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Title
Japanese: 
English:Corrosion resistance of Al-rich steel and Al2O3 ceramic bulk in liquid Sn 
Author
Japanese: 近藤 正聡, 多田 大, 大塚 洋子, 菱沼 良光, 室賀 健夫.  
English: Masatoshi Kondo, Masaru Tada, Youko Ohtsuka, Yoshimitsu Hishinuma, Takeo Muroga.  
Language English 
Journal/Book name
Japanese: 
English:Fusion Engineering and Design 
Volume, Number, Page        
Published date Apr. 9, 2019 
Publisher
Japanese: 
English:ELSEVIER 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://www.sciencedirect.com/science/article/pii/S0920379619305502
 
DOI https://doi.org/10.1016/j.fusengdes.2019.04.016
Abstract Liquid tin (Sn) is a promising coolant for liquid divertor concepts. However, its material compatibility with structural materials is an important issue. The purpose of the present study is to investigate corrosion resistance of Al-rich steel NTK04 L (Fe-17.7Cr-3.3Al-0.4Si) and Al2O3 ceramic bulk in liquid Sn. The oxidation treatment of the steel surface was performed in air at 773 K for 645 h in order to form an Al-rich oxide layer on its surface. The specimens of the Al-rich steel with and without the Al-rich oxide layer were immersed in liquid Sn at 773 K for 262 h. The corrosion test with Al2O3 ceramic bulk was also performed at the same conditions. After the corrosion tests, the specimen surfaces were metallurgically analyzed by FE-SEM/EDX, EPMA and AES. The steel which had the Al-rich oxide layer revealed corrosion resistance, though a very limited area of the surface was corroded according to the formation of Fe-Cr-Sn intermetallic compound. The Al2O3 ceramic bulk revealed corrosion resistance in liquid Sn, though small chemical reaction involving Ni impurity was detected on its surface.

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