Corrosion Behavior of VM12-SHC Steel in Contact with Solar Salt and Ternary Molten Salt in Accelerated Fluid Conditions

Gustavo García-Martin, María I. Lasanta, María T. de Miguel, Andre Illana Sánchez and Francisco J. Pérez-Trujillo
Additional contact information
Gustavo García-Martin: Surface Engineering and Nanostructured Materials Research Group, Faculty of Chemical Sciences, Complutense University of Madrid, Complutense Avenue s/n, 28040 Madrid, Spain
María I. Lasanta: Surface Engineering and Nanostructured Materials Research Group, Faculty of Chemical Sciences, Complutense University of Madrid, Complutense Avenue s/n, 28040 Madrid, Spain
María T. de Miguel: Surface Engineering and Nanostructured Materials Research Group, Faculty of Chemical Sciences, Complutense University of Madrid, Complutense Avenue s/n, 28040 Madrid, Spain
Andre Illana Sánchez: Surface Engineering and Nanostructured Materials Research Group, Faculty of Chemical Sciences, Complutense University of Madrid, Complutense Avenue s/n, 28040 Madrid, Spain
Francisco J. Pérez-Trujillo: Surface Engineering and Nanostructured Materials Research Group, Faculty of Chemical Sciences, Complutense University of Madrid, Complutense Avenue s/n, 28040 Madrid, Spain

Energies, 2021, vol. 14, issue 18, 1-16

Abstract: Ternary low melting point mixtures with the addition of LiNO 3 and Ca(NO 3 ) 2 have been presented as direct system candidates for CSP technologies due to having better physical and chemical properties than those of Solar Salt. In this study, thermal, physical and chemical properties are measured as is the corrosive behavior of stainless alloy VM12 (Cr 12%) when in contact with Solar Salt, 60% NaNO 3 -40% KNO 3 (wt.%) and ternary 46% NaNO 3 -19% Ca(NO 3 ) 2 -35% LiNO 3 (wt.%). Gravimetric weight change measurements were performed on the test specimens, which were tested under accelerated fluid conditions (0.2 m s ?1 ) at 500 °C for 2000 h. This research confirms the potential of this novel formulation as a thermal storage medium and validates the suitability of ferritic VM12-SHC stainless steel as a structural material for CSP technology with Solar Salt. Meanwhile, the results obtained by scanning electron microscopy and X-ray diffraction indicate a reduction in the protective character of the oxide layer formed on this alloy when the medium contains calcium and lithium components.

Keywords: molten salts corrosion; VM12 steel; parabolic trough technology; CSP; pilot plant (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/14/18/5903/pdf (application/pdf)
https://www.mdpi.com/1996-1073/14/18/5903/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:14:y:2021:i:18:p:5903-:d:637668

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().