Manufacturing of Fe-Cr-Al weld overlay coatings for high temperature applications

Teemu Sarikka, Risto Ilola, Hannu Hänninen, Rami Pohja, Satu Tuurna

Research output: Contribution to conferenceConference articleScientific

Abstract

Boiler and tubing materials used in biomass-fired energy production are susceptible to corrosion in severe corrosive environments caused by inorganic constituents such as alkali metals and chlorine at the operating temperatures. Alumina forming alloys have been considered as possible candidates in these applications. In this study, overlay welds with FeCrAl type consumables having a nominal Al content of 5.8% (Kanthal A1) and 10% (prototype consumable) were developed and produced. The overlay welds were manufactured on T22 steel (10CrMo9-10). The overlay welds were made with a single-wire or two-wire GTAW method. Performance of the welds was tested in 168 h potassium chloride (KCl) exposure tests at 600°C in as-welded condition and after 24 h pre-oxidation at 950°C. Aluminium distribution in the welds and the formed oxide layers in the KCl exposure were characterized with SEM. After the exposure tests the oxide scales were mainly iron and chromium oxides in samples of as-welded condition and aluminium oxide in samples of preoxidized condition
Original languageEnglish
Number of pages7
Publication statusPublished - 2012
MoE publication typeNot Eligible
Event4th International Conference on the Integrity of High Temperature Welds / 9th International Conference on Creep and Fatigue at Elevated Temperatures - London, United Kingdom
Duration: 25 Sep 201227 Sep 2012

Conference

Conference4th International Conference on the Integrity of High Temperature Welds / 9th International Conference on Creep and Fatigue at Elevated Temperatures
CountryUnited Kingdom
CityLondon
Period25/09/1227/09/12

Fingerprint

High temperature applications
Welds
Coatings
Oxides
Wire
Aluminum
Alkali metals
Tubing
Chlorine
Boilers
Potassium
Chromium
Biomass
Alumina
Corrosion
Iron
Oxidation
Scanning electron microscopy
Steel
Temperature

Keywords

  • Overlay welding
  • Fe-Cr-Al-alloys
  • oxidation

Cite this

Sarikka, T., Ilola, R., Hänninen, H., Pohja, R., & Tuurna, S. (2012). Manufacturing of Fe-Cr-Al weld overlay coatings for high temperature applications. Paper presented at 4th International Conference on the Integrity of High Temperature Welds / 9th International Conference on Creep and Fatigue at Elevated Temperatures, London, United Kingdom.
Sarikka, Teemu ; Ilola, Risto ; Hänninen, Hannu ; Pohja, Rami ; Tuurna, Satu. / Manufacturing of Fe-Cr-Al weld overlay coatings for high temperature applications. Paper presented at 4th International Conference on the Integrity of High Temperature Welds / 9th International Conference on Creep and Fatigue at Elevated Temperatures, London, United Kingdom.7 p.
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title = "Manufacturing of Fe-Cr-Al weld overlay coatings for high temperature applications",
abstract = "Boiler and tubing materials used in biomass-fired energy production are susceptible to corrosion in severe corrosive environments caused by inorganic constituents such as alkali metals and chlorine at the operating temperatures. Alumina forming alloys have been considered as possible candidates in these applications. In this study, overlay welds with FeCrAl type consumables having a nominal Al content of 5.8{\%} (Kanthal A1) and 10{\%} (prototype consumable) were developed and produced. The overlay welds were manufactured on T22 steel (10CrMo9-10). The overlay welds were made with a single-wire or two-wire GTAW method. Performance of the welds was tested in 168 h potassium chloride (KCl) exposure tests at 600°C in as-welded condition and after 24 h pre-oxidation at 950°C. Aluminium distribution in the welds and the formed oxide layers in the KCl exposure were characterized with SEM. After the exposure tests the oxide scales were mainly iron and chromium oxides in samples of as-welded condition and aluminium oxide in samples of preoxidized condition",
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author = "Teemu Sarikka and Risto Ilola and Hannu H{\"a}nninen and Rami Pohja and Satu Tuurna",
note = "Project code: 79889 FIMECC/DEMAPP 2012/AMA TEKES/MATEXON ; 4th International Conference on the Integrity of High Temperature Welds / 9th International Conference on Creep and Fatigue at Elevated Temperatures ; Conference date: 25-09-2012 Through 27-09-2012",
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Sarikka, T, Ilola, R, Hänninen, H, Pohja, R & Tuurna, S 2012, 'Manufacturing of Fe-Cr-Al weld overlay coatings for high temperature applications' Paper presented at 4th International Conference on the Integrity of High Temperature Welds / 9th International Conference on Creep and Fatigue at Elevated Temperatures, London, United Kingdom, 25/09/12 - 27/09/12, .

