Corrosion of steel alloys in molten NaCl + Na2SO4 at 700 degrees C for thermal energy storage

Madjid Sarvghad; Geoffrey Will; Theodore A. Steinberg

doi:10.1016/j.solmat.2017.11.017

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Corrosion of steel alloys in molten NaCl + Na2SO4 at 700 degrees C for thermal energy storage

Journal article

Peer reviewed

Corrosion of steel alloys in molten NaCl + Na2SO4 at 700 degrees C for thermal energy storage

Madjid Sarvghad, Geoffrey Will and Theodore A. Steinberg

Solar Energy Materials and Solar Cells, Vol.179, pp.207-216

2018

DOI: https://doi.org/10.1016/j.solmat.2017.11.017

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Abstract

molten salt

impedance spectroscopy

polarization

corrosion

oxidation

Stainless steel 316, duplex steel 2205 and carbon steel 1008 were examined for compatibility with the eutectic mixture of NaCl + Na2SO4 at 700 degrees C in air for thermal energy storage. Electrochemical measurements combined with advanced microscopy techniques were employed. Results confirmed oxidation to be the primary attack to all metals. Ferritic alloy 1008 was found the most vulnerable alloy with severe oxidative attack. Alloys 316 and 2205 showed close performance while grain boundary oxidative and sulfur attack threatened these materials. Alloy 2205 showed chromium depletion followed by selective oxidation of ferrite in the presence of a semi protective film on the surface.

Details

Title: Corrosion of steel alloys in molten NaCl + Na2SO4 at 700 degrees C for thermal energy storage
Authors: Madjid Sarvghad (Corresponding Author) - Queensland University of Technology
Geoffrey Will (Author) - Queensland University of Technology
Theodore A. Steinberg (Author) - Queensland University of Technology
Publication details: Solar Energy Materials and Solar Cells, Vol.179, pp.207-216
Publisher: Elsevier BV, North-Holland
DOI: 10.1016/j.solmat.2017.11.017
ISSN: 1879-3398
Grant note: Australian Solar Thermal Research Initiative (ASTRI) Australian Government via the Australian Renewable Energy Agency (ARENA) AINSE Ltd (PGRA) Science and Engineering Faculty, QUT
Organisation Unit: School of Science, Technology and Engineering
Language: English
Record Identifier: 99737873902621
Output Type: Journal article

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