|About this Abstract
||MS&T23: Materials Science & Technology
||Ceramics for New Generation Nuclear Energy System Application
||Thermodynamic Assessment of Chromium and Nickel Corrosion in Molten Fluoride Salts
||Mina Aziziha, Juliano Schorne-Pinto, Clara M. Dixon, Jacob A. Yingling, Jorge Paz Soldan Palma, Johnathan C. Ard, Theodore M. Besmann
|On-Site Speaker (Planned)
Corrosion in molten fluoride salt reactors is influenced by the redox state of the salt. In fluoride salts, chromium, and nickel are known to exhibit high vulnerability to depletion from alloy surfaces. As LiF is the major component of the proposed coolants for MSRs that employ molten fluoride salts, it is essential to describe LiF-based corrosion to chemically approximate chromium and nickel dissolution tendencies. Therefore, we experimentally investigated the behavior of the LiF-CrF3 system by crystallographic and thermal analysis as only limited phase equilibria were previously reported. Samples containing 0 to 30 mole % CrF3 were considered as corrosion product concentrations in the salt mixture are expected to be small. Additionally, we evaluated the LiF-NiF2 considering recently published data and higher-order systems for the NiF2 solubility in FLiBe, improving the pseudo-binary description. This and other descriptions are available in the open-source compendium Molten Salt Thermal Properties Database - Thermochemical (MSTDB-TC).