Corrosion of stainless steel 316 in eutectic molten salts for thermal energy storage

Madjid Sarvghad; Theodore A. Steinberg; Geoffrey Will

doi:10.1016/j.solener.2018.03.053

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Corrosion of stainless steel 316 in eutectic molten salts for thermal energy storage

Journal article

Open access

Peer reviewed

Corrosion of stainless steel 316 in eutectic molten salts for thermal energy storage

Madjid Sarvghad, Theodore A. Steinberg and Geoffrey Will

Solar Energy, Vol.172, pp.198-203

2018

DOI: https://doi.org/10.1016/j.solener.2018.03.053

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Abstract

steel alloy

molten salt

corrosion

microscopy

Stainless steel 316 was examined for compatibility with the eutectic mixtures of NaCl + Na2CO3 and NaCl + Na2SO4 at 700 degrees C and Li2CO3 + K2CO3 + Na2CO3 at 450 degrees C in air for thermal energy storage. Electrochemical measurements combined with advanced microscopy and microanalysis techniques were employed. NaCl + Na2CO3 was found as the most aggressive salt at 700 degrees C. The attack morphology on the surface was uniform corrosion with no localized degradation at 450 degrees C. Microscopy observations showed grain boundary oxidative attack as the primary corrosion mechanism at 700 degrees C with depletion of alloying elements from grain boundaries.

Details

Title: Corrosion of stainless steel 316 in eutectic molten salts for thermal energy storage
Authors: Madjid Sarvghad (Corresponding Author) - Queensland University of Technology
Theodore A. Steinberg (Author) - Queensland University of Technology
Geoffrey Will (Author) - Queensland University of Technology
Publication details: Solar Energy, Vol.172, pp.198-203
Publisher: Elsevier Ltd
Date published: 2018
DOI: 10.1016/j.solener.2018.03.053
ISSN: 1471-1257; 0038-092X
Grant note: Science and Engineering Faculty, QUT Australian Solar Thermal Research Initiative (ASTRI) - Australian Government via the Australian Renewable Energy Agency (ARENA)
Organisation Unit: School of Science, Technology and Engineering
Language: English
Record Identifier: 99737996502621
Output Type: Journal article

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