TY - JOUR
T1 - Nanoparticles as a high-temperature anticorrosion additive to molten nitrate salts for concentrated solar power
AU - Nithiyanantham, U.
AU - Grosu, Y.
AU - Anagnostopoulos, A.
AU - Carbó-Argibay, E.
AU - Bondarchuk, O.
AU - González-Fernández, L.
AU - Zaki, A.
AU - Igartua, J.M.
AU - Navarro, M.E.
AU - Ding, Y.
AU - Faik, A.
PY - 2019
Y1 - 2019
N2 - Hot corrosion is profoundly detrimental to construction elements in Concentrated Solar Power (CSP) plants affecting their lifetime, running costs and safety. In this work we have studied the anticorrosion effect of TiO2 nanoparticles additives on carbon steel using XRD, XPS with depth profiling, EDX and FIB/SEM techniques. The results revealed that the addition of 1 wt% of TiO2 nanoparticles to molten binary nitrate salt reduces the corrosion rate of carbon steel more than twice and stabilizes the corrosion scale at 390 °C. The anticorrosion effect of TiO2 nanoadditive was attributed to the formation of iron-titanium mixed oxide on the carbon steel surface. It was confirmed by XRD and TGA techniques that addition of TiO2 nanoparticles does not alter the stability of the salt. In view of presented results, the feasibility of molten salts based nanofluids in the CSPs can be reconsidered in terms of improved compatibility with construction materials.
AB - Hot corrosion is profoundly detrimental to construction elements in Concentrated Solar Power (CSP) plants affecting their lifetime, running costs and safety. In this work we have studied the anticorrosion effect of TiO2 nanoparticles additives on carbon steel using XRD, XPS with depth profiling, EDX and FIB/SEM techniques. The results revealed that the addition of 1 wt% of TiO2 nanoparticles to molten binary nitrate salt reduces the corrosion rate of carbon steel more than twice and stabilizes the corrosion scale at 390 °C. The anticorrosion effect of TiO2 nanoadditive was attributed to the formation of iron-titanium mixed oxide on the carbon steel surface. It was confirmed by XRD and TGA techniques that addition of TiO2 nanoparticles does not alter the stability of the salt. In view of presented results, the feasibility of molten salts based nanofluids in the CSPs can be reconsidered in terms of improved compatibility with construction materials.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85072089694&partnerID=MN8TOARS
U2 - 10.1016/j.solmat.2019.110171
DO - 10.1016/j.solmat.2019.110171
M3 - Article
SN - 0927-0248
VL - 203
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
M1 - 110171
ER -