Development of a Coal Ash Corrosivity Index for High Temperature Corrosion

[+] Author and Article Information
Jun-Ichi Shigeta, Yoshio Hamao, Hiroshi Aoki, Ichiro Kajigaya

Ishikawajima-Harima Heavy Industries Co., Ltd., Osogu-Ku, Yokohama, Japan

J. Eng. Mater. Technol 109(4), 299-305 (Oct 01, 1987) (7 pages) doi:10.1115/1.3225981 History: Received April 17, 1987; Online September 15, 2009


Current development of Advanced Steam Cycle coal-fired power plants requires superheater and reheater tubing alloys which can withstand severe conditions for high temperature corrosion. A corrosion equation to predict corrosion rates for candidate alloys has been developed by a study of deposits removed from steam generator tubes and from test probes installed in a boiler, supplemented by laboratory studies using synthetic coal ash. The corrosion equation predicts corrosion for a particular coal as a function of its content of sulfur, acid-soluble alkalies, and acid-soluble aklaline earths. Good agreement was obtained between the corrosion equation and 6000-hour tests using probes of TP347H and 17-14 CuMo.

Copyright © 1987 by ASME
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