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.
Development of a Coal Ash Corrosivity Index for High Temperature Corrosion
Shigeta, J., Hamao, Y., Aoki, H., and Kajigaya, I. (October 1, 1987). "Development of a Coal Ash Corrosivity Index for High Temperature Corrosion." ASME. J. Eng. Mater. Technol. October 1987; 109(4): 299–305. https://doi.org/10.1115/1.3225981
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