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Corrosion Behaviors and Mitigation Strategies of Metallic Alloys in Molten Chloride Salts for Thermal Energy Storage in CSP plants

Ding, Wenjin and Bonk, Alexander and Bauer, Thomas (2018) Corrosion Behaviors and Mitigation Strategies of Metallic Alloys in Molten Chloride Salts for Thermal Energy Storage in CSP plants. SolarPaces conference, Casablanca, Marokko.

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Abstract

Recently, more and more attention is paid on applications of molten chloride salts in concentrated solar power (CSP) plants as thermal energy storage (TES) and heat transfer fluid (HTF) materials due to their high thermal stability limits (>800°C) and low prices, compared to the commercial TES/HTF materials in CSP - nitrate salt mixtures (decomposed at ~550°C). Over the course of the SunShot Initiative, the U.S. Department of Energy (DOE) has supported the molten chloride salt development for the next generation CSP plants. A higher TES/HTF operating temperature leads to higher efficiency of thermal to electrical energy conversion of the power block in CSP, however causes additional challenges, particularly increased corrosiveness of metallic alloys used as containers and structural materials. This presentationOur studies presents corrosion behaviors and mechanisms of metallic alloys in molten chlorides at operating temperatures (500-800°C), as well as corresponding corrosion mitigation strategies to realize the commercial applications of molten chlorides in CSP, based on our works in these fields.

Item URL in elib:https://elib.dlr.de/125459/
Document Type:Conference or Workshop Item (Speech)
Title:Corrosion Behaviors and Mitigation Strategies of Metallic Alloys in Molten Chloride Salts for Thermal Energy Storage in CSP plants
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ding, WenjinWenjin.Ding (at) dlr.dehttps://orcid.org/0000-0001-5037-5810
Bonk, AlexanderAlexander.Bonk (at) dlr.dehttps://orcid.org/0000-0002-0676-7267
Bauer, Thomasthomas.bauer (at) dlr.dehttps://orcid.org/0000-0003-4080-7944
Date:20 December 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:Molten Chloride, Corrosion mitigation, electrochemical methods, Thermal Stability
Event Title:SolarPaces conference
Event Location:Casablanca, Marokko
Event Type:international Conference
HGF - Research field:Energy
HGF - Program:Storage and Cross-linked Infrastructures
HGF - Program Themes:Thermal Energy Storage
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Thermochemical Processes (Storage)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Bonk, Alexander
Deposited On:20 Dec 2018 14:14
Last Modified:20 Dec 2018 14:14

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