Influencing Factors on Cathodic Disbonding of Buried Pipeline Coatings

The best protection method for preventing buried pipelines from corrosion is the combined protection of anticorrosive coating and cathodic protection. But in some conditions, the cathodic protection can cause cathodic disbonding between the coating and base material, which will lead to the coating failure and wasting of energy and metal, and increase much difficulty and uncertainty in the cathodic protection engineering design and maintenance process. Therefore, when the anticorrosive coating and the cathodic protection are used together, the coating of anti-cathode stripping is particularly important. This paper summarizes the influence of coating performance, cathodic protection potential and other factors on the occurrence and development of the coating cathodic disbonding, and introduces the research progress of the pipeline coating's cathodic disbonding at home and abroad.