Effect of Alloy Composition on the Oxidation Behaviour and Cr Vaporisation of High-Cr Steels for SOFC Cathode Air Preheater

Kun Zhang; Jong-Eun Hong; Robert Steinberger-Wilckens

Effect of Alloy Composition on the Oxidation Behaviour and Cr Vaporisation of High-Cr Steels for SOFC Cathode Air Preheater

Kun Zhang, Jong-Eun Hong, Robert Steinberger-Wilckens

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

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Abstract

We investigated the capability of aluminised and alumina-forming alloys to reduce the Cr vaporisation and increase the corrosion resistance by the growth and formation of alumina scale. The Cr evaporation tests have been performed for Inconel 625, AluChrom 318, SS309 and aluminised SS309 by applying a denuder technique at 850 °C with 6 L/min airflow and 3 vol% H2O to simulate the cathode atmosphere in SOFC. Chemical analysis of the oxide scales formed was subsequently studied by XRD and SEM/EDX. Inconel 625 and uncoated SS309 exhibited relatively higher Cr evaporation due to a Cr-rich oxide layer, in comparison with other materials. The chromium evaporation of uncoated SS309 was dramatically decreased by aluminising. The experiments showed that Cr retention of the aluminised surface of SS309 is comparable to that of alumina-forming steel, AluChrom 318, over 168 hours. However, spallation of PVD applied alumina scales was detected for aluminised SS309 after 1000 hours oxidation.

Original language	English
Title of host publication	Proceedings of SOFC XV
Editors	Subhash C. Singhal, T. Kawada
Place of Publication	Pennington, NJ, U.S.A.
Publisher	Electrochemical Society Inc.
Pages	1641-1652
Volume	78
Edition	1
ISBN (Electronic)	978-1-62332-457-5
ISBN (Print)	978-1-60768-815-0
Publication status	Published - 23 Jul 2017
Event	15th International Symposium on Solid Oxide Fuel Cells, SOFC, 2017 - Hollywood, FL, U.S.A., Hollywood, United States Duration: 23 Jul 2017 → 28 Jul 2017 http://www.electrochem.org/sofc-xv

Publication series

Name	ECS Transactions
Publisher	ECS
Number	1
Volume	78

Conference

Conference	15th International Symposium on Solid Oxide Fuel Cells, SOFC, 2017
Abbreviated title	SOFC XV
Country/Territory	United States
City	Hollywood
Period	23/07/17 → 28/07/17
Internet address	http://www.electrochem.org/sofc-xv

Keywords

SOFC
heat exchanger
corrosion
chromium

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Metals and Alloys
Surfaces, Coatings and Films

Access to Document

ESCT Manuscript_Kun Zhang_University of Birmingham_UK_pdfAccepted author manuscript, 1.07 MBLicence: None: All rights reserved

Cite this

@inproceedings{0680d1350b07488b98dd65ceeac54cc2,

title = "Effect of Alloy Composition on the Oxidation Behaviour and Cr Vaporisation of High-Cr Steels for SOFC Cathode Air Preheater",

abstract = "We investigated the capability of aluminised and alumina-forming alloys to reduce the Cr vaporisation and increase the corrosion resistance by the growth and formation of alumina scale. The Cr evaporation tests have been performed for Inconel 625, AluChrom 318, SS309 and aluminised SS309 by applying a denuder technique at 850 °C with 6 L/min airflow and 3 vol% H2O to simulate the cathode atmosphere in SOFC. Chemical analysis of the oxide scales formed was subsequently studied by XRD and SEM/EDX. Inconel 625 and uncoated SS309 exhibited relatively higher Cr evaporation due to a Cr-rich oxide layer, in comparison with other materials. The chromium evaporation of uncoated SS309 was dramatically decreased by aluminising. The experiments showed that Cr retention of the aluminised surface of SS309 is comparable to that of alumina-forming steel, AluChrom 318, over 168 hours. However, spallation of PVD applied alumina scales was detected for aluminised SS309 after 1000 hours oxidation.",

keywords = "SOFC, heat exchanger, corrosion, chromium",

author = "Kun Zhang and Jong-Eun Hong and Robert Steinberger-Wilckens",

year = "2017",

month = jul,

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isbn = "978-1-60768-815-0",

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series = "ECS Transactions",

publisher = "Electrochemical Society Inc.",

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pages = "1641--1652",

editor = "Singhal, {Subhash C.} and T. Kawada",

booktitle = "Proceedings of SOFC XV",

address = "United States",

edition = "1",

note = "15th International Symposium on Solid Oxide Fuel Cells, SOFC, 2017, SOFC XV ; Conference date: 23-07-2017 Through 28-07-2017",

