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Effect of Chromium Content on the Oxidation Behaviour of High-Speed Steels under Dry and Moist Air Environments
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Steam Oxidation of TP 347H FG in Power Plants
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Hot Corrosion and Steam Oxidation Properties of New Heat Resistant Steels for Ultra Super Critical Boilers
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The Relationship between High-Temperature Steam Oxidation and Hydrogen Dissolution in High-Chromium Ferritic Steels
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Steam Oxidation Testing of Coatings for Next Generation Steam Power Plant Components
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Oxidation Behavior of Pt+Hf-Modified γ-Ni +γ'-Ni3Al Alloys
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Hot Corrosion and Steam Oxidation Properties of New Heat Resistant Steels for Ultra Super Critical Boilers

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Abstract:

Achieving higher plant efficiency in thermal power plants is one of the major global challenges from the viewpoint of reducing carbon dioxide emission levels, particularly in coal-fired boilers, irrespective of the type of coal being burned. In recent times, it has been possible to increase the steam temperature in coal fired ultra supercritical (USC) plants without too much of a cost impact. The temperature has already been increased to 600 for main steam and 610 for reheat steam. The main enabling technology is the development of stronger high temperature materials such as newly developed high Cr ferritic steels and austenitic steels, capable of operating under high stresses at increasing high temperatures. Other key demands for those materials are hot corrosion resistance such as coal ash corrosion in superheater and reheater tubes and sulfidation of waterwall tubes, and steam oxidation resistance. This paper will mainly present the hot corrosion and steam oxidation properties of newly developed high strength heat resistant steels for their application to USC boilers and long-term experience in an actual plant.

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Periodical:

Materials Science Forum (Volumes 522-523)

Pages:

189-196

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.522-523.189

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Online since:

August 2006

Authors:

Yuji Fukuda, Masaru Shimizu

Keywords:

Austenitic Steel, CoAl, Ferritic Steel, Hot Corrosion, Piping, Reheater Tubing, Shot Blasting, Steam Oxidation, Sulfidation, Superheater Tubing, USC Boiler

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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