Application of voltammetry for quantitative analysis of chromium in molten 2LiF-BeF2 (FLiBe) salt

Doniger, William H.; Sridharan, Kumar

doi:10.1016/j.jelechem.2019.02.048

Title: Application of voltammetry for quantitative analysis of chromium in molten 2LiF-BeF₂ (FLiBe) salt

Journal Article · Tue Feb 26 00:00:00 EST 2019 · Journal of Electroanalytical Chemistry

DOI:https://doi.org/10.1016/j.jelechem.2019.02.048· OSTI ID:1613874

Doniger, William H. ^[1]; Sridharan, Kumar ^[1]

University of Wisconsin, Madison, WI (United States)

The electrochemical behavior of Cr²⁺ in molten 2LiF-BeF₂ (FLiBe) salt at temperatures between 500 °C and 700 °C was studied using cyclic voltammetry (CV) and linear sweep voltammetry (LSV). LSV has been used to establish a stable reference electrode with the Be/Be²⁺ couple. The ability to distinguish between common corrosion products, such as Cr2+ and Fe²⁺, with CV has been demonstrated using the Be/Be²⁺ reference reaction. Methods for high-precision, in-situ quantitative measurement of Cr²⁺ concentration are developed. Models for predicting the concentration of Cr²⁺ and its diffusion coefficient are approximated by relating faradaic cathodic peak current density to Cr²⁺ concentration at 600 °C and 650 °C. Here this study provides the basis for the development of a sensor for on-line quantification of corrosion products that improves understanding of materials performance in the molten FLiBe salt.

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Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE), Nuclear Energy University Program (NEUP); USDOE

Grant/Contract Number:: NE0008285

OSTI ID:: 1613874

Alternate ID(s):: OSTI ID: 1547702

Journal Information:: Journal of Electroanalytical Chemistry, Vol. 838, Issue C; ISSN 1572-6657

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 14 works

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Corrosion and Thermal Stability of CrMnFeNi High Entropy Alloy in Molten FLiBe Salt Elbakhshwan, Mohamed; Doniger, William; Falconer, Cody Scientific Reports, Vol. 9, Issue 1 https://doi.org/10.1038/s41598-019-55653-2	journal	December 2019

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Title: Application of voltammetry for quantitative analysis of chromium in molten 2LiF-BeF₂ (FLiBe) salt