The effect of temperature on chromium vaporization and oxide scale growth on interconnect steels for Solid Oxide Fuel Cells

Influence of Nickel on High‐Temperature Oxidation and Characteristics of Oxide Layers in Two High‐Strength Steels

“…In contrast, for HNi samples, where more magnetite is present in the oxide layer, the surface of sample looks brighter and with smoother surface, as shown in Figure . It is also interesting to note that, in addition to the representative peaks of wustite, magnetite, and hematite, the presence of spinel and chromite phases was detected in both steels that are in accordance with former studies . The effects of spinel and chromite phases will be discussed in details afterward.…”

“…Using the XRD analysis results shown in Figure and , the presence of spinel and Cr 2 O 3 phases peaks could be inferred. As the spinel composition is FeOCr 2 O 3 , it could be expected that this layer is placed between wustite and Cr 2 O 3 phases . It should be also noted that Cr 2 O 3 layer shows a decreasing gradient toward the base metal.…”

“…It is also interesting to note that, in addition to the representative peaks of wustite, magnetite, and hematite, the presence of spinel and chromite phases was detected in both steels that are in accordance with former studies. [42] The effects of spinel and chromite phases will be discussed in details afterward. Regarding the oxidized samples at 1200 C in Figure 8, some swollen lumps could be seen.…”

“…As the spinel composition is FeOCr 2 O 3 , it could be expected that this layer is placed between wustite and Cr 2 O 3 phases. [42,44,45] It should be also noted that Cr 2 O 3 layer shows a decreasing gradient toward the base metal. However, as shown in Figure 11, the thickness of the Cr 2 O 3 layer is thinner in the HNi steel (about 12 μm in LNi and about 4 μm in HNi).…”

LaFeO3 perovskite conversion coatings grown on a 13Cr ferritic stainless steel: a corrosion degradation study in simulated solid oxide fuel cell (SOFC) interconnect conditions at 700 °C

“…Hematite formation in dual atmosphere oxidation experiments should not be surprising since several studies have already described that similar phenomena take place in stainless steels as a consequence of a localized disruption (breakaway) of the initially formed protective oxide layer [9,25,26,28,31]. However, to the best of our knowledge, studies regarding dual atmosphere oxidation resistance of 13Cr steels have never been published.…”