Cathodic disbonding at elevated temperatures has not been thoroughly studied. As offshore oil and gas production moves towards higher temperatures there is a need for a better understanding of coating degradation, products with higher temperature limits and probably also new guidelines for design of cathodic protection. Standard test methods for high temperature cathodic disbonding are available, primarily for pipeline coatings. However, these methods may not be applicable for offshore structural coatings. The objective with this work is to design a test method that simulates the exposure conditions for coatings on submerged high temperature constructions. Cathodic disbonding is normally considered to be the main degradation mechanism for submerged coatings, but as temperature increases other degradation mechanisms may actually become more important, e.g. thermal degradation of the binder. Hence, how the high temperature affects e.g. film and barrier properties will also an important part of this work.
展开▼
