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Electrochemical characterization of high alloyed materials in molten salts for solar energy applications

  • Within the last years the use of feasible alternative energy sources has risen and is going to replace fossil resources more and more. Nevertheless, service conditions in solar facilities are due to the chemical composition of heat transmission media and temperatures, in many cases, extreme in terms of corrosion. Since the construction of power plants shall be economical with maximum life service, materials selection based on preliminary material qualification is essential to guarantee a secure and reliable operation of those facilities. The materials selection depends on the operation temperature of a power plant on the chemical composition of the transmission fluid used. In high corrosive environments Ni-based alloys are often used as an all-round solution for the construction of corrosion resistant parts, because of their good corrosion properties. However, there might be limits for their use regarding their corrosion behavior, with which this contribution deals. ExperiencesWithin the last years the use of feasible alternative energy sources has risen and is going to replace fossil resources more and more. Nevertheless, service conditions in solar facilities are due to the chemical composition of heat transmission media and temperatures, in many cases, extreme in terms of corrosion. Since the construction of power plants shall be economical with maximum life service, materials selection based on preliminary material qualification is essential to guarantee a secure and reliable operation of those facilities. The materials selection depends on the operation temperature of a power plant on the chemical composition of the transmission fluid used. In high corrosive environments Ni-based alloys are often used as an all-round solution for the construction of corrosion resistant parts, because of their good corrosion properties. However, there might be limits for their use regarding their corrosion behavior, with which this contribution deals. Experiences from the electrochemical characterization of materials in aqueous solutions are transferred to molten salts, providing a good addition to common exposure tests at temperatures from 450 0C to 600 0C. By means of electrochemical measurements and exposure tests the suitability of high alloyed materials in molten nitrate salt (60 % NaNO3/40 % KNO3) can be characterized. The method was verified on different Ni-based alloys (UNS N08810, UNS N06600) and Titanium (UNS R50250).zeige mehrzeige weniger

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Metadaten
Autor*innen:Ralph BäßlerORCiD, Oleksandra Yevtushenko, H. Hattendorf
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Graue Literatur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):NACE International corrosion conference 2015 (Proceedings)
Jahr der Erstveröffentlichung:2015
Herausgeber (Institution):NACE International
Erste Seite:paper 5659, S. 1
Letzte Seite:9
Freie Schlagwörter:Electrochemical characterization; Localized corrosion; Nickel based alloys; Renewables; Solar energy; UNS N06600; UNS N08810; UNS R50250
Veranstaltung:NACE International Corrosion Conference 2015
Veranstaltungsort:Dallas, TX, USA
Beginndatum der Veranstaltung:15.03.2015
Enddatum der Veranstaltung:19.03.2015
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:10.11.2015
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