Measurements and predictions of diffusible hydrogen escape and absorption in catholically charged 316LN austenitic stainless steel
Abstract Hydrogen can have an impact on the service life of safety critical components, such as coolant pipes in nuclear reactors, where it may interact with other factors including irradiation. Hence, it is important to characterise such behaviour which in turn requires the capability to charge rep...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-06-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-37371-y |
| _version_ | 1797789861460049920 |
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| author | Melissa Weihrauch Maulik Patel Eann A. Patterson |
| author_facet | Melissa Weihrauch Maulik Patel Eann A. Patterson |
| author_sort | Melissa Weihrauch |
| collection | DOAJ |
| description | Abstract Hydrogen can have an impact on the service life of safety critical components, such as coolant pipes in nuclear reactors, where it may interact with other factors including irradiation. Hence, it is important to characterise such behaviour which in turn requires the capability to charge representative material specimens with hydrogen and to quantity the levels of hydrogen present. Hydrogen concentrations resulting from cathodic charging of 316LN stainless steel over short time periods (< 2 h) were estimated from hydrogen release rates obtained from potentiostatic discharge measurements and used to calibrate simulations based on Fick’s second law of diffusion in order to predict the hydrogen concentration after 24 h of charging. Leave-one-out cross-validation was used to establish confidence in results which were also validated using measurements from the melt extraction technique. The success of Fick’s second law for estimating escape rates showed that a majority of the absorbed hydrogen was diffusible rather than trapped. These results confirmed that the potentiostatic discharge technique can be used on materials with low diffusivity, and provide a new method through which hydrogen concentrations within a sample can be estimated after cathodic charging non-destructively without the need to remove samples from solution. |
| first_indexed | 2024-03-13T01:56:34Z |
| format | Article |
| id | doaj.art-9b4f8d6ff3394af5a759c999aadb81d3 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-13T01:56:34Z |
| publishDate | 2023-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-9b4f8d6ff3394af5a759c999aadb81d32023-07-02T11:12:50ZengNature PortfolioScientific Reports2045-23222023-06-0113111410.1038/s41598-023-37371-yMeasurements and predictions of diffusible hydrogen escape and absorption in catholically charged 316LN austenitic stainless steelMelissa Weihrauch0Maulik Patel1Eann A. Patterson2School of Engineering, University of Liverpool, The QuadrangleSchool of Engineering, University of Liverpool, The QuadrangleSchool of Engineering, University of Liverpool, The QuadrangleAbstract Hydrogen can have an impact on the service life of safety critical components, such as coolant pipes in nuclear reactors, where it may interact with other factors including irradiation. Hence, it is important to characterise such behaviour which in turn requires the capability to charge representative material specimens with hydrogen and to quantity the levels of hydrogen present. Hydrogen concentrations resulting from cathodic charging of 316LN stainless steel over short time periods (< 2 h) were estimated from hydrogen release rates obtained from potentiostatic discharge measurements and used to calibrate simulations based on Fick’s second law of diffusion in order to predict the hydrogen concentration after 24 h of charging. Leave-one-out cross-validation was used to establish confidence in results which were also validated using measurements from the melt extraction technique. The success of Fick’s second law for estimating escape rates showed that a majority of the absorbed hydrogen was diffusible rather than trapped. These results confirmed that the potentiostatic discharge technique can be used on materials with low diffusivity, and provide a new method through which hydrogen concentrations within a sample can be estimated after cathodic charging non-destructively without the need to remove samples from solution.https://doi.org/10.1038/s41598-023-37371-y |
| spellingShingle | Melissa Weihrauch Maulik Patel Eann A. Patterson Measurements and predictions of diffusible hydrogen escape and absorption in catholically charged 316LN austenitic stainless steel Scientific Reports |
| title | Measurements and predictions of diffusible hydrogen escape and absorption in catholically charged 316LN austenitic stainless steel |
| title_full | Measurements and predictions of diffusible hydrogen escape and absorption in catholically charged 316LN austenitic stainless steel |
| title_fullStr | Measurements and predictions of diffusible hydrogen escape and absorption in catholically charged 316LN austenitic stainless steel |
| title_full_unstemmed | Measurements and predictions of diffusible hydrogen escape and absorption in catholically charged 316LN austenitic stainless steel |
| title_short | Measurements and predictions of diffusible hydrogen escape and absorption in catholically charged 316LN austenitic stainless steel |
| title_sort | measurements and predictions of diffusible hydrogen escape and absorption in catholically charged 316ln austenitic stainless steel |
| url | https://doi.org/10.1038/s41598-023-37371-y |
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