A corrosion mechanism for the fireside wastage of superheater materials in waste incinerators
Book
·
OSTI ID:509446
- Sumitomo Metal Industries, Ltd., Amagasaki (Japan)
- Babcock-Hitachi K.K., Kure (Japan)
- Ishikawajima-Harima Heavy Industries Co., Ltd., Tokyo (Japan)
- Mitsubishi Heavy Industries, Ltd., Yokohama (Japan)
- Japan Research and Development Center for Metals, Tokyo (Japan)
Heat of fusion of twenty-three boiler tube deposits taken from corrosion test probes in existing waste incinerators exposed at 550 C for 700 h and 3,000 h was measured by DSC in a simulated flue gas atmosphere. Heat of fusion was summed for up to 550 C, and the sum was considered to represent the relative amount of fused salts in the deposits at 550 C. The sum of heat of fusion was related to the corrosion rates of the corresponding corrosion probes of TP347H and Alloy 625. For ashes taken from the bottom portion of the tube deposits, the corrosion rates of TP347H and Alloy 625, exposed at 550 C for 3,000 h, were higher for ashes of greater sum of heat of fusion, suggesting that the corrosion of steels and alloys becomes more severe when the ashes contain greater amount of fused salt constituents on the surface side of the boiler tubes.
- OSTI ID:
- 509446
- Report Number(s):
- CONF-970332--
- Country of Publication:
- United States
- Language:
- English
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