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

  1. Lambrecht, Mickaël
  2. García-Martín, Gustavo
  3. de Miguel, María Teresa
  4. Lasanta, María Isabel
  5. Pérez, Francisco Javier
Revista:
Corrosion Science

ISSN: 0010-938X

Año de publicación: 2022

Volumen: 208

Páginas: 110673

Tipo: Artículo

DOI: 10.1016/J.CORSCI.2022.110673 GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: Corrosion Science

Resumen

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.

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