High-temperature corrosion problems in steam boilers

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Proc. - Electrochem. Soc.; (United States)

OSTI ID:5259672

Stringer, J

There are essentially three distinct high temperature corrosion problems in fossil fuel fired steam boilers. These are: (1) corrosion of the superheaters and reheaters due to the deposition of fuel impurities, principally alkali metal sulfates in the case of coal-fired boilers and vanadium pentoxide in the case of oil-fired units. (2) Corrosion of the waterwalls in the furnace enclosure, due to the establishment of low oxygen activity regions near the walls. (3) Although steam-side oxidation in the superheater and reheater does not cause undue metal loss, the exfoliation of the magnetite can cause problems, including blockage of tubes and erosion of steam turbine components. These three areas are reviewed, and current state of knowledge on the mechanisms and methods of control is summarized.

• Research Organization: Electric Power Research Institute, Palo Alto, California
• OSTI ID: 5259672
• Journal Information: Proc. - Electrochem. Soc.; (United States), Journal Name: Proc. - Electrochem. Soc.; (United States) Vol. 83-5; ISSN PESOD
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200100* -- Fossil-Fueled Power Plants-- Power Plants & Power Generation
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
APPROPRIATE TECHNOLOGY
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
CORROSION
CORROSIVE EFFECTS
ENERGY SOURCES
EROSION
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
HEATERS
MACHINERY
MATERIALS
OXIDATION
PETROLEUM
POWER PLANTS
STEAM GENERATORS
STEAM TURBINES
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY
VAPOR GENERATORS