Studying the effect of the elements Ce and Cr on the high-temperature oxidation behavior of low-Cr steels

V.B. Trindade, U. Krupp, H.-J. Christ, Satu Tuurna, Liisa Heikinheimo, M. Arponen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

The oxidation behavior of steels containing low-Cr concentrations (0.5-2.25 wt.%) has been studied in laboratory air in the temperature range of 400-550oC. The oxidation rate of the steels were lower than that of pure iron, but higher than that of pure iron when a small amount of rare earth element cerium (0.03 wt.%) is added to the steel 2.25Cr1Mo. The mass change follows a nearly parabolic law for the case of pure iron and the steel without Ce addition, while linear behavior describes the oxygen uptake for the case of the steel 2.25Cr1Mo+0.03Ce. SEM cross section observations and thermodynamic calculations confirm that there is no wustite (FeO) formation during oxidation of pure iron and low-Cr steels at 550oC, whereas FeO might be formed in the oxide scale of 2.25Cr1Mo+0.03Ce at the same oxidation conditions (temperature, atmosphere and exposure time). By investigating the temperature for FeO stability, this study reveals that the temperature for FeO formation on pure iron is 568oC, for the steel 2.25Cr1Mo 589oC, and 471oC for the steel 2.25Cr1Mo+0.03Ce. This low value for the FeO stability temperature found for the steel 2.25Cr1Mo+0.03Ce explains why this steel oxidizes very fast at 550oC.
Original languageEnglish
Title of host publicationBALTICA VII - Life Management and Maintenance for Power Plants. Vol. 2
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages123-134
ISBN (Electronic)978-951-38-6318-0
ISBN (Print)978-951-38-6317-3
Publication statusPublished - 2007
MoE publication typeB3 Non-refereed article in conference proceedings
EventBALTICA VII - International Conference on Life Management and Main-tenance for Power Plants - Helsinki-Stockholm, Finland
Duration: 12 Jun 200714 Jun 2007

Publication series

SeriesVTT Symposium
Number247
ISSN0357-9387

Conference

ConferenceBALTICA VII - International Conference on Life Management and Main-tenance for Power Plants
CountryFinland
CityHelsinki-Stockholm
Period12/06/0714/06/07

Fingerprint

steel
oxidation
iron
temperature
effect
cerium
rare earth element
cross section
thermodynamics
scanning electron microscopy
oxide
oxygen
atmosphere
air

Cite this

Trindade, V. B., Krupp, U., Christ, H-J., Tuurna, S., Heikinheimo, L., & Arponen, M. (2007). Studying the effect of the elements Ce and Cr on the high-temperature oxidation behavior of low-Cr steels. In BALTICA VII - Life Management and Maintenance for Power Plants. Vol. 2 (pp. 123-134). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 247
Trindade, V.B. ; Krupp, U. ; Christ, H.-J. ; Tuurna, Satu ; Heikinheimo, Liisa ; Arponen, M. / Studying the effect of the elements Ce and Cr on the high-temperature oxidation behavior of low-Cr steels. BALTICA VII - Life Management and Maintenance for Power Plants. Vol. 2. Espoo : VTT Technical Research Centre of Finland, 2007. pp. 123-134 (VTT Symposium; No. 247).
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title = "Studying the effect of the elements Ce and Cr on the high-temperature oxidation behavior of low-Cr steels",
abstract = "The oxidation behavior of steels containing low-Cr concentrations (0.5-2.25 wt.{\%}) has been studied in laboratory air in the temperature range of 400-550oC. The oxidation rate of the steels were lower than that of pure iron, but higher than that of pure iron when a small amount of rare earth element cerium (0.03 wt.{\%}) is added to the steel 2.25Cr1Mo. The mass change follows a nearly parabolic law for the case of pure iron and the steel without Ce addition, while linear behavior describes the oxygen uptake for the case of the steel 2.25Cr1Mo+0.03Ce. SEM cross section observations and thermodynamic calculations confirm that there is no wustite (FeO) formation during oxidation of pure iron and low-Cr steels at 550oC, whereas FeO might be formed in the oxide scale of 2.25Cr1Mo+0.03Ce at the same oxidation conditions (temperature, atmosphere and exposure time). By investigating the temperature for FeO stability, this study reveals that the temperature for FeO formation on pure iron is 568oC, for the steel 2.25Cr1Mo 589oC, and 471oC for the steel 2.25Cr1Mo+0.03Ce. This low value for the FeO stability temperature found for the steel 2.25Cr1Mo+0.03Ce explains why this steel oxidizes very fast at 550oC.",
author = "V.B. Trindade and U. Krupp and H.-J. Christ and Satu Tuurna and Liisa Heikinheimo and M. Arponen",
year = "2007",
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Trindade, VB, Krupp, U, Christ, H-J, Tuurna, S, Heikinheimo, L & Arponen, M 2007, Studying the effect of the elements Ce and Cr on the high-temperature oxidation behavior of low-Cr steels. in BALTICA VII - Life Management and Maintenance for Power Plants. Vol. 2. VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 247, pp. 123-134, BALTICA VII - International Conference on Life Management and Main-tenance for Power Plants, Helsinki-Stockholm, Finland, 12/06/07.

