Erosion-corrosion of as-plasma-sprayed and laser-remelted NiCrAlY bond coats in working conditions of a coal-fired boiler

Journal Article · Tue Jan 15 00:00:00 EST 2008 · Corrosion (Houston)

OSTI ID:21004844

Sidhu, B S; Prakash, S ^[1]

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1. College of Engineering & Technology, Bathinda (India). Dept. of Mechanical Engineering

Ni-22Cr-10Al-1Y plasma spray coating has been formulated on boiler tube steels. namely, low-carbon steel ASTM SA210-Grade A1. 1Cr-0.5Mo steel ASTM SA213-T-11, and 2.25Cr-1Mo steel ASTM SA213-T-22. The coated steels also have been laser-remelted using a Nd:YAG laser. The degradation behavior of as-sprayed and laser-remelted coatings have been evaluated in actual conditions in a coal-fired boiler for 1,000 h at 755{sup o}C. The laser remelting has been found to be effective to increase the degradation resistance of plasma-sprayed boiler steels. ASTM SA213-T-22-coated and laser-remelted steel has proved to be most effective in resistance to degrading species.

• OSTI ID: 21004844
• Journal Information: Corrosion (Houston), Vol. 64, Issue 1; ISSN 0010-9312
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
36 MATERIALS SCIENCE
BOILERS
EROSION
CORROSION
SPRAYED COATINGS
STEELS
TUBES
MELTING
WEAR RESISTANCE
PROTECTIVE COATINGS