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Corrosion study of Ni-based alloy in ternary chloride salt for thermal storage application



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Lambrecht, Mickael and García Martin, Gustavo and de Miguel Gamo, María Teresa and Lasanta Carrasco, María Isabel and Pérez Trujillo, Francisco Javier (2022) Corrosion study of Ni-based alloy in ternary chloride salt for thermal storage application. Corrosion Science, 208 . p. 110673. ISSN 0010-938X

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Official URL: https://doi.org/10.1016/j.corsci.2022.110673


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.

Item Type:Article
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CRUE-CSIC (Acuerdos Transformativos 2022)

Uncontrolled Keywords:Molten chlorides corrosion Thermodynamic simulations Concentrated solar power Thermal storage
Subjects:Sciences > Chemistry > Chemical engineering
Sciences > Chemistry > Materials
ID Code:74910
Deposited On:04 Oct 2022 07:09
Last Modified:18 Oct 2022 09:02

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