Journal of The Surface Finishing Society of Japan
Online ISSN : 1884-3409
Print ISSN : 0915-1869
ISSN-L : 0915-1869
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Volume 74, Issue 6
Displaying 1-8 of 8 articles from this issue
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Special Feature / Surface Technologies for Power Electronics and Power Devices
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Research Papers
  • Effect of Chromium Oxide Film Formation, Mainly by the INCO Method, on Hydrogen Permeability on Welded Type 304 Stainless Steel
    Kazuyoshi KAWAMI, Atsushi KINOSHITA, Hiroyasu TAMAI, Toshiyuki TANAKA, ...
    2023 Volume 74 Issue 6 Pages 328-334
    Published: June 01, 2023
    Released on J-STAGE: June 23, 2023
    DOIhttps://doi.org/10.4139/sfj.74.328
    JOURNAL FREE ACCESS
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    This study assessed surface treatment techniques applicable to welded joints of stainless steel pipes and vessels for a hydrogen-permeation barrier. Specifically investigated was electrolytic polishing using electrolyte compositions consisting of sulfuric acid, phosphoric acid, and methane-sulfonic acid to promote uniform passive film formation on a type 304 stainless steel surface. This study also examined oxidation treatment using a combination of chemical oxidation, cathodic electrolysis, and passivation. Hydrogen gas permeation suppression was confirmed for welded SUS304 steel substrates treated under selected conditions suitable for thickening, homogenizing, and densifying passivation films.

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