internal current flow within the most anodic electrode is insignificant. In cases where the environment is not significantly corrosive, this assumption may not be true. The internal electron that flows on the most corroding electrode may cause the CMAS to underestimate the non-uniform corrosion rates. A new method has been derived to minimize the internal currents within the most anodic electrode. This paper describes the method and presents some experimental results.
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