Manufacturing of Fe-Cr-Al weld overlay coatings for high temperature applications. / Sarikka, Teemu; Ilola, Risto; Hänninen, Hannu; Pohja, Rami; Tuurna, Satu.

2012. Paper presented at 4th International Conference on the Integrity of High Temperature Welds / 9th International Conference on Creep and Fatigue at Elevated Temperatures, London, United Kingdom.

Research output: Contribution to conferenceConference articleScientific

TY - CONF

T1 - Manufacturing of Fe-Cr-Al weld overlay coatings for high temperature applications

AU - Sarikka, Teemu

AU - Ilola, Risto

AU - Hänninen, Hannu

AU - Pohja, Rami

AU - Tuurna, Satu

N1 - Project code: 79889 FIMECC/DEMAPP 2012/AMA TEKES/MATEXON

PY - 2012

Y1 - 2012

N2 - Boiler and tubing materials used in biomass-fired energy production are susceptible to corrosion in severe corrosive environments caused by inorganic constituents such as alkali metals and chlorine at the operating temperatures. Alumina forming alloys have been considered as possible candidates in these applications. In this study, overlay welds with FeCrAl type consumables having a nominal Al content of 5.8% (Kanthal A1) and 10% (prototype consumable) were developed and produced. The overlay welds were manufactured on T22 steel (10CrMo9-10). The overlay welds were made with a single-wire or two-wire GTAW method. Performance of the welds was tested in 168 h potassium chloride (KCl) exposure tests at 600°C in as-welded condition and after 24 h pre-oxidation at 950°C. Aluminium distribution in the welds and the formed oxide layers in the KCl exposure were characterized with SEM. After the exposure tests the oxide scales were mainly iron and chromium oxides in samples of as-welded condition and aluminium oxide in samples of preoxidized condition

AB - Boiler and tubing materials used in biomass-fired energy production are susceptible to corrosion in severe corrosive environments caused by inorganic constituents such as alkali metals and chlorine at the operating temperatures. Alumina forming alloys have been considered as possible candidates in these applications. In this study, overlay welds with FeCrAl type consumables having a nominal Al content of 5.8% (Kanthal A1) and 10% (prototype consumable) were developed and produced. The overlay welds were manufactured on T22 steel (10CrMo9-10). The overlay welds were made with a single-wire or two-wire GTAW method. Performance of the welds was tested in 168 h potassium chloride (KCl) exposure tests at 600°C in as-welded condition and after 24 h pre-oxidation at 950°C. Aluminium distribution in the welds and the formed oxide layers in the KCl exposure were characterized with SEM. After the exposure tests the oxide scales were mainly iron and chromium oxides in samples of as-welded condition and aluminium oxide in samples of preoxidized condition

KW - Overlay welding

KW - Fe-Cr-Al-alloys

KW - oxidation

M3 - Conference article

ER -

Sarikka T, Ilola R, Hänninen H, Pohja R, Tuurna S. Manufacturing of Fe-Cr-Al weld overlay coatings for high temperature applications. 2012. Paper presented at 4th International Conference on the Integrity of High Temperature Welds / 9th International Conference on Creep and Fatigue at Elevated Temperatures, London, United Kingdom.