CIFICEN   24414
CENTRO DE INVESTIGACIONES EN FISICA E INGENIERIA DEL CENTRO DE LA PROVINCIA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
316L stainless steel corrosion in molten salts NaNO 3 KNO 3 NaNO 2 simulating storage conditions
Autor/es:
AMAYA-CÁCERES, C C; SANDOVAL-AMADOR, A; ESTUPIÑÁN-DURAN, H A; SANTANDER-VEGA, A J; PEÑA-BALLESTEROS, D Y
Revista:
Journal of Physics: Conference Series
Editorial:
IOP Publishing
Referencias:
Año: 2019 vol. 1159
ISSN:
1742-6588
Resumen:
A wide variety of stainless steel is used in concentrated solar plants in differentelements as pipelines, pumps, storage tanks, among others, and these are in contact withmolten salts, which are used as thermal energy transfer fluids. In this paper, corrosion ofstainless steel AISI 316L in molten salt NaNO3 - NaNO2 - KNO3 has been investigated attemperatures of 450, 500 and 550°C, for an exposure period of 150 hours. The salt mixture issprayed by spray onto the surface of 316L stainless steel, which has been preheated to 170°C.To obtain a thin layer of salt on the samples, these are carried to the furnace in the presence ofan oxidizing atmosphere at high temperature for 1, 3, 10, 30, 100 and 150 hours. The results ofmass gain and characterization by SEM-EDS and XRD of the surfaces showing the formationof a passive film, composed mainly of hematite Fe2O3. The thickening of the oxide film isaccording to a parabolic law, whose speed depends on the temperature of the melt.