Corrosion of Structural Alloys in High-Temperature Molten Fluoride Salts for Applications in Molten Salt Reactors
Abstract Hastelloy N®, a nickel-based alloy, and 316 stainless steel are among the candidate structural materials being considered for the construction of the molten salt reactor (MSR). Most of the proposed MSR concepts use molten fluoride salts as coolant which can be quite corrosive...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Springer US
2021
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| Online Access: | https://hdl.handle.net/1721.1/131918 |
| _version_ | 1811089890402631680 |
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| author | Zheng, Guiqiu Sridharan, Kumar |
| author_facet | Zheng, Guiqiu Sridharan, Kumar |
| author_sort | Zheng, Guiqiu |
| collection | MIT |
| description | Abstract
Hastelloy N®, a nickel-based alloy, and 316 stainless steel are among the candidate structural materials being considered for the construction of the molten salt reactor (MSR). Most of the proposed MSR concepts use molten fluoride salts as coolant which can be quite corrosive to structural alloys. The results of studies on the corrosion behavior of the two alloys in molten Li2BeF4 (FLiBe) salt at 700°C are discussed.
This salt is being considered as the primary coolant for MSR designs featuring solid fuel particles, but the reported results also provide insights into the corrosion in MSR designs where the uranium fuel is dissolved in the molten fluoride salt. Corrosion was observed to occur predominantly by de-alloying of Cr from the alloy surface and into the molten salt, with more pronounced attack occurring along the grain boundaries than in the bulk grains.
The magnitude and the mechanisms of corrosion were different for corrosion tests performed in graphite and metallic capsules, a result warranting recognition given the coexistence of structural alloys and graphite in the molten salt medium in the MSR. |
| first_indexed | 2024-09-23T14:26:40Z |
| format | Article |
| id | mit-1721.1/131918 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T14:26:40Z |
| publishDate | 2021 |
| publisher | Springer US |
| record_format | dspace |
| spelling | mit-1721.1/1319182021-09-21T03:19:50Z Corrosion of Structural Alloys in High-Temperature Molten Fluoride Salts for Applications in Molten Salt Reactors Zheng, Guiqiu Sridharan, Kumar Abstract Hastelloy N®, a nickel-based alloy, and 316 stainless steel are among the candidate structural materials being considered for the construction of the molten salt reactor (MSR). Most of the proposed MSR concepts use molten fluoride salts as coolant which can be quite corrosive to structural alloys. The results of studies on the corrosion behavior of the two alloys in molten Li2BeF4 (FLiBe) salt at 700°C are discussed. This salt is being considered as the primary coolant for MSR designs featuring solid fuel particles, but the reported results also provide insights into the corrosion in MSR designs where the uranium fuel is dissolved in the molten fluoride salt. Corrosion was observed to occur predominantly by de-alloying of Cr from the alloy surface and into the molten salt, with more pronounced attack occurring along the grain boundaries than in the bulk grains. The magnitude and the mechanisms of corrosion were different for corrosion tests performed in graphite and metallic capsules, a result warranting recognition given the coexistence of structural alloys and graphite in the molten salt medium in the MSR. 2021-09-20T17:30:56Z 2021-09-20T17:30:56Z 2018-06-26 2020-09-24T21:43:41Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/131918 en https://doi.org/10.1007/s11837-018-2981-2 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The Minerals, Metals & Materials Society application/pdf Springer US Springer US |
| spellingShingle | Zheng, Guiqiu Sridharan, Kumar Corrosion of Structural Alloys in High-Temperature Molten Fluoride Salts for Applications in Molten Salt Reactors |
| title | Corrosion of Structural Alloys in High-Temperature Molten Fluoride Salts for Applications in Molten Salt Reactors |
| title_full | Corrosion of Structural Alloys in High-Temperature Molten Fluoride Salts for Applications in Molten Salt Reactors |
| title_fullStr | Corrosion of Structural Alloys in High-Temperature Molten Fluoride Salts for Applications in Molten Salt Reactors |
| title_full_unstemmed | Corrosion of Structural Alloys in High-Temperature Molten Fluoride Salts for Applications in Molten Salt Reactors |
| title_short | Corrosion of Structural Alloys in High-Temperature Molten Fluoride Salts for Applications in Molten Salt Reactors |
| title_sort | corrosion of structural alloys in high temperature molten fluoride salts for applications in molten salt reactors |
| url | https://hdl.handle.net/1721.1/131918 |
| work_keys_str_mv | AT zhengguiqiu corrosionofstructuralalloysinhightemperaturemoltenfluoridesaltsforapplicationsinmoltensaltreactors AT sridharankumar corrosionofstructuralalloysinhightemperaturemoltenfluoridesaltsforapplicationsinmoltensaltreactors |