Anodic and Cathodic Protection Assessment on Chloride Molten Salts for the Next Generation of CSP Plants

Thumbnail
View/Open
Issue date
2019
Author
Fernández, Ángel G.
Cabeza, Luisa F.
Suggested citation
Fernández, Ángel G.; Cabeza, Luisa F.; . (2019) . Anodic and Cathodic Protection Assessment on Chloride Molten Salts for the Next Generation of CSP Plants. Proceedings of the 25th SolarPACES Conference, Daegu, South Korea, October 1-4, 2019. SolarPACES Conference. http://hdl.handle.net/10459.1/69559.
Impact

Google Scholar logo  Google Scholar
Share
Export to Mendeley
Metadata
Show full item record
Abstract
The prevention of high-temperature corrosion on containment materials plays a critical role, and a corrosion mitigation plan is needed to achieve the target plant lifetime of 30 years. This paper analyzed two mitigation corrosion strategies (anodic and cathodic protection) in a eutectic ternary chloride molten salt, composed by 20.4wt.% KCl + 55.1wt.% MgCl2 + 24.5wt.% NaCl. The corrosion mechanism and corrosion rates were obtained through electrochemical impedance spectroscopy (EIS). Ni base alloys generate a protective scale layer (anodic protection) during 8 hours of immersion with a corrosion rate of 6.34 mm/year (In702) and 3.12 mm/year (HR224). Monitoring corrosion results were confirmed by scanning electron microscopy (SEM) and X-ray diffraction (XRD), obtaining alumina and chromia protective layers.
URI
http://hdl.handle.net/10459.1/69559
Is part of
Proceedings of the 25th SolarPACES Conference, Daegu, South Korea, October 1-4, 2019
Collections