Coatings for high temperature corrosion protection in advanced power plants

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    Abstract

    When aiming to decrease of greenhouse gas emissions and higher cost-efficiency, power plants would benefit from increased efficiency. Advanced power plants are aiming for up to 750°C steam temperatures. Higher steam temperatures will set higher requirements to tube materials, as especially difficult fuels can cause severe corrosion conditions. Biomass and waste include chlorides, sulfates and heavy metals, such as NaCl, KCl, K2SO4, Pb and Zn, that can substantially accelerate the corrosion even at lower temperatures. Corrosion protection properties of thermal spray coatings were validated in a co-fired boiler using biomass, coal and solid recovered fuel. Material testing was performed with a temperature controlled probe at 550 and 750°C for 3000 hours. Corrosion performance of six high velocity oxy-fuel (HVOF) coatings, FeCr, Ni46Cr, Ni26Cr, NiCrAlY and Al2O3, were evaluated, and a ferritic steel T92 and a nickel based alloy 740H were applied as reference materials. Maximum corrosion rates varied from 0.01 mm/y of Ni-based coatings to 0.4 mm/y of T92 at 550°C and from 0.1 mm/y of A740H to 0.5 mm/y of Fe-based coating at 750°C. The nickel-based coatings and the ceramic Al2O3 coating gave excellent protection to the ferritic steel at 550°C and sufficient protection at 750°C.
    Original languageEnglish
    Title of host publicationBaltica X
    Subtitle of host publicationInternational Conference on Life Management and Maintenance for Power Plants
    EditorsPertti Auerkari
    PublisherVTT Technical Research Centre of Finland
    Number of pages11
    ISBN (Electronic)978-951-38-8436-9, 978-951-38-8435-2
    Publication statusPublished - 2016
    MoE publication typeA4 Article in a conference publication
    EventBALTICA X - International Conference on Life Management and Maintenance for Power Plants - Cruise, Helsinki-Stockholm, Finland
    Duration: 7 Jun 20169 Jun 2016

    Publication series

    SeriesVTT Technology
    Volume261

    Conference

    ConferenceBALTICA X - International Conference on Life Management and Maintenance for Power Plants
    Abbreviated titleBaltica X
    CountryFinland
    CityHelsinki-Stockholm
    Period7/06/169/06/16

    Fingerprint

    Corrosion protection
    Power plants
    Coatings
    Ferritic steel
    Corrosion
    Biomass
    Steam
    Temperature
    Nickel
    Ceramic coatings
    Materials testing
    Corrosion rate
    Gas emissions
    Greenhouse gases
    Heavy metals
    Boilers
    Coal
    Costs

    Cite this

    Oksa, M., & Metsäjoki, J. (2016). Coatings for high temperature corrosion protection in advanced power plants. In P. Auerkari (Ed.), Baltica X: International Conference on Life Management and Maintenance for Power Plants VTT Technical Research Centre of Finland. VTT Technology, Vol.. 261
    Oksa, Maria ; Metsäjoki, Jarkko. / Coatings for high temperature corrosion protection in advanced power plants. Baltica X: International Conference on Life Management and Maintenance for Power Plants. editor / Pertti Auerkari. VTT Technical Research Centre of Finland, 2016. (VTT Technology, Vol. 261).
    @inproceedings{9167b7ec583c4676b1a1d8f4161d21a3,
    title = "Coatings for high temperature corrosion protection in advanced power plants",
    abstract = "When aiming to decrease of greenhouse gas emissions and higher cost-efficiency, power plants would benefit from increased efficiency. Advanced power plants are aiming for up to 750°C steam temperatures. Higher steam temperatures will set higher requirements to tube materials, as especially difficult fuels can cause severe corrosion conditions. Biomass and waste include chlorides, sulfates and heavy metals, such as NaCl, KCl, K2SO4, Pb and Zn, that can substantially accelerate the corrosion even at lower temperatures. Corrosion protection properties of thermal spray coatings were validated in a co-fired boiler using biomass, coal and solid recovered fuel. Material testing was performed with a temperature controlled probe at 550 and 750°C for 3000 hours. Corrosion performance of six high velocity oxy-fuel (HVOF) coatings, FeCr, Ni46Cr, Ni26Cr, NiCrAlY and Al2O3, were evaluated, and a ferritic steel T92 and a nickel based alloy 740H were applied as reference materials. Maximum corrosion rates varied from 0.01 mm/y of Ni-based coatings to 0.4 mm/y of T92 at 550°C and from 0.1 mm/y of A740H to 0.5 mm/y of Fe-based coating at 750°C. The nickel-based coatings and the ceramic Al2O3 coating gave excellent protection to the ferritic steel at 550°C and sufficient protection at 750°C.",
    author = "Maria Oksa and Jarkko Mets{\"a}joki",
    year = "2016",
    language = "English",
    series = "VTT Technology",
    publisher = "VTT Technical Research Centre of Finland",
    editor = "Pertti Auerkari",
    booktitle = "Baltica X",
    address = "Finland",

