Relevance of Cathodic Disbondment Test for Evaluating External Pipeline Coatings at Higher Temperatures

The cathodic disbondment (CD) test is a method for determining compatibility between external polymeric pipeline coatings and cathodic protection. This test measures the coating disbondment caused by electrical stress. The test evaluates the ability of the coating not to loosen or disbond under the stress of cathodic protection. Several standard procedures are available to conduct the test. This paper reviews applicability of various test procedures to conduct CD test at higher temperature, i.e., above 85oC. This paper also presents different factors affecting applicability of the CD test at higher temperatures.