A metallurgical evaluation of clad alloy 800H tubing after 17 years of service in a coal fired utility boiler

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Journal of Materials Engineering; (USA)

DOI:https://doi.org/10.1007/BF02834160· OSTI ID:5157683

Ganesan, P; Tassen, C S ^[1]

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1. Inco Alloys International, Inc., Huntington, WV (US)

INCOLOY alloy 800H tubing clad with INCONEL alloy 671 was installed in a power generation station in 1967 and 1968. Sections of these tubes were removed periodically for metallurgical evaluation. The last section of tubing removed had been exposed for over 17 years in a boiler reheater section operating at 1005{sup 0}F (540{sup 0}C) and at a steam pressure of 475-500 psig (3.28-3.45 MPa). The alloy 800H provides water side corrosion resistance and the needed high temperature strength while the high chromium alloy 671 has good resistance to coal ash fire side corrosion. This paper describes the mechanical properties, microstructural stability, and the water side corrosion resistance of alloy 800H after 17 years of exposure. A brief summary of the performance of the cladding is also included.

• OSTI ID: 5157683
• Journal Information: Journal of Materials Engineering; (USA), Journal Name: Journal of Materials Engineering; (USA) Vol. 10:3; ISSN JMAEE; ISSN 0931-7058
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000 -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200103* -- Fossil-Fueled Power Plants-- Waste-Fueled Systems
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOY-FE46NI33CR21
ALLOY-NI51CR48
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
ASHES
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CLADDING
COAL
COMBUSTION
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
DEPOSITION
ENERGY SOURCES
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH TEMPERATURE
HYDROGEN COMPOUNDS
INCOLOY 800
INCOLOY ALLOYS
INCONEL 671
INCONEL ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
METALLURGY
NICKEL ALLOYS
NICKEL BASE ALLOYS
OXIDATION
OXYGEN COMPOUNDS
PERFORMANCE
POWER PLANTS
RESIDUES
SURFACE COATING
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
TITANIUM ADDITIONS
TITANIUM ALLOYS
TUBES
WATER