Corrosion Testing of Thermal Spray Coatings in a Biomass Co-Firing Power Plant

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Large-scale use of biomass and recycled fuel is increasing in energy production due to climate and energy targets. A 40% cut in greenhouse gas emission compared to 1990 levels and at least a 27% share of renewable energy consumption are set in EU Energy Strategy 2030. Burning fuels with high content of corrosive species such as chlorine and heavy metals causes deterioration of boiler components, shortened lifetime, limited availability of a plant and hence higher maintenance and investment costs and lower thermal and economic efficiency. Coatings can be applied to protect the critical boiler components against high temperature corrosion. In this study, five thermal spray coatings were tested in an actual biomass co-firing boiler for 1300 h with a measurement probe. The coatings were analyzed after the exposure by metallographic means and scanning electron microscope/energy-dispersive X-ray spectroscope (SEM/EDX). The deposits formed on the specimens were analyzed by X-ray fluorescence. At 550 °C, the coatings showed excellent corrosion performance compared to reference material ferritic steel T92. At 750 °C, tube material A263 together with NiCr and NiCrTi had the highest corrosion resistance. To conclude, thermal spray coatings can offer substantial corrosion protection in biomass and recycled fuel burning power plants.
Original languageEnglish
Article number65
JournalCoatings
Volume6
Issue number4
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Fingerprint

Power plants
Biomass
Corrosion
Coatings
Testing
Boilers
Boiler firing
X rays
Ferritic steel
Corrosion protection
Gas emissions
Greenhouse gases
Chlorine
Heavy metals
Deterioration
Corrosion resistance
Electron microscopes
Energy utilization
Deposits
Fluorescence

Keywords

  • thermal spray
  • coating
  • corrosion
  • high temperature
  • protection
  • boiler

Cite this

@article{3a0e0d6347d049d397dd460a1e7bd7d8,
title = "Corrosion Testing of Thermal Spray Coatings in a Biomass Co-Firing Power Plant",
abstract = "Large-scale use of biomass and recycled fuel is increasing in energy production due to climate and energy targets. A 40{\%} cut in greenhouse gas emission compared to 1990 levels and at least a 27{\%} share of renewable energy consumption are set in EU Energy Strategy 2030. Burning fuels with high content of corrosive species such as chlorine and heavy metals causes deterioration of boiler components, shortened lifetime, limited availability of a plant and hence higher maintenance and investment costs and lower thermal and economic efficiency. Coatings can be applied to protect the critical boiler components against high temperature corrosion. In this study, five thermal spray coatings were tested in an actual biomass co-firing boiler for 1300 h with a measurement probe. The coatings were analyzed after the exposure by metallographic means and scanning electron microscope/energy-dispersive X-ray spectroscope (SEM/EDX). The deposits formed on the specimens were analyzed by X-ray fluorescence. At 550 °C, the coatings showed excellent corrosion performance compared to reference material ferritic steel T92. At 750 °C, tube material A263 together with NiCr and NiCrTi had the highest corrosion resistance. To conclude, thermal spray coatings can offer substantial corrosion protection in biomass and recycled fuel burning power plants.",
keywords = "thermal spray, coating, corrosion, high temperature, protection, boiler",
author = "Maria Oksa and Jarkko Mets{\"a}joki and Janne K{\"a}rki",
year = "2016",
doi = "10.3390/coatings6040065",
language = "English",
volume = "6",
journal = "Coatings",
issn = "2079-6412",
publisher = "MDPI",
number = "4",

}

Corrosion Testing of Thermal Spray Coatings in a Biomass Co-Firing Power Plant. / Oksa, Maria; Metsäjoki, Jarkko; Kärki, Janne.

In: Coatings, Vol. 6, No. 4, 65, 2016.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Corrosion Testing of Thermal Spray Coatings in a Biomass Co-Firing Power Plant

AU - Oksa, Maria

AU - Metsäjoki, Jarkko

AU - Kärki, Janne

PY - 2016

Y1 - 2016

N2 - Large-scale use of biomass and recycled fuel is increasing in energy production due to climate and energy targets. A 40% cut in greenhouse gas emission compared to 1990 levels and at least a 27% share of renewable energy consumption are set in EU Energy Strategy 2030. Burning fuels with high content of corrosive species such as chlorine and heavy metals causes deterioration of boiler components, shortened lifetime, limited availability of a plant and hence higher maintenance and investment costs and lower thermal and economic efficiency. Coatings can be applied to protect the critical boiler components against high temperature corrosion. In this study, five thermal spray coatings were tested in an actual biomass co-firing boiler for 1300 h with a measurement probe. The coatings were analyzed after the exposure by metallographic means and scanning electron microscope/energy-dispersive X-ray spectroscope (SEM/EDX). The deposits formed on the specimens were analyzed by X-ray fluorescence. At 550 °C, the coatings showed excellent corrosion performance compared to reference material ferritic steel T92. At 750 °C, tube material A263 together with NiCr and NiCrTi had the highest corrosion resistance. To conclude, thermal spray coatings can offer substantial corrosion protection in biomass and recycled fuel burning power plants.

AB - Large-scale use of biomass and recycled fuel is increasing in energy production due to climate and energy targets. A 40% cut in greenhouse gas emission compared to 1990 levels and at least a 27% share of renewable energy consumption are set in EU Energy Strategy 2030. Burning fuels with high content of corrosive species such as chlorine and heavy metals causes deterioration of boiler components, shortened lifetime, limited availability of a plant and hence higher maintenance and investment costs and lower thermal and economic efficiency. Coatings can be applied to protect the critical boiler components against high temperature corrosion. In this study, five thermal spray coatings were tested in an actual biomass co-firing boiler for 1300 h with a measurement probe. The coatings were analyzed after the exposure by metallographic means and scanning electron microscope/energy-dispersive X-ray spectroscope (SEM/EDX). The deposits formed on the specimens were analyzed by X-ray fluorescence. At 550 °C, the coatings showed excellent corrosion performance compared to reference material ferritic steel T92. At 750 °C, tube material A263 together with NiCr and NiCrTi had the highest corrosion resistance. To conclude, thermal spray coatings can offer substantial corrosion protection in biomass and recycled fuel burning power plants.

KW - thermal spray

KW - coating

KW - corrosion

KW - high temperature

KW - protection

KW - boiler

U2 - 10.3390/coatings6040065

DO - 10.3390/coatings6040065

M3 - Article

VL - 6

JO - Coatings

JF - Coatings

SN - 2079-6412

IS - 4

M1 - 65

ER -