An improved technique for molten salt corrosion sample preparation

Kaleb Lippiatt; Stuart Bell; Teng-Cheong Ong; Chris East; Donald McAuley; Geoffrey Will; Ted Steinberg

doi:10.1016/j.solmat.2021.111057

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An improved technique for molten salt corrosion sample preparation

Journal article

Peer reviewed

An improved technique for molten salt corrosion sample preparation

Kaleb Lippiatt, Stuart Bell, Teng-Cheong Ong, Chris East, Donald McAuley, Geoffrey Will and Ted Steinberg

Solar Energy Materials and Solar Cells, Vol.226, pp.1-7

2021

DOI: https://doi.org/10.1016/j.solmat.2021.111057

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Abstract

Concentrating solar thermal

Corrosion mechanisms

Electron microscopy

High-temperature corrosion

Molten salt

Phase-change material

Thermal energy storage

Proper materialographic sample preparation is vital in electron microscopy to produce the best quality material results, nearest to its true structure. Environments and media such as molten salts render traditional methods inadequate for analysis. An evaluation of conventional preparation techniques with different lubricants on 316 L stainless steel from its interaction with 59.4/40.6 wt% Na2CO3/NaCl eutectic salt show how corrosion layer information is lost or retained. Additional large-scale composite electron imaging and compound analysis work on the corrosion effects of 68.05/31.95 wt% Na2SO4/NaCl was also investigated on C-276 nickel superalloy. The new adaptation of sample preparation using kerosene as a lubricant is the best available option for compound analysis of molten salt corrosion, allowing corrosion mechanisms to be more well understood. The method also provided a sample surface that allows phase mapping and compound identification to a higher degree of accuracy than previously seen in the literature.

Details

Title: An improved technique for molten salt corrosion sample preparation
Authors: Kaleb Lippiatt (Corresponding Author) - Queensland University of Technology
Stuart Bell (Author) - Queensland University of Technology
Teng-Cheong Ong (Author) - Queensland University of Technology
Chris East (Author) - Queensland University of Technology
Donald McAuley (Author) - Queensland University of Technology
Geoffrey Will (Author) - Queensland University of Technology
Ted Steinberg (Author) - Queensland University of Technology
Publication details: Solar Energy Materials and Solar Cells, Vol.226, pp.1-7
Publisher: Elsevier BV, North-Holland
DOI: 10.1016/j.solmat.2021.111057
ISSN: 1879-3398
Organisation Unit: School of Science, Technology and Engineering
Language: English
Record Identifier: 99737998002621
Output Type: Journal article

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