FAILURE ANALYSIS: DISBONDED COATING AND CATHODIC PROTECTION SHIELDING FOR PIPELINES AND UTILITY POLES

摘要

Atremendous amount of financial loss is incurred every year as a result of premature failures of paints and coatings. The cost to repair such failures far outweighs the initial cost of painting because excessive rigging may be needed to access the failing areas. Additional liability may also be expected if a facility must stop operation for the necessary repairs to be made. Coating failures can occur for dozens of reasons, although they are typically the result of poor application or surface preparation, a defective coating or an inadequate specification. A determination of the fundamental causes behind coating failures is critical. Not only does this help in assigning financial responsibility, but also knowing how a coating has failed is often the first step in planning how to fix it.