Effective yttrium based coating for steel interconnects of solid oxide cells: Corrosion evaluation in steam-hydrogen atmosphere

S. Molin*, Å.H. Persson, T. L. Skafte, A. L. Smitshuysen, S.H. Jensen, K.B. Andersen, H. Xu, M. Chen, P. V. Hendriksen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This work describes manufacture, analysis and test of a new well conducting corrosion-protection coating that can be applied on steel types with high chromium content. Electrolytic deposition of yttrium salts is used to form thin (<100 nm) coatings on both flat steel sheets (material: Crofer 22 APU) and its properties are proven on woven wire-meshes (materials from two different sources: SUS316 and SUS316L). The oxide scale on the coated Crofer 22 APU sheet remains intact after 2000 h operation at 750 °C in H2 with 90% H2O. The corrosion rate at 750 °C of the coated Crofer 22 APU sheets is compared with that of uncoated samples and of samples with a commercial magneton sputtered CGO coating revealing that the coatings reduce the parabolic rate constant characteristic of the corrosion by a factor of 10 and 20 for the CGO and the Y, respectively.

The coated meshes also exhibit high corrosion resistance and long-term-stable low electrical resistance at 650 °C, both in 90% H2O in H2, and in air. In addition to the experimental work, Y–Cr–O2 phase diagrams are constructed illustrating the high stability of the YCrO3 phase (that forms during corrosion) over a wide temperature and pO2 range.

Original languageEnglish
Article number226814
JournalJournal of Power Sources
Volume440
Number of pages11
ISSN0378-7753
DOIs
Publication statusPublished - 2019

Keywords

  • Crofer 22 APU
  • SOEC
  • SOFC
  • High temperature corrosion
  • Protective coatings
  • Electrodeposition

Cite this

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title = "Effective yttrium based coating for steel interconnects of solid oxide cells: Corrosion evaluation in steam-hydrogen atmosphere",
abstract = "This work describes manufacture, analysis and test of a new well conducting corrosion-protection coating that can be applied on steel types with high chromium content. Electrolytic deposition of yttrium salts is used to form thin (<100 nm) coatings on both flat steel sheets (material: Crofer 22 APU) and its properties are proven on woven wire-meshes (materials from two different sources: SUS316 and SUS316L). The oxide scale on the coated Crofer 22 APU sheet remains intact after 2000 h operation at 750 °C in H2 with 90{\%} H2O. The corrosion rate at 750 °C of the coated Crofer 22 APU sheets is compared with that of uncoated samples and of samples with a commercial magneton sputtered CGO coating revealing that the coatings reduce the parabolic rate constant characteristic of the corrosion by a factor of 10 and 20 for the CGO and the Y, respectively.The coated meshes also exhibit high corrosion resistance and long-term-stable low electrical resistance at 650 °C, both in 90{\%} H2O in H2, and in air. In addition to the experimental work, Y–Cr–O2 phase diagrams are constructed illustrating the high stability of the YCrO3 phase (that forms during corrosion) over a wide temperature and pO2 range.",
keywords = "Crofer 22 APU, SOEC, SOFC, High temperature corrosion, Protective coatings, Electrodeposition",
author = "S. Molin and {\AA}.H. Persson and Skafte, {T. L.} and Smitshuysen, {A. L.} and S.H. Jensen and K.B. Andersen and H. Xu and M. Chen and Hendriksen, {P. V.}",
year = "2019",
doi = "10.1016/j.jpowsour.2019.226814",
language = "English",
volume = "440",
journal = "Journal of Power Sources",
issn = "0378-7753",
publisher = "Elsevier",

}

Effective yttrium based coating for steel interconnects of solid oxide cells: Corrosion evaluation in steam-hydrogen atmosphere. / Molin, S.; Persson, Å.H.; Skafte, T. L.; Smitshuysen, A. L.; Jensen, S.H.; Andersen, K.B.; Xu, H.; Chen, M.; Hendriksen, P. V.

In: Journal of Power Sources, Vol. 440, 226814, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Effective yttrium based coating for steel interconnects of solid oxide cells: Corrosion evaluation in steam-hydrogen atmosphere

AU - Molin, S.

AU - Persson, Å.H.

AU - Skafte, T. L.

AU - Smitshuysen, A. L.

AU - Jensen, S.H.

AU - Andersen, K.B.

AU - Xu, H.

AU - Chen, M.

AU - Hendriksen, P. V.

PY - 2019

Y1 - 2019

N2 - This work describes manufacture, analysis and test of a new well conducting corrosion-protection coating that can be applied on steel types with high chromium content. Electrolytic deposition of yttrium salts is used to form thin (<100 nm) coatings on both flat steel sheets (material: Crofer 22 APU) and its properties are proven on woven wire-meshes (materials from two different sources: SUS316 and SUS316L). The oxide scale on the coated Crofer 22 APU sheet remains intact after 2000 h operation at 750 °C in H2 with 90% H2O. The corrosion rate at 750 °C of the coated Crofer 22 APU sheets is compared with that of uncoated samples and of samples with a commercial magneton sputtered CGO coating revealing that the coatings reduce the parabolic rate constant characteristic of the corrosion by a factor of 10 and 20 for the CGO and the Y, respectively.The coated meshes also exhibit high corrosion resistance and long-term-stable low electrical resistance at 650 °C, both in 90% H2O in H2, and in air. In addition to the experimental work, Y–Cr–O2 phase diagrams are constructed illustrating the high stability of the YCrO3 phase (that forms during corrosion) over a wide temperature and pO2 range.

AB - This work describes manufacture, analysis and test of a new well conducting corrosion-protection coating that can be applied on steel types with high chromium content. Electrolytic deposition of yttrium salts is used to form thin (<100 nm) coatings on both flat steel sheets (material: Crofer 22 APU) and its properties are proven on woven wire-meshes (materials from two different sources: SUS316 and SUS316L). The oxide scale on the coated Crofer 22 APU sheet remains intact after 2000 h operation at 750 °C in H2 with 90% H2O. The corrosion rate at 750 °C of the coated Crofer 22 APU sheets is compared with that of uncoated samples and of samples with a commercial magneton sputtered CGO coating revealing that the coatings reduce the parabolic rate constant characteristic of the corrosion by a factor of 10 and 20 for the CGO and the Y, respectively.The coated meshes also exhibit high corrosion resistance and long-term-stable low electrical resistance at 650 °C, both in 90% H2O in H2, and in air. In addition to the experimental work, Y–Cr–O2 phase diagrams are constructed illustrating the high stability of the YCrO3 phase (that forms during corrosion) over a wide temperature and pO2 range.

KW - Crofer 22 APU

KW - SOEC

KW - SOFC

KW - High temperature corrosion

KW - Protective coatings

KW - Electrodeposition

U2 - 10.1016/j.jpowsour.2019.226814

DO - 10.1016/j.jpowsour.2019.226814

M3 - Journal article

VL - 440

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

M1 - 226814

ER -