Development of a coal ash corrosivity index for high temperature corrosion

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6572281

Shigeta, J I; Hamao, Y; Aoki, H; Kajigaya, I

Current development of Advanced Steam Cycle coal-fired power plants requires superheater and reheater tubing alloys which can withstand severe conditions for high temperature corrosion. A corrosion equation to predict corrosion rates for candidate alloys has been developed by a study of deposits removed from steam generator tubes and from test probes installed in a boiler, supplemented by laboratory studies using synthetic coal ash. The corrosion equation predicts corrosion for a particular coal as a function of its content of sulfur, acid-soluble alkalies, and acid-soluble alkaline earths. Good agreement was obtained between the corrosion equation and 6000-hour tests using probes of TP347H and 17-14 CuMo.

• OSTI ID: 6572281
• Report Number(s): CONF-861005-
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
20 FOSSIL-FUELED POWER PLANTS
200104 -- Fossil-Fueled Power Plants-- Components
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
AEROSOL WASTES
ALKALI METALS
ALKALINE EARTH METALS
ALLOYS
ASHES
BOILERS
CALCULATION METHODS
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL
COMBUSTION PRODUCTS
CORROSION
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
DEPOSITION
ELEMENTS
ENERGY SOURCES
FLY ASH
FORECASTING
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
MATERIALS
MATERIALS TESTING
METALS
POWER PLANTS
PROBES
RESIDUES
STEAM GENERATORS
SULFUR CONTENT
TESTING
THERMAL POWER PLANTS
VAPOR GENERATORS
WASTES