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Role of Ash Deposits in the High Temperature Conrrosion of Boiler Tubes.

DE2004821880

Publication Date	2004
Personal Author	Covino, B. S.; Russell, J. H.; Cramer, S. D.; Holcomb, G. R.; Bullard, S. J.; Ziomek-Moroz, M.; Matthes, S. A.
Page Count	16
Abstract	Ash deposits cause accelerated corrosion of waterwall boiler tubes in waste to energy (WTE) incinerators. To study this effect, a series of experiments were planned to determine the mechanism of corrosion of carbon steel boiler tubes under ash deposits. Results reported here were for carbon steel tubes exposed to an environment consisting of O(sub 2), CO(sub 2), N(sub 2), and water vapor. Future experiments will include HCl and SO(sub 2). Test procedures included both isothermal and thermal gradient tests. Temperatures ranged from 300 C to 510 C for the isothermal tests and a metal/gas temperature of 450/670 C for the thermal gradient test. Initial results indicated that increasing temperature caused the isothermal corrosion rates of ash-covered samples to increase.
Keywords	Ashes Boilers Corrosion Carbon steels Tubes Deposits Fossil-fuel power plants Incinerators Industrial wastes Chemical composition Thermal gradients Temperature effects
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Department of Energy, Albany, OR. Albany Research Center.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200503

Role of Ash Deposits in the High Temperature Conrrosion of Boiler Tubes.

Role of Ash Deposits in the High Temperature Conrrosion of Boiler Tubes.
DE2004821880

Publication Date	2004
Personal Author	Covino, B. S.; Russell, J. H.; Cramer, S. D.; Holcomb, G. R.; Bullard, S. J.; Ziomek-Moroz, M.; Matthes, S. A.
Page Count	16
Abstract	Ash deposits cause accelerated corrosion of waterwall boiler tubes in waste to energy (WTE) incinerators. To study this effect, a series of experiments were planned to determine the mechanism of corrosion of carbon steel boiler tubes under ash deposits. Results reported here were for carbon steel tubes exposed to an environment consisting of O(sub 2), CO(sub 2), N(sub 2), and water vapor. Future experiments will include HCl and SO(sub 2). Test procedures included both isothermal and thermal gradient tests. Temperatures ranged from 300 C to 510 C for the isothermal tests and a metal/gas temperature of 450/670 C for the thermal gradient test. Initial results indicated that increasing temperature caused the isothermal corrosion rates of ash-covered samples to increase.
Keywords	Ashes Boilers Corrosion Carbon steels Tubes Deposits Fossil-fuel power plants Incinerators Industrial wastes Chemical composition Thermal gradients Temperature effects
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Department of Energy, Albany, OR. Albany Research Center.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200503