Managing corrosion in biomass boilers: Benefits and limitations of coatings

Satu Tuurna, Tommi Varis, Kimmo Ruusuvuori, Stefan Holmström, Jorma Salonen, Pertti Auerkari, Tuomo Kinnunen, Patrik Yrjas, Risto Finne, Matti Nupponen, Ulla McNiven, Hannu Ahonen, Ari Kapulainen

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

    Abstract

    Oxidation and corrosion of materials in highly demanding applications is critical for longterm performance of materials used in power generation. Energy production in biomass fired boilers is increasing rapidly due to the advantages of CO2 neutrality and renewability. Fluidised bed combustors and grate fired boilers have proved the most reliable technologies for burning biomass since its fuel characteristics are variable. The fly ash of biomass is relatively corrosive due to its composition containing high concentrations of chemically active compounds of alkali, sulphur and chlorine, and it also may contain erosive components especially in the case of fluidised bed boilers. Due to the potential for severe chlorine induced corrosion, plant operating temperatures and efficiency must be limited. To overcome material wastage more alloyed materials are needed. The high cost and sometimes hard to manufacture bulk materials could be replaced with coatings, which can be applied on the more economic low alloy steel having the proper mechanical properties. The paper discusses the benefits and limitations of thermal sprayed coatings in biomass boilers. The applied examples have included iron and nickel based HVOF and arc sprayed coatings subjected to verification field testing in boiler testing under in aggressive biofuel conditions. The coatings have shown good corrosion resistance in long-term field tests.
    Original languageEnglish
    Title of host publicationBaltica VIII
    Subtitle of host publicationLife Management and Maintenance for Power Plants
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Pages22-36
    Volume2
    ISBN (Electronic)978-951-38-7594-7
    ISBN (Print)978-951-38-7593-2
    Publication statusPublished - 2010
    MoE publication typeB3 Non-refereed article in conference proceedings
    EventBALTICA VIII - International Conference on Life Management and Maintenance for Power Plants - Helsinki-Stockholm, Finland
    Duration: 18 May 201020 May 2010

    Publication series

    SeriesVTT Symposium
    Number265
    ISSN0357-9387

    Conference

    ConferenceBALTICA VIII - International Conference on Life Management and Maintenance for Power Plants
    CountryFinland
    CityHelsinki-Stockholm
    Period18/05/1020/05/10

    Fingerprint

    Boilers
    Biomass
    Corrosion
    Coatings
    Sprayed coatings
    Chlorine
    Testing
    Biofuels
    Combustors
    High strength steel
    Fly ash
    Power generation
    Corrosion resistance
    Sulfur
    Nickel
    Iron
    Oxidation
    Mechanical properties
    Economics
    Chemical analysis

    Cite this

    Tuurna, S., Varis, T., Ruusuvuori, K., Holmström, S., Salonen, J., Auerkari, P., ... Kapulainen, A. (2010). Managing corrosion in biomass boilers: Benefits and limitations of coatings. In Baltica VIII: Life Management and Maintenance for Power Plants (Vol. 2, pp. 22-36). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 265
    Tuurna, Satu ; Varis, Tommi ; Ruusuvuori, Kimmo ; Holmström, Stefan ; Salonen, Jorma ; Auerkari, Pertti ; Kinnunen, Tuomo ; Yrjas, Patrik ; Finne, Risto ; Nupponen, Matti ; McNiven, Ulla ; Ahonen, Hannu ; Kapulainen, Ari. / Managing corrosion in biomass boilers : Benefits and limitations of coatings. Baltica VIII: Life Management and Maintenance for Power Plants. Vol. 2 Espoo : VTT Technical Research Centre of Finland, 2010. pp. 22-36 (VTT Symposium; No. 265).
    @inproceedings{80962a1315cf45049e2fa62f132690c2,
    title = "Managing corrosion in biomass boilers: Benefits and limitations of coatings",
    abstract = "Oxidation and corrosion of materials in highly demanding applications is critical for longterm performance of materials used in power generation. Energy production in biomass fired boilers is increasing rapidly due to the advantages of CO2 neutrality and renewability. Fluidised bed combustors and grate fired boilers have proved the most reliable technologies for burning biomass since its fuel characteristics are variable. The fly ash of biomass is relatively corrosive due to its composition containing high concentrations of chemically active compounds of alkali, sulphur and chlorine, and it also may contain erosive components especially in the case of fluidised bed boilers. Due to the potential for severe chlorine induced corrosion, plant operating temperatures and efficiency must be limited. To overcome material wastage more alloyed materials are needed. The high cost and sometimes hard to manufacture bulk materials could be replaced with coatings, which can be applied on the more economic low alloy steel having the proper mechanical properties. The paper discusses the benefits and limitations of thermal sprayed coatings in biomass boilers. The applied examples have included iron and nickel based HVOF and arc sprayed coatings subjected to verification field testing in boiler testing under in aggressive biofuel conditions. The coatings have shown good corrosion resistance in long-term field tests.",
    author = "Satu Tuurna and Tommi Varis and Kimmo Ruusuvuori and Stefan Holmstr{\"o}m and Jorma Salonen and Pertti Auerkari and Tuomo Kinnunen and Patrik Yrjas and Risto Finne and Matti Nupponen and Ulla McNiven and Hannu Ahonen and Ari Kapulainen",
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    series = "VTT Symposium",
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    Tuurna, S, Varis, T, Ruusuvuori, K, Holmström, S, Salonen, J, Auerkari, P, Kinnunen, T, Yrjas, P, Finne, R, Nupponen, M, McNiven, U, Ahonen, H & Kapulainen, A 2010, Managing corrosion in biomass boilers: Benefits and limitations of coatings. in Baltica VIII: Life Management and Maintenance for Power Plants. vol. 2, VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 265, pp. 22-36, BALTICA VIII - International Conference on Life Management and Maintenance for Power Plants, Helsinki-Stockholm, Finland, 18/05/10.

