Role of Ash Deposits in the High Temperature Corrosion of Boiler Tubes

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Description

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 ... continued below

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2561 Kilobytes pages

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Covino, B.S., Jr.; Russell, J.H.; Cramer, S.D.; Holcomb, G.R.; Bullard, S.J.; Ziomek-Moroz, M. et al. March 16, 2003.

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Description

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. A shakedown test of a thermal gradient test apparatus was conducted at a metal/gas temperature of 450/670 C, a more severe environment than normally encountered in WTE waterwalls. Results showed that the corrosion rate under those conditions exceeds the isothermal corrosion rates at the same metal temperature by a factor of 2 or more.

Physical Description

2561 Kilobytes pages

Notes

publisher or author; OSTI as DE00821880

Source

  • Corrosion 2003, San Diego, CA (US), 03/16/2003--03/20/2003; Other Information: Paper No. 3718

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  • Report No.: DOE/ARC-2003-007
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 821880
  • Archival Resource Key: ark:/67531/metadc785790

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • March 16, 2003

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  • Dec. 3, 2015, 9:30 a.m.

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  • March 28, 2016, 8:57 p.m.

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Covino, B.S., Jr.; Russell, J.H.; Cramer, S.D.; Holcomb, G.R.; Bullard, S.J.; Ziomek-Moroz, M. et al. Role of Ash Deposits in the High Temperature Corrosion of Boiler Tubes, article, March 16, 2003; (digital.library.unt.edu/ark:/67531/metadc785790/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.