A Materials Screening Test of Corrosion Monitoring in LiNO<sub>3</sub> Containing Molten Salts as a Thermal Energy Storage Material for CSP Plants
Concentrated solar power (CSP) plants, in the context of thermal energy storage (TES) upgrades, need to provide a timely and effective response to the corrosion process that occurs due to the effect of high temperatures, where one of the main challenges is to control its effect, and thus the costs r...
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MDPI AG
2020-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/9/3160 |
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| author | Abdiel Mallco Carlos Portillo Marcelo J Kogan Felipe Galleguillos Angel G. Fernández |
| author_facet | Abdiel Mallco Carlos Portillo Marcelo J Kogan Felipe Galleguillos Angel G. Fernández |
| author_sort | Abdiel Mallco |
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| description | Concentrated solar power (CSP) plants, in the context of thermal energy storage (TES) upgrades, need to provide a timely and effective response to the corrosion process that occurs due to the effect of high temperatures, where one of the main challenges is to control its effect, and thus the costs related to the materials used. Electrochemical impedance spectroscopy (EIS) and linear polarization resistance (LPR) were applied in this study as a corrosion monitoring technique. The electrochemical tests were carried out on the materials AISI304, AISI430, and HR-224 immersed in a mixture of ternary salt composed of 57 wt.% KNO<sub>3</sub> + 13 wt.% NaNO<sub>3</sub> + 30 wt.% LiNO<sub>3</sub> at 550 °C during 100 h of exposure and subsequently compared with solar salt. The test was also carried out on the VM12 alloy in the ternary salt with lithium content at 100 and 1000 h of exposure at 550 °C. The corrosion tests show that the materials conform to a model of protective layer in which the same results were contrasted with the chemical corrosion mechanism of nitrate mixture. According to the results obtained in this research, electrochemical techniques could be an interesting option to control corrosion in CSP plants and reduce operational risks during operation. |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T20:06:39Z |
| publishDate | 2020-05-01 |
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| spelling | doaj.art-8fc64cbab8dc4d208b885ae783bcb1682023-11-19T23:14:17ZengMDPI AGApplied Sciences2076-34172020-05-01109316010.3390/app10093160A Materials Screening Test of Corrosion Monitoring in LiNO<sub>3</sub> Containing Molten Salts as a Thermal Energy Storage Material for CSP PlantsAbdiel Mallco0Carlos Portillo1Marcelo J Kogan2Felipe Galleguillos3Angel G. Fernández4Centro de Desarrollo Energético de Antofagasta, Universidad de Antofagasta, Av. Universidad de Antofagasta 02800, Antofagasta 1271155, ChileCentro de Desarrollo Energético de Antofagasta, Universidad de Antofagasta, Av. Universidad de Antofagasta 02800, Antofagasta 1271155, ChileDepartamento de Química Farmacológica y Toxicológica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago 8330111, ChileDepartamento de Ingeniería Química y Procesos de Minerales, Universidad de Antofagasta, Antofagasta 1271155, ChileCentro de Desarrollo Energético de Antofagasta, Universidad de Antofagasta, Av. Universidad de Antofagasta 02800, Antofagasta 1271155, ChileConcentrated solar power (CSP) plants, in the context of thermal energy storage (TES) upgrades, need to provide a timely and effective response to the corrosion process that occurs due to the effect of high temperatures, where one of the main challenges is to control its effect, and thus the costs related to the materials used. Electrochemical impedance spectroscopy (EIS) and linear polarization resistance (LPR) were applied in this study as a corrosion monitoring technique. The electrochemical tests were carried out on the materials AISI304, AISI430, and HR-224 immersed in a mixture of ternary salt composed of 57 wt.% KNO<sub>3</sub> + 13 wt.% NaNO<sub>3</sub> + 30 wt.% LiNO<sub>3</sub> at 550 °C during 100 h of exposure and subsequently compared with solar salt. The test was also carried out on the VM12 alloy in the ternary salt with lithium content at 100 and 1000 h of exposure at 550 °C. The corrosion tests show that the materials conform to a model of protective layer in which the same results were contrasted with the chemical corrosion mechanism of nitrate mixture. According to the results obtained in this research, electrochemical techniques could be an interesting option to control corrosion in CSP plants and reduce operational risks during operation.https://www.mdpi.com/2076-3417/10/9/3160thermal energy storageelectrochemical impedance spectroscopylithium nitrateconcentrated solar powercorrosion mechanisms |
| spellingShingle | Abdiel Mallco Carlos Portillo Marcelo J Kogan Felipe Galleguillos Angel G. Fernández A Materials Screening Test of Corrosion Monitoring in LiNO<sub>3</sub> Containing Molten Salts as a Thermal Energy Storage Material for CSP Plants Applied Sciences thermal energy storage electrochemical impedance spectroscopy lithium nitrate concentrated solar power corrosion mechanisms |
| title | A Materials Screening Test of Corrosion Monitoring in LiNO<sub>3</sub> Containing Molten Salts as a Thermal Energy Storage Material for CSP Plants |
| title_full | A Materials Screening Test of Corrosion Monitoring in LiNO<sub>3</sub> Containing Molten Salts as a Thermal Energy Storage Material for CSP Plants |
| title_fullStr | A Materials Screening Test of Corrosion Monitoring in LiNO<sub>3</sub> Containing Molten Salts as a Thermal Energy Storage Material for CSP Plants |
| title_full_unstemmed | A Materials Screening Test of Corrosion Monitoring in LiNO<sub>3</sub> Containing Molten Salts as a Thermal Energy Storage Material for CSP Plants |
| title_short | A Materials Screening Test of Corrosion Monitoring in LiNO<sub>3</sub> Containing Molten Salts as a Thermal Energy Storage Material for CSP Plants |
| title_sort | materials screening test of corrosion monitoring in lino sub 3 sub containing molten salts as a thermal energy storage material for csp plants |
| topic | thermal energy storage electrochemical impedance spectroscopy lithium nitrate concentrated solar power corrosion mechanisms |
| url | https://www.mdpi.com/2076-3417/10/9/3160 |
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