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05029 Practical Analysis of Cathodic Disbondment Test Methods

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A review of cathodic disbondment test (CDT) methods from standard organizations such as ASTM, ISO, CSA, NF and AS is presented in this paper.

Product Number: 51300-05029-SG
ISBN: 05029 2005 CP
Author: Katherine Cameron, Jiri Holub, and Dennis T. Wong, ShawCor Ltd.
Publication Date: 2005
Industries: Cathodic Protection , Coatings and Linings
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A review of cathodic disbondment test (CDT) methods from standard organizations such as ASTM, ISO, CSA, NF and AS is presented in this paper. Factors affecting CDT such as substrate and electrolyte temperature, anode configuration, anolyte isolation, electrolyte composition, voltage gradients and methods of heating are examined. These factors can significantly affect the rate of disbondment, the mechanism of failure and the relationship to field performance. The information provided is applicable to selecting appropriate methods for product specification and realistic interpretation of data for evaluating coating performance.

Keywords: cathodic disbondment, coatings, buried pipeline

A review of cathodic disbondment test (CDT) methods from standard organizations such as ASTM, ISO, CSA, NF and AS is presented in this paper. Factors affecting CDT such as substrate and electrolyte temperature, anode configuration, anolyte isolation, electrolyte composition, voltage gradients and methods of heating are examined. These factors can significantly affect the rate of disbondment, the mechanism of failure and the relationship to field performance. The information provided is applicable to selecting appropriate methods for product specification and realistic interpretation of data for evaluating coating performance.

Keywords: cathodic disbondment, coatings, buried pipeline

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ISBN: 07021 2007 CP
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The research described in this paper was carried out with the objective of establishing any correlation between coating performance and the results of cathodic disbondment testing. Experiments were carried out using 13 coatings. Nine samples of each coating were studied in a total of 117 experiments.
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