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RESEARCH PAPERS

Corrosion of Superheaters and Reheaters of Pulverized-Coal-Fired Boilers, II

[+] Author and Article Information
Carl Cain, Wharton Nelson

Combustion Engineering, Inc., Kreisinger Development Laboratory, Chattanooga, Tenn.

J. Eng. Power 83(4), 468-474 (Oct 01, 1961) (7 pages) doi:10.1115/1.3673237 History: Received August 08, 1960; Online January 10, 2012

Abstract

This paper deals with studies of high-temperature fireside corrosion of reheater and superheater tubes in pulverized-coal-fired boilers. Factors affecting the temperature range and rate of corrosion by molten complex alkali sulfates are described. The influence of sulfides, produced by reaction of complex sulfates with tube metal, on corrosion rate is discussed. The similarity of coal-ash to oil-ash corrosion mechanism is brought out. Methods for distinguishing liquid phase from gas-phase corrosion on ferritic alloys are presented.

Copyright © 1961 by ASME
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