    Managing corrosion in biomass boilers : Benefits and limitations of coatings. / Tuurna, Satu; Varis, Tommi; Ruusuvuori, Kimmo; Holmström, Stefan; Salonen, Jorma; Auerkari, Pertti; Kinnunen, Tuomo; Yrjas, Patrik; Finne, Risto; Nupponen, Matti; McNiven, Ulla; Ahonen, Hannu; Kapulainen, Ari.

    Baltica VIII: Life Management and Maintenance for Power Plants. Vol. 2 Espoo : VTT Technical Research Centre of Finland, 2010. p. 22-36 (VTT Symposium; No. 265).

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

    TY - GEN

    T1 - Managing corrosion in biomass boilers

    T2 - Benefits and limitations of coatings

    AU - Tuurna, Satu

    AU - Varis, Tommi

    AU - Ruusuvuori, Kimmo

    AU - Holmström, Stefan

    AU - Salonen, Jorma

    AU - Auerkari, Pertti

    AU - Kinnunen, Tuomo

    AU - Yrjas, Patrik

    AU - Finne, Risto

    AU - Nupponen, Matti

    AU - McNiven, Ulla

    AU - Ahonen, Hannu

    AU - Kapulainen, Ari

    PY - 2010

    Y1 - 2010

    N2 - Oxidation and corrosion of materials in highly demanding applications is critical for longterm performance of materials used in power generation. Energy production in biomass fired boilers is increasing rapidly due to the advantages of CO2 neutrality and renewability. Fluidised bed combustors and grate fired boilers have proved the most reliable technologies for burning biomass since its fuel characteristics are variable. The fly ash of biomass is relatively corrosive due to its composition containing high concentrations of chemically active compounds of alkali, sulphur and chlorine, and it also may contain erosive components especially in the case of fluidised bed boilers. Due to the potential for severe chlorine induced corrosion, plant operating temperatures and efficiency must be limited. To overcome material wastage more alloyed materials are needed. The high cost and sometimes hard to manufacture bulk materials could be replaced with coatings, which can be applied on the more economic low alloy steel having the proper mechanical properties. The paper discusses the benefits and limitations of thermal sprayed coatings in biomass boilers. The applied examples have included iron and nickel based HVOF and arc sprayed coatings subjected to verification field testing in boiler testing under in aggressive biofuel conditions. The coatings have shown good corrosion resistance in long-term field tests.

    AB - Oxidation and corrosion of materials in highly demanding applications is critical for longterm performance of materials used in power generation. Energy production in biomass fired boilers is increasing rapidly due to the advantages of CO2 neutrality and renewability. Fluidised bed combustors and grate fired boilers have proved the most reliable technologies for burning biomass since its fuel characteristics are variable. The fly ash of biomass is relatively corrosive due to its composition containing high concentrations of chemically active compounds of alkali, sulphur and chlorine, and it also may contain erosive components especially in the case of fluidised bed boilers. Due to the potential for severe chlorine induced corrosion, plant operating temperatures and efficiency must be limited. To overcome material wastage more alloyed materials are needed. The high cost and sometimes hard to manufacture bulk materials could be replaced with coatings, which can be applied on the more economic low alloy steel having the proper mechanical properties. The paper discusses the benefits and limitations of thermal sprayed coatings in biomass boilers. The applied examples have included iron and nickel based HVOF and arc sprayed coatings subjected to verification field testing in boiler testing under in aggressive biofuel conditions. The coatings have shown good corrosion resistance in long-term field tests.

    M3 - Conference article in proceedings

    SN - 978-951-38-7593-2

    VL - 2

    T3 - VTT Symposium

    SP - 22

    EP - 36

    BT - Baltica VIII

    PB - VTT Technical Research Centre of Finland

    CY - Espoo

    ER -

    Tuurna S, Varis T, Ruusuvuori K, Holmström S, Salonen J, Auerkari P et al. Managing corrosion in biomass boilers: Benefits and limitations of coatings. In Baltica VIII: Life Management and Maintenance for Power Plants. Vol. 2. Espoo: VTT Technical Research Centre of Finland. 2010. p. 22-36. (VTT Symposium; No. 265).