Corrosion assessment in FBC (fluidized-bed combustion) systems
Metallic materials selected for the construction of heat exchangers and tube support structure in fluidized-bed combustion (FBC) systems must withstand the dynamic corrosive conditions prevalent in these systems. Oxidation-sulfidation interactions leading to accelerated metal wastage of components can occur owing to the presence of sorbent deposits on metal surface and/or the low-oxygen partial pressures in the exposure environment. A number of laboratory tests were conducted to examine the influence of deposit chemistry, gas chemistry, and alloy pretreatment on corrosion of high-chromium alloys, such as, Incoloy 800 and Type 310 stainless steel. Detailed chemical and physical analyses of spent-bed materials were made and correlated with the observed corrosion behavior of the alloys. A comparative analysis was made of the influence of bubbling-bed and circulating-bed deposits on corrosion of several candidate alloys. Finally, a comparison was made of the laboratory corrosion test data with the metal wastage information developed over the years in several FBC test facilities. 5 refs., 20 figs., 3 tabs.
- Research Organization:
- Argonne National Lab., IL (USA)
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 7160751
- Report Number(s):
- CONF-900107-2; ON: DE90007806
- Country of Publication:
- United States
- Language:
- English
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014000* -- Coal
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36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALKALINE EARTH METAL COMPOUNDS
ALLOY-FE46NI33CR21
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
AUSTENITIC STEELS
BUBBLES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CALCIUM SULFATES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
COAL
COMBUSTION PRODUCTS
COMBUSTORS
CORRELATIONS
CORROSION
CORROSION RESISTANT ALLOYS
DEPOSITS
ENERGY SOURCES
FLUIDIZED-BED COMBUSTORS
FLUIDS
FOSSIL FUELS
FUELS
GASES
HEAT EXCHANGERS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
INCOLOY 800
INCOLOY ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
NICKEL ALLOYS
OXIDES
OXYGEN COMPOUNDS
SCALING
STAINLESS STEEL-310
STAINLESS STEELS
STEEL-CR25NI20
STEELS
SULFATES
SULFIDATION
SULFUR COMPOUNDS
TITANIUM ADDITIONS
TITANIUM ALLOYS