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Title:
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Anodic Protection Assessment Using Alumina-Forming Alloys in Chloride Molten Salt for CSP Plants
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Author:
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Fernández, Ángel G.; Cabeza, Luisa F.
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Notes:
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The generation of a natural protective coating in alumina-forming alloys was analyzed using a ternary chloride molten salt as a thermal energy storage material for concentrated solar power (CSP) technology. The formation of the protective layer was monitored using electrochemical impedance spectroscopy (EIS). A protective layer model for the OCT alloy and a localized corrosion model for the OCI and OC4 alloys were obtained after 5 h of immersion. The corrosion rates calculated using the linear polarization technique (LPR), were 8.03, 21.55, and 7.61 mm/year for OC4, OCI, and OCT alloys, respectively. These results were confirmed by scanning electron microscopy and X-ray diffraction. Our analysis showed that MgAl2O4 was the main protective coating generated by the alumina-forming alloys.
Angel G. Fernández would like to acknowledge the financial support from the European
Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant No 712949
(TECNIOspring PLUS) and from the Agency for Business Competitiveness of the Government of Catalonia. This
work was partially funded by the Ministerio de Ciencia, Innovación y Universidades de España (RTI2018-
093849-B-C31 - MCIU/AEI/FEDER, UE) and the Agencia Estatal de Investigación (AEI) of the Ministerio de
Ciencia, Innovación y Universidades (RED2018-102431-T). The authors would like to thank the Catalan
Government for the quality accreditation given to their research group GREiA (2017 SGR 1537). GREiA is a
certified agent TECNIO in the category of technology developers from the Government of Catalonia. This work
is partially supported by ICREA under the ICREA Academia programme. |
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Rights:
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cc-by (c) Ángel G. Fernández, Luisa F. Cabeza, 2020
http://creativecommons.org/licenses/by/4.0/
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Document type:
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Article
Article - Published version |
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Published by:
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MDPI
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