Cited by 155Molten salt chemistry and electrochemical processesHigh-Temperature Coating BehaviorsMetallurgical Processes and Thermodynamics

Chemistry and electrochemistry of hot corrosion of metals

Rapp, Robert A·1987·Materials Science and Engineering

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Crossref · 10.1016/0025-5416(87)90394-6

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26 of 26 references verified0 citation errors · 0 not checkable

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  • Na2SO4 is the predominant chemical reactant involved in hot corrosion induced by molten sulfate salts, due to its extraordinary stability over a wide range of temperatures and oxygen partial pressures.

    “The predominant chemical reactant involved in hot corrosion has been confirmed to be sodium sulfate (Na2SO4), due to its extraordinary stability over a wide range of temperatures and oxygen partial pressures [1, 6, 19].”

    From A review on molten sulfate salts induced hot corrosion (2021) · cites this paper as [19]

  • The molten salt layer is a pure ionic conductor that physically separates the alloys from the gas phase.

    “As with the thin aqueous layer on alloys in atmospheric corrosion, this molten salt layer is a pure ionic conductor which separates the alloys from the gas phase physically [1, 19, 47].”

    From A review on molten sulfate salts induced hot corrosion (2021) · cites this paper as [19]

  • Sulfate salts easily attach onto the surfaces of high temperature components and melt to form a thin fused salt film at elevated temperatures.

    “These sulfate salts easily attach onto the surfaces of high temperature components and are melted to form a thin fused salt film at elevated temperatures.”

    From A review on molten sulfate salts induced hot corrosion (2021) · cites this paper as [19]

  • S2O7^2- is more active than O2 and SO4^2- and is reduced to SO4^2- and SO3^-, and this half-reaction can be the main reduction reaction.

    “Moreover, S2O7 2is more active than other oxygen species, i.e., O2 and SO4 2- , and is reduced to SO4 2and SO3 - . This half-reaction can be the main reduction reaction [6, 19, 75].”

    From A review on molten sulfate salts induced hot corrosion (2021) · cites this paper as [19]

  • In an O2-SO2-SO3 environment, O2 and SO2 have poor solubility in molten salt, whereas SO3 can dissolve by forming pyrosulfate ions.

    “In the O2-SO2-SO3 environment (Eq. (1)), the solubilities of both O2 and SO2 in molten salt are poor. In contrast, SO3 can dissolve in molten salt because of the formation of pyrosulfate ions through Eq. (2) [1, 19].”

    From A review on molten sulfate salts induced hot corrosion (2021) · cites this paper as [19]

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Authors
Rapp, R. A.
Affiliations
The Ohio State University (US)
Corresponding author
Rapp, Robert A
Venue
Materials Science and Engineering
Publisher
Elsevier BV
Published
1987-03
Volume
87
Pages
319-327
ISSN
0025-5416 (ISSN-L)
OpenAlex
W2027813190
Cited by
155
References
26
Citations by year
2026: 9 · 2025: 8 · 2024: 6 · 2023: 8 · 2022: 6 · 2021: 12 · 2020: 5 · 2019: 9 · 2018: 6 · 2017: 3 · 2016: 4 · 2015: 2 · 2014: 7 · 2013: 7 · 2012: 1
FWCI
4.35
Type
journal article
Language
en
Open access
closed
Locations
Materials Science and Engineering (publishedVersion)
Topics
  • Physical Sciences › Chemical Engineering › Fluid Flow and Transfer Processes › Molten salt chemistry and electrochemical processes
  • Physical Sciences › Engineering › Aerospace Engineering › High-Temperature Coating Behaviors
  • Physical Sciences › Engineering › Mechanical Engineering › Metallurgical Processes and Thermodynamics
Keywords
hot corrosion, oxide solubility, Pourbaix diagrams, sodium sulfate, sodium metavanadate, acid solubility, electrochemical corrosion mechanism, metal oxides, iron oxide, chromium oxide, alumina

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