The corrosion behaviour of iron and chromium in molten (Li0.62K0.38)2CO3

Biedenkopf, P.; Spiegel, M.; Grabke, H. J.

doi:10.1016/s0013-4686(97)10191-8

Cited by 32 publications

(9 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[38][39][40][41] The influence of depth of immersion on the iron oxide precursor seems to be confirmed by the fact that a spinel iron oxide mostly composed of a partially-oxidized Li 5 Fe 5 O 8 phase has been observed only if the coating process is carried out under deep melt bath conditions. Formation of this phase during corrosion of metallic iron in deep carbonate melts has been already described by Biendenkopf et al, 42 at 650…”

Section: F856mentioning

confidence: 52%

Composite Cu-LaFeO₃Conversion Coatings on a 18Cr Ferritic Stainless Steel for IT-SOFC Interconnects: An Investigation on Structure and Formation Mechanism

Masi

Frangini

Seta

et al. 2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

In this work, a novel iron chemical conversion coating process has been applied to deposit a composite Cu-LaFeO 3 perovskite coating layer on a commercial 18Cr ferritic stainless steel for application as Intermediate-Temperature Solid Oxide Fuel Cell (IT-SOFC) interconnect. The conversion process is carried out at 600 • C under a CO 2 gas atmosphere in a binary eutectic lithium-sodium molten carbonate bath containing lanthanum, magnesium and copper additions in form of their respective oxides. Multi-layer coatings are obtained, with a surface composite layer formed by a dense perovskite polycrystalline thick film with metallic copper particles encased in the perovskite grains grown on a Fe-rich spinel sublayer. Copper oxide additions significantly promote the formation of the LaFeO 3 perovskite layer, and the experimental results suggest that galvanic coupling phenomena between the alloy elements and copper take place during the coating formation process. Chemical stability and Cr diffusion barrier properties of the composite coating have been evaluated in air exposure experiments at 700 • C for 200 h. The perovskite phase shows high stability after the high temperature exposure, with no detectable sign of Cr diffusion in the layer. Details on functional properties of these composite conversion coatings for IT-SOFC applications will be reported in a subsequent study.

show abstract

Section: F856mentioning

confidence: 52%

Composite Cu-LaFeO₃Conversion Coatings on a 18Cr Ferritic Stainless Steel for IT-SOFC Interconnects: An Investigation on Structure and Formation Mechanism

Masi

Frangini

Seta

et al. 2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…In contrast, this study examined the oxidation of Cr-Mo steels exposed to molten LiNaKNO 3 salt, which revealed scales with an outer layer of LiFeO 2 and an inner layer of (Fe, Cr) 3 O 4 . The formation of LiFeO 2 (instead of Fe 2 O 3 ) also occurs in a similar corrosion system in which chromium-containing steels are exposed to molten LiCO 3 -K 2 CO 3 eutectic salt [14][15][16][17]. A comparison of the two systems leads to the following conclusions.…”

Section: Discussionmentioning

confidence: 84%

High-temperature corrosion of Cr–Mo steel in molten LiNO3–NaNO3–KNO3 eutectic salt for thermal energy storage

Cheng¹,

Chen²,

Wang³

2015

Solar Energy Materials and Solar Cells

View full text Add to dashboard Cite

“…Biedenkopf et al [20]. They found that the oxide layer thickness increased with decrease in Cr content in the alloy.…”

Section: Resultsmentioning

confidence: 96%

“…The amount of nickel and chromium cations in the carbonate melt increases with time and saturates after about 100 hours. Biedenkopf et al [20] report increased concentration of Cr with time in the melt for high alloy steels. Further, they also observed that the oxide film thickness varied inversely with the chromium content in the steel.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of the Cathode Long-Term Stability in Molten Carbonate Fuel Cells: Experimental Study and Mathematical Modeling

White¹

2001

View full text Add to dashboard Cite

SS 304 was encapsulated with thin layers of Co-Ni by an electroless deposition process.The corrosion behavior of SS304 and Co-Ni-SS304 was investigated in molten carbonate under cathode gas atmosphere with electrochemical and surface characterization tools. Surface modification of SS304 reduced the dissolution of chromium and nickel into the molten carbonate melt. Composition of the corrosion scale formed in case of Co-Ni-SS304 is different from SS304 and shows the presence of Co and Ni oxides while the latter shows the presence of lithium ferrite. Polarization resistance for oxygen reduction reaction and conductivity of corrosion values for the corrosion scales were obtained using impedance analysis and current-potential plots. The results indicated lower polarization resistance for oxygen reduction reaction in the case of CoNi-SS304 when compared to SS304. Also, the conductivity of the corrosion scales was considerably higher in case of Co-Ni-SS304 than the SS304. This study shows that modifying the current collector surface with Co-Ni coatings leads to the formation of oxide scales with improved barrier properties and electronic conductivity.3

show abstract

The corrosion behaviour of iron and chromium in molten (Li0.62K0.38)2CO3

Cited by 32 publications

References 17 publications

Composite Cu-LaFeO₃Conversion Coatings on a 18Cr Ferritic Stainless Steel for IT-SOFC Interconnects: An Investigation on Structure and Formation Mechanism

Composite Cu-LaFeO₃Conversion Coatings on a 18Cr Ferritic Stainless Steel for IT-SOFC Interconnects: An Investigation on Structure and Formation Mechanism

High-temperature corrosion of Cr–Mo steel in molten LiNO3–NaNO3–KNO3 eutectic salt for thermal energy storage

Optimization of the Cathode Long-Term Stability in Molten Carbonate Fuel Cells: Experimental Study and Mathematical Modeling

Contact Info

Product

Resources

About

The corrosion behaviour of iron and chromium in molten (Li0.62K0.38)2CO3

Cited by 32 publications

References 17 publications

Composite Cu-LaFeO3Conversion Coatings on a 18Cr Ferritic Stainless Steel for IT-SOFC Interconnects: An Investigation on Structure and Formation Mechanism

Composite Cu-LaFeO3Conversion Coatings on a 18Cr Ferritic Stainless Steel for IT-SOFC Interconnects: An Investigation on Structure and Formation Mechanism

High-temperature corrosion of Cr–Mo steel in molten LiNO3–NaNO3–KNO3 eutectic salt for thermal energy storage

Optimization of the Cathode Long-Term Stability in Molten Carbonate Fuel Cells: Experimental Study and Mathematical Modeling

Contact Info

Product

Resources

About

Composite Cu-LaFeO₃Conversion Coatings on a 18Cr Ferritic Stainless Steel for IT-SOFC Interconnects: An Investigation on Structure and Formation Mechanism

Composite Cu-LaFeO₃Conversion Coatings on a 18Cr Ferritic Stainless Steel for IT-SOFC Interconnects: An Investigation on Structure and Formation Mechanism