Corrosion Behavior of 304 Stainless Steel in High Temperature, Hydrogenated Water

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The corrosion behavior of an austenitic stainless steel (UNS S30400) has been characterized in a 10,000 hour test conducted in hydrogenated, ammoniated water at 260 C. The corrosion kinetics were observed to follow a parabolic rate dependency, the parabolic rate constant being determined by chemical descaling to be 1.16 mg dm{sup -2} hr{sup -1/2}. X-ray photoelectron spectroscopy, in combination with argon ion milling and target factor analysis, was applied to provide an independent estimate of the rate constant that agreed with the gravimetric result. Based on the distribution of the three oxidized alloying constituents (Fe, Cr, Ni) with respect to ... continued below

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5905 Kilobytes pages

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Ziemniak, S.E. & Hanson, M. May 4, 2001.

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  • Lockheed Martin
    Publisher Info: Lockheed Martin Corporation, Schenectady, NY 12301 (United States)
    Place of Publication: Schenectady, New York

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Description

The corrosion behavior of an austenitic stainless steel (UNS S30400) has been characterized in a 10,000 hour test conducted in hydrogenated, ammoniated water at 260 C. The corrosion kinetics were observed to follow a parabolic rate dependency, the parabolic rate constant being determined by chemical descaling to be 1.16 mg dm{sup -2} hr{sup -1/2}. X-ray photoelectron spectroscopy, in combination with argon ion milling and target factor analysis, was applied to provide an independent estimate of the rate constant that agreed with the gravimetric result. Based on the distribution of the three oxidized alloying constituents (Fe, Cr, Ni) with respect to depth and elemental state, it was found that: (a) corrosion occurs in a non-selective manner, and (b) the corrosion film consists of two spinel oxide layers--a ferrite-based outer layer (Ni{sub 0.2}Fe{sub 0.8})(Fe{sub 0.95}Cr{sub 0.05}){sub 2}O{sub 4} on top of a chromite-based inner layer (Ni{sub 0.2}Fe{sub 0.8})(Cr{sub 0.7}Fe{sub 0.3}){sub 2}O{sub 4}. These compositions agree closely with the solvi phases created by immiscibility in the Fe{sub 3}O{sub 4}-FeCr{sub 2}O{sub 4} binary, implying that immiscibility plays an important role in the phase separation process.

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5905 Kilobytes pages

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OSTI as DE00821681

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  • Other Information: PBD: 4 May 2001

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  • Report No.: LM-01K046
  • Grant Number: AC12-00SN39357
  • DOI: 10.2172/821681 | External Link
  • Office of Scientific & Technical Information Report Number: 821681
  • Archival Resource Key: ark:/67531/metadc788464

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  • May 4, 2001

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  • Dec. 3, 2015, 9:30 a.m.

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  • April 28, 2016, 8:43 p.m.

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Ziemniak, S.E. & Hanson, M. Corrosion Behavior of 304 Stainless Steel in High Temperature, Hydrogenated Water, report, May 4, 2001; Schenectady, New York. (digital.library.unt.edu/ark:/67531/metadc788464/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.