Oxidation behavior of coated and preoxidized ferritic steel in single and dual atmosphere exposures at 800°C

Amendola, Roberta; Gannon, Paul; Ellingwood, Brian; Hoyt, Kathryn; Piccardo, Paolo; Genocchio, Pietro

doi:10.1016/j.surfcoat.2011.09.054

Cited by 39 publications

(15 citation statements)

References 21 publications

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“…In that case, strong corrosion phenomena were detected after an exposure to dual atmosphere at 800 °C for 1100 h. The absence of corrosion reported here seems to confirm that the earlier observations of corrosion [30] had indeed occurred as a consequence of exposure to the dual atmosphere and not from interaction between the sealant and the steel. This would be in agreement with other studies, in which the breakaway corrosion development is bonded to the effect of dual atmosphere exposition [37][38][39].…”

Section: Resultssupporting

confidence: 93%

Interface stability between bare, Mn Co spinel coated AISI 441 stainless steel and a diopside-based glass-ceramic sealant

Sabato

Chrysanthou

Salvo

et al. 2018

International Journal of Hydrogen Energy

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Section: Resultssupporting

confidence: 93%

Interface stability between bare, Mn Co spinel coated AISI 441 stainless steel and a diopside-based glass-ceramic sealant

Sabato

Chrysanthou

Salvo

et al. 2018

International Journal of Hydrogen Energy

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“…This layer was comparable among the samples extracted from twin stacks operated for differing numbers of hours [21]. Other studies performed on the same kind of steel protected with a coating confirm the formation of a TGO with a thickness that increases with time [34][35][36][37]. In this specific case, it was possible to detect the impact of parameters, such as the polarization and the temperature, on the Mn diffusion.…”

Section: The Air Sidesupporting

confidence: 65%

Investigation of a Metallic Interconnect Extracted from an SOFC Stack after 40,000 h of Operation

2022

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An in-depth investigation was performed on a metallic interconnect extracted from an SOFC stack operated for 40,000 h. The characterization was performed on the surface and the cross-section, paying attention to the evolution of the materials due to the interaction with the dual atmosphere of the stack under operating parameters. The interaction between materials (i.e., metal substrate, coatings and atmospheres) and stack components (i.e., current collectors and MIC) generated several modifications that affected the surface and, in some cases, the bulk of the interconnect. The careful metallographic preparation allowed for the performance of an intensive microscopical characterization of the cross-sections all along the interconnect profile, from the inlet to the outlet of the fuel stream. The formation of thermal grown oxides on both sides and their evolution were studied and described. The interconnect, after 40,000 h, was still suitable for operation, but the few bulk changes due to the diffusion of Ni and the TGO that formed at the fuel side suggest the introduction of fuel side coatings to increase the life expectations of the whole stack.

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“…On the other hand, within the void at the edge of the sample, there was either trapped air or direct access of air to the stainless steel. According to Amendola [36] and Bram [37] pre-oxidation of stainless steel for at least 100 hrs at 800°C is necessary to suppress breakaway corrosion in a dual-phase atmosphere. The steel in the current study had been pre-oxidised for a far shorter time and prolonged exposure to air led to oxidation of both iron and chromium.…”

Section: Joined Samples Gas Tightness Test In Dual Atmosphere and Pomentioning

confidence: 99%

Glass-ceramic sealant for solid oxide fuel cells application: Characterization and performance in dual atmosphere

Sabato

Cempura

Montinaro

et al. 2016

Journal of Power Sources

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A glass-ceramic composition was designed and tested for use as a sealant in solid oxide fuel cell (SOFC) planar stack design. The crystallization behaviour was investigated by calculating the Avrami parameter (n) and the activation energy for crystallization (E-c) was obtained. The calculated values for n and Ec were 3 and 413.5 kj/mol respectively. The results of thermal analyses indicate that this composition shows no overlap between the sintering and crystallization stages and thus an almost pore-free sealant can be deposited and sintered at 850 degrees C in air for 30 min. A gas tightness test has been carried out at 800 degrees C for 1100 h in dual atmosphere (Ar-H-2 and air) without recording any leakage. Morphological and crystalline phase analyses were conducted prior and following tests in dual atmospheres in order to assess the compatibility of the proposed sealant with the metallic interconnect

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Oxidation behavior of coated and preoxidized ferritic steel in single and dual atmosphere exposures at 800°C

Cited by 39 publications

References 21 publications

Interface stability between bare, Mn Co spinel coated AISI 441 stainless steel and a diopside-based glass-ceramic sealant

Interface stability between bare, Mn Co spinel coated AISI 441 stainless steel and a diopside-based glass-ceramic sealant

Investigation of a Metallic Interconnect Extracted from an SOFC Stack after 40,000 h of Operation

Glass-ceramic sealant for solid oxide fuel cells application: Characterization and performance in dual atmosphere

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