    }

    Oksa, M & Metsäjoki, J 2016, Coatings for high temperature corrosion protection in advanced power plants. in P Auerkari (ed.), Baltica X: International Conference on Life Management and Maintenance for Power Plants. VTT Technical Research Centre of Finland, VTT Technology, vol. 261, BALTICA X - International Conference on Life Management and Maintenance for Power Plants, Helsinki-Stockholm, Finland, 7/06/16.

    Coatings for high temperature corrosion protection in advanced power plants. / Oksa, Maria; Metsäjoki, Jarkko.

    Baltica X: International Conference on Life Management and Maintenance for Power Plants. ed. / Pertti Auerkari. VTT Technical Research Centre of Finland, 2016. (VTT Technology, Vol. 261).

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    TY - GEN

    T1 - Coatings for high temperature corrosion protection in advanced power plants

    AU - Oksa, Maria

    AU - Metsäjoki, Jarkko

    PY - 2016

    Y1 - 2016

    N2 - When aiming to decrease of greenhouse gas emissions and higher cost-efficiency, power plants would benefit from increased efficiency. Advanced power plants are aiming for up to 750°C steam temperatures. Higher steam temperatures will set higher requirements to tube materials, as especially difficult fuels can cause severe corrosion conditions. Biomass and waste include chlorides, sulfates and heavy metals, such as NaCl, KCl, K2SO4, Pb and Zn, that can substantially accelerate the corrosion even at lower temperatures. Corrosion protection properties of thermal spray coatings were validated in a co-fired boiler using biomass, coal and solid recovered fuel. Material testing was performed with a temperature controlled probe at 550 and 750°C for 3000 hours. Corrosion performance of six high velocity oxy-fuel (HVOF) coatings, FeCr, Ni46Cr, Ni26Cr, NiCrAlY and Al2O3, were evaluated, and a ferritic steel T92 and a nickel based alloy 740H were applied as reference materials. Maximum corrosion rates varied from 0.01 mm/y of Ni-based coatings to 0.4 mm/y of T92 at 550°C and from 0.1 mm/y of A740H to 0.5 mm/y of Fe-based coating at 750°C. The nickel-based coatings and the ceramic Al2O3 coating gave excellent protection to the ferritic steel at 550°C and sufficient protection at 750°C.

    AB - When aiming to decrease of greenhouse gas emissions and higher cost-efficiency, power plants would benefit from increased efficiency. Advanced power plants are aiming for up to 750°C steam temperatures. Higher steam temperatures will set higher requirements to tube materials, as especially difficult fuels can cause severe corrosion conditions. Biomass and waste include chlorides, sulfates and heavy metals, such as NaCl, KCl, K2SO4, Pb and Zn, that can substantially accelerate the corrosion even at lower temperatures. Corrosion protection properties of thermal spray coatings were validated in a co-fired boiler using biomass, coal and solid recovered fuel. Material testing was performed with a temperature controlled probe at 550 and 750°C for 3000 hours. Corrosion performance of six high velocity oxy-fuel (HVOF) coatings, FeCr, Ni46Cr, Ni26Cr, NiCrAlY and Al2O3, were evaluated, and a ferritic steel T92 and a nickel based alloy 740H were applied as reference materials. Maximum corrosion rates varied from 0.01 mm/y of Ni-based coatings to 0.4 mm/y of T92 at 550°C and from 0.1 mm/y of A740H to 0.5 mm/y of Fe-based coating at 750°C. The nickel-based coatings and the ceramic Al2O3 coating gave excellent protection to the ferritic steel at 550°C and sufficient protection at 750°C.

    M3 - Conference article in proceedings

    T3 - VTT Technology

    BT - Baltica X

    A2 - Auerkari, Pertti

    PB - VTT Technical Research Centre of Finland

    ER -

    Oksa M, Metsäjoki J. Coatings for high temperature corrosion protection in advanced power plants. In Auerkari P, editor, Baltica X: International Conference on Life Management and Maintenance for Power Plants. VTT Technical Research Centre of Finland. 2016. (VTT Technology, Vol. 261).