Corrosion Behavior of Metals in Flowing Ar-42.6%O<sub>2</sub>-14.7%Br<sub>2</sub>Gas Mixture at 700°C

Lee, S.; Maemura, K.; Yamamura, Tsutomu; Nakazawa, Shigeatsu; Lee, K.H.; Chang, Dong Yim; Ahn, JH; Chung, Hyun Kee

doi:10.5006/1.3278247

Cited by 11 publications

(5 citation statements)

References 2 publications

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“…3 and Fig. 6 are explained in terms of metal chloride formation at the oxide/metal interface, where the partial pressure of oxygen could be quite low [14,15].…”

Section: Examination and Characterization Of The Post-exposure C-2000...mentioning

confidence: 96%

Archives of Metallurgy and Materials

Lee

Kim

Choi

et al. 2020

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A mechanistic exposure experiment was performed on the commercially available and welded Ni-Cr-Mo-Fe alloy samples used in the piping materials of the coal gasification pilot plant. Thermodynamic Ellingham-Pourbaix stability diagrams were constructed to provide insight into the mechanism of the observed corrosion behavior. The thermodynamic inference on the corrosion mechanism was supplemented with the morphological, compositional and microstructural analyses of the exposed samples using scanning electron microscopy, X-ray diffraction and energy-dispersive X-ray spectroscopy analyses. X-ray diffraction result revealed stable corrosion products of NiO, MoNi 4 and Cr 4.6 MoNi 2.1 after accumulated total exposure duration of 139 h to the corrosive atmosphere. Scanning electron microscopy and energy-dispersive X-ray spectroscopy positively identified formation of rather continuous and adherent pre-oxidation corrosion products although extensively peeled-off oxides were finally observed as corrosion scales on the post-exposure alloy samples, which were attributed to the chlorination/oxidation into thin (spalled) oxides.

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“…3 and Fig. 6 are explained in terms of metal chloride formation at the oxide/metal interface, where the partial pressure of oxygen could be quite low [14,15].…”

Section: Examination and Characterization Of The Post-exposure C-2000...mentioning

confidence: 96%

Archives of Metallurgy and Materials

Lee

Kim

Choi

et al. 2020

View full text Add to dashboard Cite

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“…Them ost stable materials for these environments seem to be niobium or tantalumm etals or materials coatedw ith these metals. [46,94] In addition, the flowfield geometry may also result in dead spots, wherein isolated corrosion or starvation can occur, [57b] or where localized high-potential corrosion could happen due to shunt-current distributions in the manifold of astack.…”

Section: Flow Fieldmentioning

confidence: 99%

A Review of Hydrogen/Halogen Flow Cells

2016

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Flow batteries provide an energy-storage solution for various grid-related stability and service issues arising as renewableenergy-generation technologies are adopted. Among the most promising flow-battery systems are those using hydrogen/halogen redox couples, which promise the possibility to meet the DOE's cost target, due to their fast and reversible kinetics and low materials cost. However, significant critical issues and barriers for their adoption remain. In this review of the halogen/hydrogen systems, the technical and performance issues, and research and development progress are reviewed. The information in this review can be used as a technical guide for research and development of related redox-flow-battery systems and other electrochemical technologies.

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“…High-temperature electrolytic water-splitting is supported by nuclear process or geothermal heat sources and electricity has the potential to produce hydrogen with overall system efficiencies near those of the thermo-chemical processes [3][4][5] the corrosive conditions of thermo-chemical processes [6][7][8] and without the fossil fuel consumption and greenhouse gas emissions associated with hydrocarbon processes [3]. Besides, the environmental impacts of the high-temperature electrolysis process are comparable to those of the solar thermal process [9].…”

Section: Introductionmentioning

confidence: 95%