Corrosion Behavior of Crofer 22APU for Metallic Interconnects in Single and Dual Atmosphere Exposures at 1073 K

• Authors: M. Stygar , K. Matsuda , S. Lee , T. Brylewski
• Languages of publication: EN

Abstracts

EN

To determine the impact of an oxidizing Ar-H₂-H₂O/air dual atmosphere on the kinetics and mechanism of oxidation of the Crofer 22APU steel as compared to oxidation in a single atmosphere (Ar-H₂-H₂O or air), the oxidation kinetics of this steel were investigated both in single and dual reaction atmospheres at 1073 K during 100, 250, 500, and 1000 h of oxidation. Detailed morphological observations and the results of chemical composition analyses carried out using transmission electron microscopy combined with energy-dispersive X-ray spectroscopy revealed the presence of Fe in the scale formed on the cathode side in the dual atmosphere. Based on morphological observations (scanning- and transmission electron microscopies) and chemical and phase composition analyses (energy-dispersive X-ray spectroscopy and X-ray diffraction, respectively) of the products of oxidation of the Crofer 22APU steel, and on the determined oxidation kinetics, a mechanism describing scale growth on both sides of the steel during its oxidation in conditions involving a gradient of the chemical potential of oxygen and hydrogen was proposed.

Keywords

EN

81.05.Bx; 81.65.Mq; 81.70.-q; 87.64.Ee; 88.30.pn

Discipline

• 81.70.-q: Methods of materials testing and analysis(see also 82.80.-d Chemical analysis and related physical methods of analysis)
• 81.05.Bx: Metals, semimetals, and alloys
• 81.65.Mq: Oxidation(see also 64.75.Lm Phase separation and segregation in oxidation)
• 87.64.Ee: Electron microscopy
• 88.30.pn: Solid oxide fuel cells

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 5
• Pages: 1394-1398

Dates

published

2017-05

Contributors

author

M. Stygar

• Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Krakow, Poland

author

K. Matsuda

• Department of Materials Science and Engineering, University of Toyama, Toyama, Japan

author

S. Lee

• Department of Materials Science and Engineering, University of Toyama, Toyama, Japan

author

T. Brylewski

• Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Krakow, Poland

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Identifiers

DOI

10.12693/APhysPolA.131.1394