Cathodic Disbonding at High Temperature

A new method for accelerated testing of cathodic disbonding at high temperature, simulating field conditions for coatings on submerged high temperature surfaces is developed. The method has now been further improved and a test program studying the effect of various test parameters have been performed, focusing on temperature, oxygen partial pressure, potential and hydrostatic pressure. The results are compared to a non-accelerated long term cathodic disbonding test in seawater and the ISO 15711 laboratory test. Other coating degradation mechanisms like adhesion loss and general thermal degradation of the coatings were also investigated.