Dynamic pilot plant facility for applications in CSP: Evaluation of corrosion resistance of A516 in a nitrate molten salt mixture

This paper evaluates the corrosion of A516 carbon steel in the binary Solar Salt (60 wt.% NaNO3/40 wt.% KNO3) by immersion tests with continuous salt flow at 500 °C. To this end, a novel patented experimental facility enabling dynamic degradation tests of materials in contact with molten mediums was...

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Bibliographic Details
Main Authors: Pérez, Francisco Javier, Encinas-Sánchez, Víctor, García-Martín, Gustavo, Lasanta, María Isabel, de Miguel, María Teresa
Format: Conference Proceeding
Language:English
Subjects:
Carbon steels
Corrosion
Corrosion rate
Corrosion resistance
Corrosion resistant steels
Corrosion tests
Dynamic tests
Immersion tests (corrosion)
Molten salts
Pilot plants
Substrates
Thermal cycling
Ultrasonic testing
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Summary:This paper evaluates the corrosion of A516 carbon steel in the binary Solar Salt (60 wt.% NaNO3/40 wt.% KNO3) by immersion tests with continuous salt flow at 500 °C. To this end, a novel patented experimental facility enabling dynamic degradation tests of materials in contact with molten mediums was developed and used. Experimental results showed greater corrosion rates and thicker oxide layers in samples subjected to tests with continuous salt flow than the static ones. The dynamic test facility simulates real conditions (flux, thermocycling, etc.) of a CSP plant. The patented experimental pilot plant is a great step forward in learning about the physicochemical properties and behavior of molten salts and also behavior of substrates in contact with them under realistic working conditions.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4984503