Studying the effect of the elements Ce and Cr on the high-temperature oxidation behavior of low-Cr steels. / Trindade, V.B.; Krupp, U.; Christ, H.-J.; Tuurna, Satu; Heikinheimo, Liisa; Arponen, M.

BALTICA VII - Life Management and Maintenance for Power Plants. Vol. 2. Espoo : VTT Technical Research Centre of Finland, 2007. p. 123-134 (VTT Symposium; No. 247).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

TY - GEN

T1 - Studying the effect of the elements Ce and Cr on the high-temperature oxidation behavior of low-Cr steels

AU - Trindade, V.B.

AU - Krupp, U.

AU - Christ, H.-J.

AU - Tuurna, Satu

AU - Heikinheimo, Liisa

AU - Arponen, M.

PY - 2007

Y1 - 2007

N2 - The oxidation behavior of steels containing low-Cr concentrations (0.5-2.25 wt.%) has been studied in laboratory air in the temperature range of 400-550oC. The oxidation rate of the steels were lower than that of pure iron, but higher than that of pure iron when a small amount of rare earth element cerium (0.03 wt.%) is added to the steel 2.25Cr1Mo. The mass change follows a nearly parabolic law for the case of pure iron and the steel without Ce addition, while linear behavior describes the oxygen uptake for the case of the steel 2.25Cr1Mo+0.03Ce. SEM cross section observations and thermodynamic calculations confirm that there is no wustite (FeO) formation during oxidation of pure iron and low-Cr steels at 550oC, whereas FeO might be formed in the oxide scale of 2.25Cr1Mo+0.03Ce at the same oxidation conditions (temperature, atmosphere and exposure time). By investigating the temperature for FeO stability, this study reveals that the temperature for FeO formation on pure iron is 568oC, for the steel 2.25Cr1Mo 589oC, and 471oC for the steel 2.25Cr1Mo+0.03Ce. This low value for the FeO stability temperature found for the steel 2.25Cr1Mo+0.03Ce explains why this steel oxidizes very fast at 550oC.

AB - The oxidation behavior of steels containing low-Cr concentrations (0.5-2.25 wt.%) has been studied in laboratory air in the temperature range of 400-550oC. The oxidation rate of the steels were lower than that of pure iron, but higher than that of pure iron when a small amount of rare earth element cerium (0.03 wt.%) is added to the steel 2.25Cr1Mo. The mass change follows a nearly parabolic law for the case of pure iron and the steel without Ce addition, while linear behavior describes the oxygen uptake for the case of the steel 2.25Cr1Mo+0.03Ce. SEM cross section observations and thermodynamic calculations confirm that there is no wustite (FeO) formation during oxidation of pure iron and low-Cr steels at 550oC, whereas FeO might be formed in the oxide scale of 2.25Cr1Mo+0.03Ce at the same oxidation conditions (temperature, atmosphere and exposure time). By investigating the temperature for FeO stability, this study reveals that the temperature for FeO formation on pure iron is 568oC, for the steel 2.25Cr1Mo 589oC, and 471oC for the steel 2.25Cr1Mo+0.03Ce. This low value for the FeO stability temperature found for the steel 2.25Cr1Mo+0.03Ce explains why this steel oxidizes very fast at 550oC.

M3 - Conference article in proceedings

SN - 978-951-38-6317-3

T3 - VTT Symposium

SP - 123

EP - 134

BT - BALTICA VII - Life Management and Maintenance for Power Plants. Vol. 2

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Trindade VB, Krupp U, Christ H-J, Tuurna S, Heikinheimo L, Arponen M. Studying the effect of the elements Ce and Cr on the high-temperature oxidation behavior of low-Cr steels. In BALTICA VII - Life Management and Maintenance for Power Plants. Vol. 2. Espoo: VTT Technical Research Centre of Finland. 2007. p. 123-134. (VTT Symposium; No. 247).