Evolution of corrosion products on ASTM A36 and AISI 304L steels formed in exposure to molten NaNO<sub>3</sub>-KNO<sub>3</sub> eutectic salt: Electrochemical study
link https://doi.org/10.1016/j.corsci.2021.110047account_box Pineda, Fabiolaaccount_box Walczak, Magdalenaaccount_box Vilchez, Francoaccount_box Guerra, Carolinaaccount_box Escobar, Rodrigoaccount_box Sancy, Mamie
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Thermal energy storage uses molten salt as a heat transfer fluid implies a high corrosion risk. In this work, ASTM A36 and AISI 304L steel, exposed to solar salt at 390 degrees C for 21 days, were studied by electrochemical impedance spectroscopy. The results were validated by mass gain and the characterization of corrosion products. Carbon steel revealed a porous behavior related to the formation of corrosion products based on iron oxides, as described the De Levies theory, whereas stainless steel showed the formation of a passive multilayer of iron and chromium oxides, which was adjusted to the Power-law model.
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| Autor | Pineda, Fabiola Walczak, Magdalena Vilchez, Franco Guerra, Carolina Escobar, Rodrigo Sancy, Mamie |
| Título | Evolution of corrosion products on ASTM A36 and AISI 304L steels formed in exposure to molten NaNO<sub>3</sub>-KNO<sub>3</sub> eutectic salt: Electrochemical study |
| Revista | Corrosion science |
| ISSN | 0010-938X |
| ISSN electrónico | 1879-0496 |
| Volumen | 196 |
| Fecha de publicación | 2022 |
| Resumen | Thermal energy storage uses molten salt as a heat transfer fluid implies a high corrosion risk. In this work, ASTM A36 and AISI 304L steel, exposed to solar salt at 390 degrees C for 21 days, were studied by electrochemical impedance spectroscopy. The results were validated by mass gain and the characterization of corrosion products. Carbon steel revealed a porous behavior related to the formation of corrosion products based on iron oxides, as described the De Levies theory, whereas stainless steel showed the formation of a passive multilayer of iron and chromium oxides, which was adjusted to the Power-law model. |
| Derechos | acceso restringido |
| DOI | 10.1016/j.corsci.2021.110047 |
| Enlace | |
| Id de publicación en WoS | WOS:000782055800003 |
| Palabra clave | Concentrated solar power Thermal energy storage Electrochemical impedance spectroscopy Solar salt High-temperature corrosion Steel |
| Tema ODS | 07 Affordable and Clean Energy |
| Tema ODS español | 07 Energía asequible y no contaminante |
| Tipo de documento | artículo |