Corrosion in Supercritical Water Oxidation Systems: A Phenomenological Analysis
Open accessAbstract
Pronounced corrosion damage occurs in supercritical water oxidation reactors, and few materials are immune to attack. In this paper, we describe a phenomenological model for the corrosion process, and we discuss the effect of electrolyte dissociation and water density, as influenced by temperature and pressure, upon the kinetics of corrosion of metals and alloys in supercritical water. The corrosion process at near‐critical temperatures is believed to involve acid attack, with the concentration of H + being a function of the dissociation constant of , which is a major product of the oxidation of chlorinated organic waste, and of the density of the solution. We show that the competing effects of temperature on the heterogeneous rate constant and on the concentrations of H + and leads to a pressure (and hence density)‐dependent maximum in the corrosion rate in the vicinity of the critical temperature. This result is in general agreement with experimental data on corrosion in aqueous solutions at near‐critical temperatures.
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Sulfate can lead to corrosion in supercritical water by metal oxidation, forming sulfide or S(0).
“Sulfate can lead to corrosion in supercritical water by metal oxidation (leading to sulfide/S 0 formation) 71 .”
From Continuous Extraction of Black Liquor Salts under Hydrothermal Conditions (2021) · cites this paper as [71]
The Introduction describes corrosion in supercritical water oxidation systems, and “Corrosion Mechanism and the Density of Solvent” describes electrochemical corrosion involving metal dissolution. Neither passage supports the specific claim that sulfate causes this corrosion by being reduced to sulfide or elemental sulfur; searches for sulfate, sulfide, and S(0) found no such mechanism in our copy. Page numbers were not available for these passages. (LLM, conf=0.78)
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Cited by 126
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- Authors
- Kriksunov, L. B., & Macdonald, D. D.
- Affiliations
- Pennsylvania State University (US)
- ORCID
- Macdonald, Digby D.
- Venue
- Journal of The Electrochemical Society
- Publisher
- The Electrochemical Society
- Published
- 1995-12-01
- Volume
- 142
- Issue
- 12
- Pages
- 4069-4073
- ISSN
- 0013-4651 (ISSN-L)
- 1945-7111
- OpenAlex
- W2003774491
- Cited by
- 126
- References
- 0
- Citations by year
- 2025: 1 · 2024: 2 · 2023: 1 · 2022: 6 · 2021: 4 · 2020: 1 · 2019: 8 · 2018: 1 · 2017: 3 · 2016: 4 · 2015: 3 · 2014: 4 · 2013: 5 · 2012: 6
- FWCI
- 3.47
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Journal of The Electrochemical Society (publishedVersion)
- Funders
- University of Pennsylvania
- Pennsylvania State University
- Idaho State University
- Army Research Office
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Subcritical and Supercritical Water Processes
- Physical Sciences › Materials Science › Materials Chemistry › Corrosion Behavior and Inhibition
- Physical Sciences › Engineering › Computational Mechanics › Heat transfer and supercritical fluids
- Keywords
- supercritical water oxidation, corrosion, corrosion kinetics, electrolytic dissociation, water density, acid attack, hydrogen ions, heterogeneous rate constant, critical temperature, pressure dependence, phenomenological model
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