Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
Regular Articles
Hydrogen Permeability of Nitrided Stainless Steel
Takashi WATANABETeruya TANAKAAkio SAGARA
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JOURNAL FREE ACCESS

2013 Volume 8 Pages 2405076

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Abstract
The surface of a 316 stainless steel (316SS) specimen was nitrided by an electrochemical treatment in molten fluoride salt. Its hydrogen permeability was evaluated and compared with that of bare 316SS at temperature from 450C to 650C. When it was exposed to hydrogen pressure of 1.0 kPa from 450C to 650C, its permeability was 7.2×10−11 to 6.4×10−12 mol/sec.m.Pa1/2. The permeation flux was increased with temperature and the permeability is deviated from Sieverts’ law around 450C. It followed Sieverts’ law and was similar to that of bare 316SS at elevated temperatures. This result suggested the surface nitriding increases solubility at low temperatures around 450C.
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© 2013 by The Japan Society of Plasma Science and Nuclear Fusion Research
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