Erosion of AISI 1018 steel and several thermal sprayed coatings under simulated in-bed tube erosion conditions of fluidized bed combustors

Conference · Sun Dec 31 00:00:00 EST 1995

OSTI ID:288005

Wang, B Q ^[1]; Lee, S W ^[2]

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1. Metalspray USA, Inc., Richmond, VA (United States). Metallurgical Lab.
2. Morgan State Univ., Baltimore, MD (United States). School of Engineering

A series of erosion tests was carried out on AISI 1018 low carbon steel and several thermal sprayed coating specimens at low elevated temperature (300 C) and low impact velocity ({approximately} 2.5 m/s) using a nozzle type laboratory erosion tester. Angular SiO{sub 2} quartz particles of average size 742 {micro}m were used as the erodent material for tests at three different impact angles of 30{degree}, 45{degree} and 90{degree} under generally oxidizing conditions for exposure periods up to 96 hours. Material wastage rates were determined from thickness loss measurements of the specimens. Test results were compared with erosion test results from higher velocity test conditions (30 m/s). The morphologies of the specimens were examined by scanning electron microscopy (SEM). It was found that there are some differences on erosion mechanism and behavior of steel and coatings under low velocity from those under high velocity. Also a significant change in the ranking of erosion resistance occurred when steel and coatings were tested under different velocities. The erosion behavior of coatings is related to their composition, microstructure rather than their hardness. The five coatings tested are: 75Cr{sub 3}C{sub 2}-25NiCr, Cr{sub 3}C{sub 2}, WC-17Co, Fe25Cr3B2Si, and 90Cr{sub 2}O{sub 3}6SiO{sub 2}4Al{sub 2}O{sub 3}.

• OSTI ID: 288005
• Report Number(s): CONF-950522-; ISBN 0-7918-1305-3; TRN: IM9639%%625
• Resource Relation: Conference: 13. international conference on fluidized-bed combustion, Orlando, FL (United States), 7-10 May 1995; Other Information: PBD: 1995; Related Information: Is Part Of 13. international conference on fluidized bed combustion: Proceedings. Volume 2; Heinschel, K.J. [ed.] [Air Products and Chemicals, Inc., Allentown, PA (United States)]; PB: 823 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
FLUIDIZED-BED COMBUSTORS
TUBES
EROSION
CARBON STEELS
PROTECTIVE COATINGS
CHROMIUM OXIDES
NICKEL ALLOYS
CHROMIUM ALLOYS
CHROMIUM CARBIDES
SILICON OXIDES
TUNGSTEN CARBIDES
COBALT
IRON BASE ALLOYS
BORON ALLOYS
SILICON ALLOYS
ALUMINIUM OXIDES
SPRAY COATING
WEIGHT
LOSSES
WEAR RESISTANCE
IMAGES