Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    The Role of Tungsten on the Phase Transformation Kinetics and its Correlation with the Localized Corrosion Resistance of 25Cr Super Duplex Stainless Steels.

    79632.pdf (3.534Mb)
    Access Status
    Open access
    Authors
    Torres, Cristian
    Hazarabedian, Maria Sofia
    Quadir, Zakaria
    Johnsen, Roy
    Iannuzzi, Mariano
    Date
    2020
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Torres, C. and Hazarabedian, M.S. and Quadir, Z. and Johnsen, R. and Iannuzzi, M. 2020. The Role of Tungsten on the Phase Transformation Kinetics and its Correlation with the Localized Corrosion Resistance of 25Cr Super Duplex Stainless Steels. Journal of The Electrochemical Society. 167 (8): Article ID 081510.
    Source Title
    Journal of The Electrochemical Society
    DOI
    10.1149/1945-7111/ab90af
    Additional URLs
    http://creativecommons.org/licenses/by/4.0
    ISSN
    0013-4651
    Faculty
    Faculty of Science and Engineering
    School
    WASM: Minerals, Energy and Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/79550
    Collection
    • Curtin Research Publications
    Abstract

    Super Duplex Stainless Steels (SDSS) have excellent corrosion resistance due to their high concentration of alloying elements like Cr, Mo, and N. There is still, however, disagreement on the role of tungsten in the corrosion resistance of stainless steels. In this regard, the influence of tungsten on tertiary phase precipitation kinetics remains a chief source of controversy. In this study, three different SDSS with different tungsten contents have been investigated, namely, UNS S32750 (W-free), S32760 (0.6 wt% W), and S39274 (2.1 wt% W). Different isothermal aging conditions were studied, followed by microstructure characterization using scanning electron microscopy, energy dispersive X-ray spectroscopy, electron backscatter diffraction, and transmission electron microscopy to quantify the type and volume fraction of tertiary phases and intermetallic compounds. Time-Temperature-Transformation-Corrosion maps were constructed by quantifying the changes in pitting corrosion resistance caused by the precipitation of incremental amounts of deleterious phases. Results showed that 2.1 wt% W additions retarded the precipitation kinetics of all tertiary phases—including σ-phase—favoring the formation of χ-phase. Both χ- and σ-phase affected corrosion resistance, reducing the critical pitting temperature by 10 °C–20 °C at concentrations well below 1 vol%.

    Related items

    Showing items related by title, author, creator and subject.

    • Effect of Tungsten on the Pitting and Crevice Corrosion Resistance of Type 25Cr Super Duplex Stainless Steels
      Iannuzzi, Mariano; Haugan, E.; Næss, M.; Torres Rodriguez, C.; Johnsen, R. (2016)
      The oil and gas industry regularly uses Type 25Cr super duplex stainless steels (SDSS) for components exposed to seawater and hydrocarbon environments in topside facilities, downhole, and subsea equipment. Much debate ...
    • Effect of Microstructure on The Corrosion Resistance of Duplex Stainless Steels: Materials Performance Maps
      Iannuzzi, Mariano; Bernås, M.; Westermann, I.; Lauritsen, C.; Johnsen, R. (2017)
      Although duplex stainless steels are extensively used in oil and gas production due to their excellent combination of mechanical properties and corrosion resistance, they are susceptible to precipitation of deleterious ...
    • Effect of tungsten on the precipitation kinetics and localized corrosion resistance of super duplex stainless steels
      Bernås, M.; Westermann, I.; Johnsen, R.; Torres, C.; Jernberg, A.; Qvale, A.; Iannuzzi, Mariano (2018)
      © 2018 by NACE International. Although extensively used in oil and gas production due to their excellent combination of mechanical properties and corrosion resistance, 25Cr super duplex stainless steels (SDSSs) are ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.