Journal
CORROSION SCIENCE
Volume 103, Issue -, Pages 165-172Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.11.014
Keywords
Ceramic; Molten salts; XANES; XPS; High temperature corrosion; Reactor conditions
Funding
- Strategic Priority Research Program of the Chinese Academy of Science [XDA 02004220]
- Program of International S & T Co-operation of China [2014DFG60230]
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The corrosion of SiC in molten FLiNaK (46.5 mol% LiF, 11.5 mol% NaF and 42 mol% KF) salt was studied. Results reveal that oxygen impurities from SiC and salt can affect the corrosion. SiC with a large amount of oxygen impurity is corroded, whereas high purity SiC is only slightly corroded. SiC can react with oxygen impurity in salt to form oxide and then corroded by the cleavage of Si-O-Si bond. Corrosion decreases the Si content in SiC, resulting in formation of a carbon-rich surface. A portion of excess C reacts with F to form C F bonds. (C) 2015 Elsevier Ltd. All rights reserved.
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