High temperature corrosion resistance of HVOF coatings in a NaCl-KCl-Na2SO4 salt

Maria Oksa, Satu Tuurna, Tommi Varis

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

Abstract

Thermal spray coatings can be used for high temperature corrosion protection of heat exchanger surfaces in power plant boilers. In this study, several thermal spray coatings with high chromium content were manufactured with HVOF (high velocity oxy-fuel) technique, and their mechanical properties and high temperature corrosion resistance were tested and analysed. The coating materials included NiCr, IN625 and iron based steel alloy with a nanoscale microstructure Nanosteel SHS9172. High temperature corrosion testing was made in NaCl-KCl-Na2SO4 salt with controlled H2O atmosphere, in temperatures 575 and 625 C. The effect of coating process and following characteristics of the coatings on high temperature corrosion protection properties was analysed. The corrosion test results of the coatings were compared to corrosion resistance of bulk materials (X20, Alloy 263 and Sanicro 25)
Original languageEnglish
Title of host publicationEuropean Corrosion Congress (EUROCORR 2012)
Subtitle of host publicationSafer World Through Better Corrosion Control
PublisherEuropean Federation of Corrosion EFC
Number of pages12
ISBN (Print)978-1-5108-3592-4
Publication statusPublished - 2012
MoE publication typeB3 Non-refereed article in conference proceedings
EventEuropean Corrosion Congress Eurocorr 2012 - Istanbul, Turkey
Duration: 9 Sep 201213 Sep 2012

Conference

ConferenceEuropean Corrosion Congress Eurocorr 2012
Abbreviated titleEurocorr 2012
CountryTurkey
CityIstanbul
Period9/09/1213/09/12

Fingerprint

Corrosion resistance
Salts
Coatings
Corrosion protection
Temperature
Corrosion
Alloy steel
Heat exchangers
Boilers
Chromium
Power plants
Protective atmospheres
Iron
Mechanical properties
Microstructure
Testing
Hot Temperature

Keywords

  • High temperature corrosion
  • coating
  • thermal spray
  • HVOF
  • biomass

Cite this

Oksa, M., Tuurna, S., & Varis, T. (2012). High temperature corrosion resistance of HVOF coatings in a NaCl-KCl-Na2SO4 salt. In European Corrosion Congress (EUROCORR 2012) : Safer World Through Better Corrosion Control European Federation of Corrosion EFC.
Oksa, Maria ; Tuurna, Satu ; Varis, Tommi. / High temperature corrosion resistance of HVOF coatings in a NaCl-KCl-Na2SO4 salt. European Corrosion Congress (EUROCORR 2012) : Safer World Through Better Corrosion Control . European Federation of Corrosion EFC, 2012.
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title = "High temperature corrosion resistance of HVOF coatings in a NaCl-KCl-Na2SO4 salt",
abstract = "Thermal spray coatings can be used for high temperature corrosion protection of heat exchanger surfaces in power plant boilers. In this study, several thermal spray coatings with high chromium content were manufactured with HVOF (high velocity oxy-fuel) technique, and their mechanical properties and high temperature corrosion resistance were tested and analysed. The coating materials included NiCr, IN625 and iron based steel alloy with a nanoscale microstructure Nanosteel SHS9172. High temperature corrosion testing was made in NaCl-KCl-Na2SO4 salt with controlled H2O atmosphere, in temperatures 575 and 625 C. The effect of coating process and following characteristics of the coatings on high temperature corrosion protection properties was analysed. The corrosion test results of the coatings were compared to corrosion resistance of bulk materials (X20, Alloy 263 and Sanicro 25)",
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Oksa, M, Tuurna, S & Varis, T 2012, High temperature corrosion resistance of HVOF coatings in a NaCl-KCl-Na2SO4 salt. in European Corrosion Congress (EUROCORR 2012) : Safer World Through Better Corrosion Control . European Federation of Corrosion EFC, European Corrosion Congress Eurocorr 2012, Istanbul, Turkey, 9/09/12.

High temperature corrosion resistance of HVOF coatings in a NaCl-KCl-Na2SO4 salt. / Oksa, Maria; Tuurna, Satu; Varis, Tommi.

European Corrosion Congress (EUROCORR 2012) : Safer World Through Better Corrosion Control . European Federation of Corrosion EFC, 2012.

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

TY - GEN

T1 - High temperature corrosion resistance of HVOF coatings in a NaCl-KCl-Na2SO4 salt

AU - Oksa, Maria

AU - Tuurna, Satu

AU - Varis, Tommi

N1 - Project code: 37397

PY - 2012

Y1 - 2012

N2 - Thermal spray coatings can be used for high temperature corrosion protection of heat exchanger surfaces in power plant boilers. In this study, several thermal spray coatings with high chromium content were manufactured with HVOF (high velocity oxy-fuel) technique, and their mechanical properties and high temperature corrosion resistance were tested and analysed. The coating materials included NiCr, IN625 and iron based steel alloy with a nanoscale microstructure Nanosteel SHS9172. High temperature corrosion testing was made in NaCl-KCl-Na2SO4 salt with controlled H2O atmosphere, in temperatures 575 and 625 C. The effect of coating process and following characteristics of the coatings on high temperature corrosion protection properties was analysed. The corrosion test results of the coatings were compared to corrosion resistance of bulk materials (X20, Alloy 263 and Sanicro 25)

AB - Thermal spray coatings can be used for high temperature corrosion protection of heat exchanger surfaces in power plant boilers. In this study, several thermal spray coatings with high chromium content were manufactured with HVOF (high velocity oxy-fuel) technique, and their mechanical properties and high temperature corrosion resistance were tested and analysed. The coating materials included NiCr, IN625 and iron based steel alloy with a nanoscale microstructure Nanosteel SHS9172. High temperature corrosion testing was made in NaCl-KCl-Na2SO4 salt with controlled H2O atmosphere, in temperatures 575 and 625 C. The effect of coating process and following characteristics of the coatings on high temperature corrosion protection properties was analysed. The corrosion test results of the coatings were compared to corrosion resistance of bulk materials (X20, Alloy 263 and Sanicro 25)

KW - High temperature corrosion

KW - coating

KW - thermal spray

KW - HVOF

KW - biomass

M3 - Conference article in proceedings

SN - 978-1-5108-3592-4

BT - European Corrosion Congress (EUROCORR 2012)

PB - European Federation of Corrosion EFC

ER -

Oksa M, Tuurna S, Varis T. High temperature corrosion resistance of HVOF coatings in a NaCl-KCl-Na2SO4 salt. In European Corrosion Congress (EUROCORR 2012) : Safer World Through Better Corrosion Control . European Federation of Corrosion EFC. 2012