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96200 THE PIPE-SOIL INTERFACE AND THE -0.85 VOLT CATHODIC PROTECTION CRITERION ON STEEL PIPELINES

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Product Number: 51300-96200-SG
ISBN: 96200 1996 CP
Author: L. A. Bash
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Considerable controversy persists among cathodic protection (CP) practitioners concerning the science involved with the pipe-soil (P/S) interface and the -0.85 Volt (V), co per/copper sulphate electrode, CP criterion on buried steel pipelines. Much of the controversy stems from differences in past and present electrical models of the P/s interface and the past and present definitions of the word polarization and the term “polarized potential”. Laboratory data, field data and information from past and present CP literature references are presented and discussed in this article in an endeavor to resolve some of the more divisive controversy that persists. Keywords: Cathodic Polarization, Polarized Potential, P/s Interface, Tafel’s Law, Electrode Voltage, Normal Concentration Polarization, -0.85 V Criterion, R–C Circuit, Solutions.
Considerable controversy persists among cathodic protection (CP) practitioners concerning the science involved with the pipe-soil (P/S) interface and the -0.85 Volt (V), co per/copper sulphate electrode, CP criterion on buried steel pipelines. Much of the controversy stems from differences in past and present electrical models of the P/s interface and the past and present definitions of the word polarization and the term “polarized potential”. Laboratory data, field data and information from past and present CP literature references are presented and discussed in this article in an endeavor to resolve some of the more divisive controversy that persists. Keywords: Cathodic Polarization, Polarized Potential, P/s Interface, Tafel’s Law, Electrode Voltage, Normal Concentration Polarization, -0.85 V Criterion, R–C Circuit, Solutions.
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