Corrosion performance of alloys in TVA's 20MW AFBC pilot plant

Conference · · TMS (The Metallurgical Society) Paper Selection; (USA)

OSTI ID:5394462

Sethi, V K; Robinson-Wilson, D; Ganesan, P ^[1]

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1. Univ. of Kentucky, Lexington (USA)

The TVA's 20MW AFBC Pilot Plant located in Paducah, Kentucky, is one of the largest combustors to employ commercial steam temperature and pressure design and fabrication specifications suitable for utility boilers. The TVA and the Institute for Mining and Minerals Research are jointly conducting a materials corrosion performance evaluation program at the Pilot Plant. The objectives of the program are: (1) to provide surveillance to aid in predicting material degradation or failure prior to plant operations being affected, and (2) to generate additional materials performance data for the design of commercial-sized AFBC plants. As a part of this program uncooled corrosion coupons of various engineering alloys are being exposed in the bed area of the combustor. To date, two short term exposures have been concluded, one {approximately}558h exposure involved underbed feed and the other {approximately}1287h exposure involved overbed feed. The alloy performance was evaluated by weight loss determinations, and by microstructural examination of the polished cross-sections of the exposed alloys coupons. The corrosion performance of various corrosion resistant and heat resistant wrought and cast alloys is discussed. The effects of the feed system, crevice effects and the potential for erosion/corrosion synergism in the AFBC are also discussed.

• OSTI ID: 5394462
• Report Number(s): CONF-840909--
• Conference Information: Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Journal Volume: 56
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ATMOSPHERIC PRESSURE
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
CORROSION
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
ENERGY SOURCES
EROSION
FEDERAL REGION IV
FLUIDIZED BED BOILERS
FLUIDIZED-BED COMBUSTION
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
KENTUCKY
LOSSES
MATERIALS
MATERIALS TESTING
MICROSTRUCTURE
NATIONAL ORGANIZATIONS
NORTH AMERICA
OXIDATION
PILOT PLANTS
STEAM GENERATION PLANTS
TENNESSEE VALLEY AUTHORITY
TESTING
THERMOCHEMICAL PROCESSES
US ORGANIZATIONS
USA
WEIGHT