High-Temperature Cathodic Disbondment Testing: Review and Survey-Part 1

Cathodic disbondment testing has historically been performed on protective coatings to assess coating delamination resistance when exposed to cathodic polarization. Unfortunately, there is no broadly accepted high-temperature cathodic disbondment testing standard in the pipeline industry. Factors that affect the high-temperature cathodic disbondment test behavior of fusion-bonded epoxy-based coatings are reported, as well as the results of a global survey on laboratory test practices. Part 2 of this article, to be published in March 2015 MP, will discuss a program that tested the cathodic disbondment of an actual pipe coating.