Corrosion mechanism of SS316L exposed to NaCl/Na2CO3 molten salt in air and argon environments

S. Bell; M.W.M. Jones; E. Graham; D J Paterson; G.A. van Riessen; G. Hinsley; T. Steinberg; G. Will

doi:10.1016/j.corsci.2021.109966

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Corrosion mechanism of SS316L exposed to NaCl/Na2CO3 molten salt in air and argon environments

Journal article

Peer reviewed

Corrosion mechanism of SS316L exposed to NaCl/Na2CO3 molten salt in air and argon environments

S. Bell, M.W.M. Jones, E. Graham, D J Paterson, G.A. van Riessen, G. Hinsley, T. Steinberg and G. Will

Corrosion Science, Vol.195, pp.1-6

2022

DOI: https://doi.org/10.1016/j.corsci.2021.109966

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Abstract

Corrosion

Molten salt corrosion

Oxidation state

Synchrotron

Molten salts are potential energy storage media for solar thermal power, but can be highly corrosive. To investigate molten salt corrosion mechanisms, the oxidation state and structure of SS316L exposed to salt in air and argon environments was investigated using SEM and XANES techniques. It was determined that iron formed mixed Fe2+ and Fe3+ states in both environments, with lower oxidation states deeper into the corrosion. Cr2+ was the primary oxidation state present in the scale for chromium. Reduced salt basicity with lower oxygen concentration favoured the lower oxidation state, whilst Cr3+ ions were dissolved by the salt.

Details

Title: Corrosion mechanism of SS316L exposed to NaCl/Na2CO3 molten salt in air and argon environments
Authors: S. Bell (Corresponding Author) - Queensland University of Technology
M.W.M. Jones (Author) - Queensland University of Technology
E. Graham (Author) - Queensland University of Technology
D J Paterson (Author) - Australian Synchrotron
G.A. van Riessen (Author) - La Trobe University
G. Hinsley (Author) - La Trobe University
T. Steinberg (Author) - Queensland University of Technology
G. Will (Author) - Queensland University of Technology
Publication details: Corrosion Science, Vol.195, pp.1-6
Publisher: Elsevier Ltd
DOI: 10.1016/j.corsci.2021.109966
ISSN: 1879-0496
Organisation Unit: School of Science, Technology and Engineering
Language: English
Record Identifier: 99737876502621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering

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