Corrosion study of Ni-based alloy in ternary chloride salt for thermal storage application
- Lambrecht, Mickaël
- García-Martín, Gustavo
- de Miguel, María Teresa
- Lasanta, María Isabel
- Pérez, Francisco Javier
ISSN: 0010-938X
Year of publication: 2022
Volume: 208
Pages: 110673
Type: Article
More publications in: Corrosion Science
Abstract
MgCl2/NaCl/KCl salt appeared as a high-potential heat transfer fluid for concentrated solar application, offering a wide operating range and low cost. Nevertheless, MgCl2 hydrates and atmosphere relative humidity are the limiting factors for a real scale CSP plant, leading to severe corrosion. Thus, Inconel 617 was tested at 700ºC up to 24 h in air atmosphere to simulate a punctual failure in the inertization system of a plant. XRD and SEM-EDX analysis showed unstable multilayers growing in cascade, highlighting chromium, aluminum, magnesium, and oxygen activities. Additionally, A radial growth of MgCr2O4 at the expense of MgO grains was visualized.
Funding information
Funders
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Agencia Estatal de Investigación
- PID2020-115866RB-C22/AEI/10.13039/501100011033
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