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Zhang, K, Hong, J-E & Steinberger-Wilckens, R 2017, Effect of Alloy Composition on the Oxidation Behaviour and Cr Vaporisation of High-Cr Steels for SOFC Cathode Air Preheater. in SC Singhal & T Kawada (eds), Proceedings of SOFC XV. 1 edn, vol. 78, ECS Transactions, no. 1, vol. 78, Electrochemical Society Inc., Pennington, NJ, U.S.A., pp. 1641-1652, 15th International Symposium on Solid Oxide Fuel Cells, SOFC, 2017, Hollywood, United States, 23/07/17.

Effect of Alloy Composition on the Oxidation Behaviour and Cr Vaporisation of High-Cr Steels for SOFC Cathode Air Preheater. / Zhang, Kun; Hong, Jong-Eun; Steinberger-Wilckens, Robert.
Proceedings of SOFC XV. ed. / Subhash C. Singhal; T. Kawada. Vol. 78 1. ed. Pennington, NJ, U.S.A.: Electrochemical Society Inc., 2017. p. 1641-1652 (ECS Transactions; Vol. 78, No. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Effect of Alloy Composition on the Oxidation Behaviour and Cr Vaporisation of High-Cr Steels for SOFC Cathode Air Preheater

AU - Zhang, Kun

AU - Hong, Jong-Eun

AU - Steinberger-Wilckens, Robert

PY - 2017/7/23

Y1 - 2017/7/23

N2 - We investigated the capability of aluminised and alumina-forming alloys to reduce the Cr vaporisation and increase the corrosion resistance by the growth and formation of alumina scale. The Cr evaporation tests have been performed for Inconel 625, AluChrom 318, SS309 and aluminised SS309 by applying a denuder technique at 850 °C with 6 L/min airflow and 3 vol% H2O to simulate the cathode atmosphere in SOFC. Chemical analysis of the oxide scales formed was subsequently studied by XRD and SEM/EDX. Inconel 625 and uncoated SS309 exhibited relatively higher Cr evaporation due to a Cr-rich oxide layer, in comparison with other materials. The chromium evaporation of uncoated SS309 was dramatically decreased by aluminising. The experiments showed that Cr retention of the aluminised surface of SS309 is comparable to that of alumina-forming steel, AluChrom 318, over 168 hours. However, spallation of PVD applied alumina scales was detected for aluminised SS309 after 1000 hours oxidation.

AB - We investigated the capability of aluminised and alumina-forming alloys to reduce the Cr vaporisation and increase the corrosion resistance by the growth and formation of alumina scale. The Cr evaporation tests have been performed for Inconel 625, AluChrom 318, SS309 and aluminised SS309 by applying a denuder technique at 850 °C with 6 L/min airflow and 3 vol% H2O to simulate the cathode atmosphere in SOFC. Chemical analysis of the oxide scales formed was subsequently studied by XRD and SEM/EDX. Inconel 625 and uncoated SS309 exhibited relatively higher Cr evaporation due to a Cr-rich oxide layer, in comparison with other materials. The chromium evaporation of uncoated SS309 was dramatically decreased by aluminising. The experiments showed that Cr retention of the aluminised surface of SS309 is comparable to that of alumina-forming steel, AluChrom 318, over 168 hours. However, spallation of PVD applied alumina scales was detected for aluminised SS309 after 1000 hours oxidation.

KW - SOFC

KW - heat exchanger

KW - corrosion

KW - chromium

M3 - Conference contribution

SN - 978-1-60768-815-0

VL - 78

T3 - ECS Transactions

SP - 1641

EP - 1652

BT - Proceedings of SOFC XV

A2 - Singhal, Subhash C.

A2 - Kawada, T.

PB - Electrochemical Society Inc.

CY - Pennington, NJ, U.S.A.

T2 - 15th International Symposium on Solid Oxide Fuel Cells, SOFC, 2017

Y2 - 23 July 2017 through 28 July 2017

ER -

Effect of Alloy Composition on the Oxidation Behaviour and Cr Vaporisation of High-Cr Steels for SOFC Cathode Air Preheater

Abstract

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Keywords

ASJC Scopus subject areas

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