Rok 2024

• Pre-oxidation of porous ferritic Fe22Cr alloys for lifespan extension at high-temperature

  Publikacja

  • D. Koszelow
  • M. Makowska
  • F. Marone
  • G. Cempura
  • M. Tomas
  • J. Froitzheim
  • S. Molin

  - CORROSION SCIENCE - Rok 2024

  Pre-oxidation of porous ferritic Fe22Cr alloys was extensively studied in this paper. Weight gain measurements and SEM analysis revealed that pre-oxidation performed at 900◦C for 40 min increased the lifespan of the alloy. A Cr evaporation study did not disclose any significant influence of the pre-oxidation process on the Cr content in the alloy. For a more detailed assessment, TEM imaging and X-ray tomography measurements of...

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Rok 2023

• High-temperature Corrosion of ~ 30 Pct Porous FeCr Stainless Steels in Air: Long-Term Evaluation Up to Breakaway

  Publikacja

  • D. Koszelow
  • M. Makowska
  • A. Drewniak
  • G. Cempura
  • P. Jasiński
  • S. Molin

  - METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE - Rok 2023

  In this work, a long-term (up to 6000 hours) corrosion evaluation of three porous (~ 30 pct of initial porosity) ferritic iron-chromium alloys with different Cr contents (20, 22, and 27 wt pct of Cr) was carried out at 600 C, 700 C, 800 C, and 900 C in air. Mass gain measurements and SEM analyses revealed that at temperatures above 600 C, all alloys exhibit breakaway corrosion, whereas at 600 C, none of the alloys were heavily...

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Rok 2022

• Glass-ceramic joining of Fe22Cr porous alloy to Crofer22APU: interfacial issues and mechanical properties

  Publikacja

  • F. D'Isanto
  • M. Salvo
  • S. Molin
  • D. Koszelow
  • H. Javed
  • S. Akram
  • A. Chrysanthou
  • F. Smeacetto

  - CERAMICS INTERNATIONAL - Rok 2022

  This work deals with the joining of porous Fe22Cr ferritic stainless steel to a dense Crofer22APU plate by using a silica-based, Ba-containing glass-ceramic. The chemical and interfacial stability and the mechanical properties of the joints were evaluated before and after thermal ageing at 700 ◦C for 500hrs. The sintering behaviour of the glass was assessed by using heating stage microscopy (HSM) to study the influence of a porous...

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• Morphology changes in Fe-Cr porous alloys upon high-temperature oxidation quantified by X-ray tomographic microscopy

  Publikacja

  • D. Koszelow
  • S. Molin
  • J. Karczewski
  • F. Marone
  • M. Makowska

  - MATERIALS & DESIGN - Rok 2022

  The effect of high-temperature oxidation at 850 C (10 h, 30 h, 100 h) and 900 C (10 h) on porous (30 % porosity) ferritic stainless steel (Fe22Cr) has been investigated using synchrotron tomographic microscopy, which allowed for visualisation, separation and quantitative analysis of the metallic core, closed pores, open pores and oxide scale phase. The same regions within the samples were investigated before and after oxidation...

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Rok 2021

• Glass-ceramic sealants and steel interconnects: accelerated interfacial stability and reactivity tests at high temperature

  Publikacja

  • A. Drewniak
  • D. Koszelow
  • P. Błaszczak
  • K. Górnicka
  • K. Jurak
  • H. Javed
  • A. G. Sabato
  • P. Jasiński
  • S. Molin
  • F. Smeacetto

  - MATERIALS & DESIGN - Rok 2021

  High-temperature reactions between glass-ceramic sealants and Fe-Cr alloy interconnects may lead to the formation of undesirable phases, and consequently degradation of solid oxide fuel/electrolyser devices. In this work, three different glass-ceramic sealants (Na-containing, Ba-containing, Sr-containing compositions) and Fe22Cr stainless steel powders (raw and pre-oxidised) are considered in order to test their chemical reactivity...

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• High temperature corrosion evaluation and lifetime prediction of porous Fe22Cr stainless steel in air in temperature range 700–900 °C

  Publikacja

  • D. Koszelow
  • M. Makowska
  • J. Karczewski
  • P. Jasiński
  • F. Marone
  • S. Molin

  - CORROSION SCIENCE - Rok 2021

  This work describes a high temperature corrosion kinetics study of ~30% porous Fe22Cr alloys. The surface area of the alloy (~0.02 m2 g-1) has been determined by tomographic microscopy. The weight gain of the alloys was studied by isothermal thermogravimetry in the air for 100 hours at 700 - 900 °C. Breakaway oxidation was observed after oxidation at 850 °C (~100 hours) and 900 °C (~30 hours). The lifetime prediction shows the...

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