Study on Corrosion Fatigue Phenomena and Lifetime Improvement of Steam Turbine Blades Used for Mechanical Drives (2nd Report: Operation Life Extension by Blade Surface Treatment and Coating)

摘要

New concept hybrid coating was developed in order to systematically prevent deposits on blade profile up to medium temperature zone, corrosion fatigue and erosion damage for low-pressure blade on chemical enrichment zone of mechanical-drive steam turbines. Practical element tests were conducted to evaluate basic features of this unique coating. Actual blade was coated to confirm coating condition for preparation of actual application.