Oxidation resistance of 9-12% Cr steels: effect of rare earth surface treatment

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Medium Cr steels have been used in fossil fired power plants for many years because of their excellent high temperature stability and mechanical properties. The environment in a fossil fired power plant is extremely aggressive in terms of corrosion, especially oxidation. This is only accelerated as the operating temperature increases to 650C and beyond. For any new steel to be qualified for power plant use, in addition to adequate strength at the operating temperature, material wastage from all corrosion processes must be kept to a minimum acceptable level. The use of medium Cr steels provides a means to improve overall ... continued below

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Dogan, Omer N.; Alman, David A. & Jablonski, Paul D. February 1, 2005.

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Medium Cr steels have been used in fossil fired power plants for many years because of their excellent high temperature stability and mechanical properties. The environment in a fossil fired power plant is extremely aggressive in terms of corrosion, especially oxidation. This is only accelerated as the operating temperature increases to 650C and beyond. For any new steel to be qualified for power plant use, in addition to adequate strength at the operating temperature, material wastage from all corrosion processes must be kept to a minimum acceptable level. The use of medium Cr steels provides a means to improve overall corrosion resistance. Three medium Cr are under development for use as high temperature power plant steels: 0.08C-(9-12)Cr-1.2Ni-0.7Mo-3.0Cu-3.0Co-0.5Ti. Oxidation tests were performed on the steels for times greater than 1000 hours in order to determine the oxidation kinetics and extent of material wastage. Also, rare earth oxides were incorporated into the outer surface layers of the steels to see if the oxidation resistance could be improved. These results will be compared to current power plant steels.

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Not published - slide presentation available only

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  • 134th TMS Annual Meeting & Exposition, San Francisco, CA, Feb. 13-17, 2005 (The Minerals, Metals & Materials Society); Related Information: Presentation only. Abstract published in program.

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  • Report No.: DOE/ARC-2005-068
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 899240
  • Archival Resource Key: ark:/67531/metadc884278

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  • February 1, 2005

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 4, 2016, 2:10 p.m.

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Dogan, Omer N.; Alman, David A. & Jablonski, Paul D. Oxidation resistance of 9-12% Cr steels: effect of rare earth surface treatment, article, February 1, 2005; Albany, Oregon. (digital.library.unt.edu/ark:/67531/metadc884278/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.