Characterization of pack cemented Ni2Al3 coating exposed to KCl(s) induced corrosion at 600 °C

Kristian Vinter Dahl*, A. Slomian, Trine Nybo Lomholt, Saeed Kiamehr, Flemming Bjerg Grumsen, Melanie Montgomery, T. Jonsson

*Corresponding author for this work

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Abstract

Oxidation of Ni2Al3 produced by pack aluminizing of pure nickel was studied with and without 0.10 mg cm−2 KCl(s) deposit in an environment containing 5% O2, 40% H2O and 55% N2 at 600 °C for up to 168 h. Oxide microstructure and composition was investigated by SEM/EDX, BIB, TEM and GDOES. Oxidised Ni2Al3 shows minimal weight gain, while adding KCl results in a small weight loss consistent with evaporation of KCl. On the surface of samples exposed to the gas environment only, a 30 nm oxide of Al oxide was present, but where KCl was present as deposit, 50–250 nm thick nodules form that are enriched in K, O and Al.
Original languageEnglish
JournalMaterials at High Temperatures
Volume35
Issue number1-3
Pages (from-to)267-274
ISSN0960-3409
DOIs
Publication statusPublished - 2018

Keywords

  • Nickel aluminide
  • KCI
  • High temperature corrosion
  • 600 °C
  • Electron microscopy

Cite this

Dahl, Kristian Vinter ; Slomian, A. ; Lomholt, Trine Nybo ; Kiamehr, Saeed ; Grumsen, Flemming Bjerg ; Montgomery, Melanie ; Jonsson, T. / Characterization of pack cemented Ni2Al3 coating exposed to KCl(s) induced corrosion at 600 °C. In: Materials at High Temperatures. 2018 ; Vol. 35, No. 1-3. pp. 267-274.
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abstract = "Oxidation of Ni2Al3 produced by pack aluminizing of pure nickel was studied with and without 0.10 mg cm−2 KCl(s) deposit in an environment containing 5{\%} O2, 40{\%} H2O and 55{\%} N2 at 600 °C for up to 168 h. Oxide microstructure and composition was investigated by SEM/EDX, BIB, TEM and GDOES. Oxidised Ni2Al3 shows minimal weight gain, while adding KCl results in a small weight loss consistent with evaporation of KCl. On the surface of samples exposed to the gas environment only, a 30 nm oxide of Al oxide was present, but where KCl was present as deposit, 50–250 nm thick nodules form that are enriched in K, O and Al.",
keywords = "Nickel aluminide, KCI, High temperature corrosion, 600 °C, Electron microscopy",
author = "Dahl, {Kristian Vinter} and A. Slomian and Lomholt, {Trine Nybo} and Saeed Kiamehr and Grumsen, {Flemming Bjerg} and Melanie Montgomery and T. Jonsson",
year = "2018",
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language = "English",
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pages = "267--274",
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Characterization of pack cemented Ni2Al3 coating exposed to KCl(s) induced corrosion at 600 °C. / Dahl, Kristian Vinter; Slomian, A.; Lomholt, Trine Nybo; Kiamehr, Saeed; Grumsen, Flemming Bjerg; Montgomery, Melanie; Jonsson, T.

In: Materials at High Temperatures, Vol. 35, No. 1-3, 2018, p. 267-274.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Characterization of pack cemented Ni2Al3 coating exposed to KCl(s) induced corrosion at 600 °C

AU - Dahl, Kristian Vinter

AU - Slomian, A.

AU - Lomholt, Trine Nybo

AU - Kiamehr, Saeed

AU - Grumsen, Flemming Bjerg

AU - Montgomery, Melanie

AU - Jonsson, T.

PY - 2018

Y1 - 2018

N2 - Oxidation of Ni2Al3 produced by pack aluminizing of pure nickel was studied with and without 0.10 mg cm−2 KCl(s) deposit in an environment containing 5% O2, 40% H2O and 55% N2 at 600 °C for up to 168 h. Oxide microstructure and composition was investigated by SEM/EDX, BIB, TEM and GDOES. Oxidised Ni2Al3 shows minimal weight gain, while adding KCl results in a small weight loss consistent with evaporation of KCl. On the surface of samples exposed to the gas environment only, a 30 nm oxide of Al oxide was present, but where KCl was present as deposit, 50–250 nm thick nodules form that are enriched in K, O and Al.

AB - Oxidation of Ni2Al3 produced by pack aluminizing of pure nickel was studied with and without 0.10 mg cm−2 KCl(s) deposit in an environment containing 5% O2, 40% H2O and 55% N2 at 600 °C for up to 168 h. Oxide microstructure and composition was investigated by SEM/EDX, BIB, TEM and GDOES. Oxidised Ni2Al3 shows minimal weight gain, while adding KCl results in a small weight loss consistent with evaporation of KCl. On the surface of samples exposed to the gas environment only, a 30 nm oxide of Al oxide was present, but where KCl was present as deposit, 50–250 nm thick nodules form that are enriched in K, O and Al.

KW - Nickel aluminide

KW - KCI

KW - High temperature corrosion

KW - 600 °C

KW - Electron microscopy

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DO - 10.1080/09603409.2017.1392112

M3 - Journal article

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EP - 274

JO - Materials at High Temperatures

JF - Materials at High Temperatures

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ER -