Corrosion behavior of Fe, Cr, Ni and their alloys in sodium molybdate melts

Nagai, Takayuki ; Kikuchi, Kotaro*; Kano, Yoshiharu*

To understand the corrosion behavior of stainless steel and Ni-Cr alloys in sodium molybdate melts, the immersed corrosion tests of Fe, Cr, Ni, SUS316, 55Ni-45Cr, and Inconel 690 specimens were carried out in Na $_{2}$ MoO $_{4}$ and Na $_{2}$ Mo $_{2}$ O $_{7}$ melts at 750 $^{circ}$ C. The results of the immersed test, it was found that the corrosion rate decreased with an increase of chromium content in chemical composition of specimens. It was observed that Cr $_{2}$ O $_{3}$ formed on the surface of Cr, 55Ni-45Cr, and Inconel 690 specimens by immersed in Na $_{2}$ Mo $_{2}$ O $_{7}$ melt, which corrosion rates were low in the melt, and we presumed that this Cr $_{2}$ O $_{3}$ on the surface controlled the corrosion behavior of their material in the melt.

Language	:	Japanese
Journal	:	Nihon Genshiryoku Gakkai Wabun Rombunshi
Volume	:	12
Number	:	1
Pages	:	p.76 - 88
Publication Year/Month	:	2013/03
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Paper URL	:	https://doi.org/10.3327/taesj.J12.013
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Keywords	:	no keyword
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Registration No. : AA20120217
JAEA Abstracts No. : 41000625
Paper Submission No. : 12367

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