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).
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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.",
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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).