Effect of sulfation accelerators on the corrosion behavior of materials in fluidized-bed environments

Conference · Mon Jan 01 04:00:00 EST 1979

OSTI ID:5845095

Chopra, O K; Shearer, J A; Turner, C B

Enhancement of limestone sulfation in a fluidized-bed combustion environment by the addition of accelerators, such as NaCl and CaCl/sub 2/, can greatly reduce the quantity of limestone needed to achieve acceptable SO/sub 2/ emission levels. However, the presence of alkali-metal compounds in the fluidized bed could contribute to corrosion of structural materials in the boiler and downstream components. In the present study, the corrosion behavior of various iron- and nickel-base alloys is evaluated as functions of temperature and chloride content in the bed. Corrosion specimens were exposed for 100 h within and above a fluidized bed of limestone. The fluidizing gas contained SO/sub 2/, O/sub 2/, and N/sub 2/. Under the test conditions, the addition of NaCl and CaCl/sub 2/ to the fluidized bed increased the corrosion rates. In general, the austenitic iron-base materials performed better than nickel-base superalloys. The results of detailed metallographic examination of the corrosion specimens are presented.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5845095
• Report Number(s): CONF-7910110-1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALLOY-RA-333
ALLOYS
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CARBON COMPOUNDS
CARBONATE ROCKS
CARBONATES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-MOLYBDENUM STEELS
CHROMIUM-NICKEL STEELS
COBALT ALLOYS
CORROSION
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
DOLOMITE
FLUIDIZED BED REACTORS
FUEL DISPERSION REACTORS
HALIDES
HALOGEN COMPOUNDS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HOMOGENEOUS REACTORS
INCOLOY 800
INCOLOY ALLOYS
INCONEL 600
INCONEL ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
LIMESTONE
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MANGANESE ALLOYS
MATERIALS
MINERALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
OXYGEN COMPOUNDS
REACTORS
RESERVOIR ROCK
ROCKS
SEDIMENTARY ROCKS
SILICON ALLOYS
SODIUM CHLORIDES
SODIUM COMPOUNDS
STAINLESS STEEL-304
STAINLESS STEEL-310
STAINLESS STEEL-316
STAINLESS STEEL-321
STAINLESS STEELS
STEELS
TITANIUM ADDITIONS
TITANIUM ALLOYS
TUNGSTEN ALLOYS