Elektrochemische Korrosionsuntersuchungen in einer eutektischen Alkalisulfatschmelze
Abstract
Es wird eine Versuchsanordnung für elektroschemische Korrosionsuntersuchungen in Salzschmelzen beschrieben. Als „Modellschmelze”︁ wurde das ternäre Eutektikum aus Li 2 SO 4, Na 2 SO 4 und K 2 SO 4 gewählt. Als Referenzelektrode wurde eine auf dem Gleichgewicht Silber/Silberionen basierende Elektrode entwickelt. Eine Trennung der Elektrodenräume erwies sich als wichtig, da die Oxydations‐ und Reduktionsprodkute der Schmelze weitgehend in der Schmelze verbleiben und zusätzliche Elektrodenprozesse verursachen. Dies Trennung der Elektrodenräume erfolgt durch Glas, des bei hoher Temperature ein reiner Ionenleiter ist. Als Beispiel für die Anwendbarkeit der Methode werden einige Stromdichte‐Potential‐Kurven und Strom‐Zeit‐Kurven gezeigt. Die Korrosionsgeschwindigkeit kann durch Messen des Polarisationswiderstandes verfolgt werden.
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In an oxidizing environment without SO2 or SO3, cathodic reactions including reduction of oxygen and sulfate ions may be involved.
“In the oxidizing environment without SO2 or SO3, several cathodic reactions including the reduction of oxygen and sulfate ions might be involved as shown in Eq. (18-21) [19, 84].”
From A review on molten sulfate salts induced hot corrosion (2021) · cites this paper as [84]
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A review on molten sulfate salts induced hot corrosion
Hu, S., Finklea, H., & Liu, X. (2021) · Journal of Materials Science & Technology · doi:10.1016/j.jmst.2021.03.013 · Cited by 183 · see citing works
- Authors
- Rahmel, A.
- Affiliations
- Society for Chemical Engineering and Biotechnology (DE)
- Corresponding author
- Rahmel, A.
- Venue
- Materials and Corrosion
- Publisher
- Wiley
- Published
- 1968-09
- Volume
- 19
- Issue
- 9
- Pages
- 750-756
- ISSN
- 0043-2822 (ISSN-L)
- 0947-5117
- 1521-4176
- OpenAlex
- W2001405318
- Cited by
- 36
- References
- 0
- Citations by year
- 2025: 1 · 2021: 1
- FWCI
- 2.01
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Materials and Corrosion (publishedVersion)
- Topics
- Physical Sciences › Chemical Engineering › Fluid Flow and Transfer Processes › Molten salt chemistry and electrochemical processes
- Physical Sciences › Materials Science › Materials Chemistry › Corrosion Behavior and Inhibition
- Physical Sciences › Engineering › Mechanical Engineering › Metallurgical Processes and Thermodynamics
- Keywords
- electrochemical corrosion, molten salt corrosion, polarization resistance, corrosion rate, current-time curves, current density-potential curves
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