Testing erosion-resistant chromium carbide plasma coatings on the TVA Paradise Unit-2 intermediate pressure turbine
Technical Report
·
OSTI ID:5471552
Solid particle erosion (SPE) is caused by oxide particles in steam. Hard oxide particles exfoliate from the inside surfaces of boiler tubes and steam lines and are carried by the steam to the turbine where they impact and erode stationary and moving turbine parts (nozzles, moving blades, stationary blades, seal strips, and shrouds around the blades). The first stages of the high pressure (HP) and intermediate pressure (IP) turbines experience the greatest amount of SPE. Though many owners experience erosion in the first stages of both HP (main steam) and IP (reheat steam) turbines, TVA's principal erosion experience is in the IP or reheat steam turbines. This report is limited to the first few stages of IP turbines, referred to as ''first reheat stages.'' Hard chromium carbide plasma coatings have been developed. The coating was installed in Paradise Unit-2 IP turbine, 9th and 10th stages. Pretest inspection report is given.
- Research Organization:
- Tennessee Valley Authority, Chattanooga (USA). Div. of Energy Demonstrations and Technology
- OSTI ID:
- 5471552
- Report Number(s):
- TVA/OP/EDT-86/27; ON: DE86901719
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
200104* -- Fossil-Fueled Power Plants-- Components
CARBIDES
CARBON COMPOUNDS
CHROMIUM CARBIDES
CHROMIUM COMPOUNDS
COATINGS
DEPOSITION
EROSION
EXPERIMENT PLANNING
FOSSIL-FUEL POWER PLANTS
MACHINERY
NATIONAL ORGANIZATIONS
PARTICLES
PLANNING
PLASMA ARC SPRAYING
POWER PLANTS
PROTECTIVE COATINGS
SPRAY COATING
STEAM TURBINES
SURFACE COATING
TENNESSEE VALLEY AUTHORITY
THERMAL POWER PLANTS
TRANSITION ELEMENT COMPOUNDS
TURBINES
TURBOMACHINERY
US ORGANIZATIONS
200104* -- Fossil-Fueled Power Plants-- Components
CARBIDES
CARBON COMPOUNDS
CHROMIUM CARBIDES
CHROMIUM COMPOUNDS
COATINGS
DEPOSITION
EROSION
EXPERIMENT PLANNING
FOSSIL-FUEL POWER PLANTS
MACHINERY
NATIONAL ORGANIZATIONS
PARTICLES
PLANNING
PLASMA ARC SPRAYING
POWER PLANTS
PROTECTIVE COATINGS
SPRAY COATING
STEAM TURBINES
SURFACE COATING
TENNESSEE VALLEY AUTHORITY
THERMAL POWER PLANTS
TRANSITION ELEMENT COMPOUNDS
TURBINES
TURBOMACHINERY
US ORGANIZATIONS