Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

A Treatise on Corrosion Science, Engineering and TechnologyMolten Salt Corrosion Behaviour of Graphite Materials

A Treatise on Corrosion Science, Engineering and Technology: Molten Salt Corrosion Behaviour of... [Graphite materials are considered as important structural materials in molten salt-based nuclear reactors, pyrochemical reprocessing and concentrated solar power plants. Various grades of graphite materials are proposed to be used as container materials such as crucibles, vessels, liners, coatings, reactor core, tank and pipes for molten chloride, fluoride and solar (nitrate) salts. The corrosion behaviour of different graphite materials was investigated in molten chloride, fluoride and nitrate salts at different temperatures and time periods. Structural and microstructural changes in the graphite materials after exposure to molten salts were examined from the weight change (loss/gain), electron microscopy, X-ray diffraction, Raman spectroscopic techniques. Microstructural characterization of corrosion tested samples revealed poor corrosion resistance to the molten salts and observed severe corrosion attack on the surface as well as salt penetration along the cross section of graphite. The degradation mechanism of graphite materials in molten salts was discussed. To minimize the corrosion of graphite materials in molten salts, coatings such as glassy carbon and pyrolytic carbon/graphite were developed on different grades of graphite. The corrosion behaviour of coated graphite materials was accessed in molten chloride and fluoride salts by immersion and salt impregnated tests. Glassy carbon and pyrolytic graphite showed remarkable inertness because of its dense microstructure, whereas pyrolytic graphite exhibited excellent corrosion resistance to molten salts.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

A Treatise on Corrosion Science, Engineering and TechnologyMolten Salt Corrosion Behaviour of Graphite Materials

Part of the Indian Institute of Metals Series Book Series
Editors: Kamachi Mudali, U.; Subba Rao, Toleti; Ningshen, S.; G. Pillai, Radhakrishna; P. George, Rani; Sridhar, T. M.
Sure, Jagadeesh; Kamachi Mudali, U.
Springer Journals — May 5, 2022
Download PDF
25 pages

Loading next page...
 
/lp/springer-journals/a-treatise-on-corrosion-science-engineering-and-technology-molten-salt-0g9i1yLdKD
Publisher
Springer Nature Singapore
Copyright
© The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2022
ISBN
978-981-16-9301-4
Pages
143 –168
DOI
10.1007/978-981-16-9302-1_9
Publisher site
See Chapter on Publisher Site

Abstract

[Graphite materials are considered as important structural materials in molten salt-based nuclear reactors, pyrochemical reprocessing and concentrated solar power plants. Various grades of graphite materials are proposed to be used as container materials such as crucibles, vessels, liners, coatings, reactor core, tank and pipes for molten chloride, fluoride and solar (nitrate) salts. The corrosion behaviour of different graphite materials was investigated in molten chloride, fluoride and nitrate salts at different temperatures and time periods. Structural and microstructural changes in the graphite materials after exposure to molten salts were examined from the weight change (loss/gain), electron microscopy, X-ray diffraction, Raman spectroscopic techniques. Microstructural characterization of corrosion tested samples revealed poor corrosion resistance to the molten salts and observed severe corrosion attack on the surface as well as salt penetration along the cross section of graphite. The degradation mechanism of graphite materials in molten salts was discussed. To minimize the corrosion of graphite materials in molten salts, coatings such as glassy carbon and pyrolytic carbon/graphite were developed on different grades of graphite. The corrosion behaviour of coated graphite materials was accessed in molten chloride and fluoride salts by immersion and salt impregnated tests. Glassy carbon and pyrolytic graphite showed remarkable inertness because of its dense microstructure, whereas pyrolytic graphite exhibited excellent corrosion resistance to molten salts.]

Published: May 5, 2022

Keywords: Carbon; Graphite; Glassy carbon; Pyrolytic graphite; Molten salts; Corrosion; Molten fluoride; Solar salt; Nitrate salt; Molten chloride; Microstructure; Raman spectroscopy; Electron microscopy; XRD; SEM/EDX

There are no references for this article.