Stress-corrosion cracking studies in coal-liquefaction systems
Coal liquefaction plants with 6000 ton/d capacity are currently being planned by DOE as a step toward commercial production of synthetic fossil fuels. These plants will demonstrate the large-scale viability of the Solvent Refined Coal (SRC) process, which has been used since 1974 in two operating pilot plants: a 50-ton/d unit at Fort Lewis, Washington, and a 6-ton/d plant in Wilsonville, Alabama. Experience in these plants has shown that austenitic stainless steels are susceptible to stress corrosion cracking associated with residual stresses from cold working or welding. The corrodants responsible for the cracking have not yet been positively identified but are suspected to include polythionic acids and chlorides. To screen candidate materials of construction for resistance to stress corrosion cracking, racks of stressed U-bend specimens in welded and as-wrought conditions have been exposed at the Wilsonville and Fort Lewis SRC pilot plants. These studies have identified alloys that are suitable for critical plant applications.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6591858
- Report Number(s):
- CONF-810402-9
- Resource Relation:
- Conference: Corrosion/81 annual meeting, Toronto, Canada, 6 Apr 1981
- Country of Publication:
- United States
- Language:
- English
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Results of u-bend stress-corrosion-cracking specimen exposures in coal-liquefaction pilot plants
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Related Subjects
SRC PROCESS
CORROSION
MATERIALS TESTING
STAINLESS STEELS
STRESS CORROSION
CHLORIDES
CHROMIUM-MOLYBDENUM STEELS
COAL LIQUEFACTION
CORROSIVE EFFECTS
CRACKS
INORGANIC ACIDS
OXYGEN COMPOUNDS
PILOT PLANTS
STAINLESS STEEL-316
STAINLESS STEEL-321
STAINLESS STEEL-347
SULFUR COMPOUNDS
ALLOYS
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
FUNCTIONAL MODELS
HALIDES
HALOGEN COMPOUNDS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HYDROGEN COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
LIQUEFACTION
MATERIALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NIOBIUM ADDITIONS
NIOBIUM ALLOYS
STEELS
TESTING
THERMOCHEMICAL PROCESSES
TITANIUM ADDITIONS
TITANIUM ALLOYS
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction