Modelling Microstructural and Chemical Degradation of Ferritic Stainless Steels for SOFC Interconnects

Melissa Oum; James Andrews; Robert Steinberger-Wilckens

Modelling Microstructural and Chemical Degradation of Ferritic Stainless Steels for SOFC Interconnects

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

1 Citation (Scopus)

Abstract

Ferritic (FeCrX) alloys forming a protective chromium oxide layer (Cr2O3) are the preferred materials for the interconnect component in solid oxide fuel cells (SOFC).
Due to their oxidation rate in moist air, these alloys undergo degradation causing an increase in interconnect electrical contact resistance and formation of (poisonous) volatile chromium species. Developing coating agents and techniques that protect these alloys and lower their degradation rates is the current approach to extending SOFC lifetime .
In this paper we examine the oxidation behaviour of an uncoated ferritic stainless steel interconnect for a supposed SOFC system operating at 850oC.
A precursor numerical model with respect to the oxidation and evaporation kinetics of the steel has been developed. The model is able to predict the weight gain of the samples upon oxidation, the oxide film thickness, the volatilisation of chromium, and the useable lifetime of interconnects based on chromium depletion calculations.

Original language	English
Title of host publication	ECS Meeting Abstracts:
Subtitle of host publication	SOFC-XV: 15th International Symposium on Solid Oxide Fuel Cells July 23, 2017 - July 28, 2017 Hollywood, FL
Editors	Subhash Singhal
Place of Publication	Pennington
Publisher	Electrochemical Society Inc.
Number of pages	10
Volume	MA2017-03
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

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

SOFC
Corrosion
Steel
Chromium
Oxide Layer
protective coatings

ASJC Scopus subject areas

Mechanics of Materials
Energy Engineering and Power Technology
Renewable Energy, Sustainability and the Environment

Access to Document

http://ma.ecsdl.org/content/MA2017-03/1/100.shortLicence: None: All rights reserved

Cite this

Oum, M., Andrews, J., & Steinberger-Wilckens, R. (2017). Modelling Microstructural and Chemical Degradation of Ferritic Stainless Steels for SOFC Interconnects. In S. Singhal (Ed.), ECS Meeting Abstracts: SOFC-XV: 15th International Symposium on Solid Oxide Fuel Cells July 23, 2017 - July 28, 2017 Hollywood, FL (Vol. MA2017-03). Article MA2017-03 100 Electrochemical Society Inc.. http://ma.ecsdl.org/content/MA2017-03/1/100.short

Oum, Melissa ; Andrews, James ; Steinberger-Wilckens, Robert. / Modelling Microstructural and Chemical Degradation of Ferritic Stainless Steels for SOFC Interconnects. ECS Meeting Abstracts: SOFC-XV: 15th International Symposium on Solid Oxide Fuel Cells July 23, 2017 - July 28, 2017 Hollywood, FL. editor / Subhash Singhal. Vol. MA2017-03 Pennington : Electrochemical Society Inc., 2017.

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title = "Modelling Microstructural and Chemical Degradation of Ferritic Stainless Steels for SOFC Interconnects",

abstract = "Ferritic (FeCrX) alloys forming a protective chromium oxide layer (Cr2O3) are the preferred materials for the interconnect component in solid oxide fuel cells (SOFC). Due to their oxidation rate in moist air, these alloys undergo degradation causing an increase in interconnect electrical contact resistance and formation of (poisonous) volatile chromium species. Developing coating agents and techniques that protect these alloys and lower their degradation rates is the current approach to extending SOFC lifetime . In this paper we examine the oxidation behaviour of an uncoated ferritic stainless steel interconnect for a supposed SOFC system operating at 850oC. A precursor numerical model with respect to the oxidation and evaporation kinetics of the steel has been developed. The model is able to predict the weight gain of the samples upon oxidation, the oxide film thickness, the volatilisation of chromium, and the useable lifetime of interconnects based on chromium depletion calculations. ",

keywords = "SOFC, Corrosion, Steel, Chromium, Oxide Layer, protective coatings",

author = "Melissa Oum and James Andrews and Robert Steinberger-Wilckens",

year = "2017",

month = jul,

day = "23",

language = "English",

volume = "MA2017-03",

editor = "Subhash Singhal",

booktitle = "ECS Meeting Abstracts:",

publisher = "Electrochemical Society Inc.",

address = "United States",

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

url = "http://www.electrochem.org/sofc-xv",

}

Oum, M, Andrews, J & Steinberger-Wilckens, R 2017, Modelling Microstructural and Chemical Degradation of Ferritic Stainless Steels for SOFC Interconnects. in S Singhal (ed.), ECS Meeting Abstracts: SOFC-XV: 15th International Symposium on Solid Oxide Fuel Cells July 23, 2017 - July 28, 2017 Hollywood, FL. vol. MA2017-03, MA2017-03 100, Electrochemical Society Inc., Pennington, 15th International Symposium on Solid Oxide Fuel Cells, SOFC, 2017, Hollywood, United States, 23/07/17. <http://ma.ecsdl.org/content/MA2017-03/1/100.short>

Modelling Microstructural and Chemical Degradation of Ferritic Stainless Steels for SOFC Interconnects. / Oum, Melissa; Andrews, James ; Steinberger-Wilckens, Robert.
ECS Meeting Abstracts: SOFC-XV: 15th International Symposium on Solid Oxide Fuel Cells July 23, 2017 - July 28, 2017 Hollywood, FL. ed. / Subhash Singhal. Vol. MA2017-03 Pennington: Electrochemical Society Inc., 2017. MA2017-03 100.

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

TY - GEN

T1 - Modelling Microstructural and Chemical Degradation of Ferritic Stainless Steels for SOFC Interconnects

AU - Oum, Melissa

AU - Andrews, James

AU - Steinberger-Wilckens, Robert

PY - 2017/7/23

Y1 - 2017/7/23

N2 - Ferritic (FeCrX) alloys forming a protective chromium oxide layer (Cr2O3) are the preferred materials for the interconnect component in solid oxide fuel cells (SOFC). Due to their oxidation rate in moist air, these alloys undergo degradation causing an increase in interconnect electrical contact resistance and formation of (poisonous) volatile chromium species. Developing coating agents and techniques that protect these alloys and lower their degradation rates is the current approach to extending SOFC lifetime . In this paper we examine the oxidation behaviour of an uncoated ferritic stainless steel interconnect for a supposed SOFC system operating at 850oC. A precursor numerical model with respect to the oxidation and evaporation kinetics of the steel has been developed. The model is able to predict the weight gain of the samples upon oxidation, the oxide film thickness, the volatilisation of chromium, and the useable lifetime of interconnects based on chromium depletion calculations.

AB - Ferritic (FeCrX) alloys forming a protective chromium oxide layer (Cr2O3) are the preferred materials for the interconnect component in solid oxide fuel cells (SOFC). Due to their oxidation rate in moist air, these alloys undergo degradation causing an increase in interconnect electrical contact resistance and formation of (poisonous) volatile chromium species. Developing coating agents and techniques that protect these alloys and lower their degradation rates is the current approach to extending SOFC lifetime . In this paper we examine the oxidation behaviour of an uncoated ferritic stainless steel interconnect for a supposed SOFC system operating at 850oC. A precursor numerical model with respect to the oxidation and evaporation kinetics of the steel has been developed. The model is able to predict the weight gain of the samples upon oxidation, the oxide film thickness, the volatilisation of chromium, and the useable lifetime of interconnects based on chromium depletion calculations.

KW - SOFC

KW - Corrosion

KW - Steel

KW - Chromium

KW - Oxide Layer

KW - protective coatings

M3 - Conference contribution

VL - MA2017-03

BT - ECS Meeting Abstracts:

A2 - Singhal, Subhash

PB - Electrochemical Society Inc.

CY - Pennington

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

Y2 - 23 July 2017 through 28 July 2017

ER -

Oum M, Andrews J , Steinberger-Wilckens R. Modelling Microstructural and Chemical Degradation of Ferritic Stainless Steels for SOFC Interconnects. In Singhal S, editor, ECS Meeting Abstracts: SOFC-XV: 15th International Symposium on Solid Oxide Fuel Cells July 23, 2017 - July 28, 2017 Hollywood, FL. Vol. MA2017-03. Pennington: Electrochemical Society Inc. 2017. MA2017-03 100

Modelling Microstructural and Chemical Degradation of Ferritic Stainless Steels for SOFC Interconnects

Abstract

Conference

UN SDGs

Keywords

ASJC Scopus subject areas

Access to Document

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Cite this