Title:
PROCESS FOR FORMING PASSIVE FILM ON STAINLESS STEEL, AND STAINLESS STEEL AND GAS- AND LIQUID-CONTACTING PART
Document Type and Number:
WIPO Patent Application WO/1992/021786
Kind Code:
A1
Abstract:
A process for forming a passive film excellent in degasifiability and corrosion resistance by making the film extremely flat and dense. The process comprises subjecting the surface of stainless steel to electrolytic polishing, oxidation in an oxidative atmosphere and removal of iron oxide formed thereon by reduction with hydrogen.
Inventors:
OHMI TADAHIRO (JP)
NAKAMURA MASAKAZU (JP)
NAKAMURA MASAKAZU (JP)
Application Number:
PCT/JP1992/000699
Publication Date:
December 10, 1992
Filing Date:
May 28, 1992
Export Citation:
Assignee:
OSAKA OXYGEN IND (JP)
OHMI TADAHIRO (JP)
OHMI TADAHIRO (JP)
International Classes:
C21D1/76; C21D6/00; C23C8/02; C23C8/14; C23C8/80; C23C22/00; C25F3/06; C21D1/74; (IPC1-7): C21D6/00; C23C8/14; C23C8/80
Foreign References:
| JPS6431956A | 1989-02-02 | |||
| JPH0243353A | 1990-02-13 |
Other References:
See also references of EP 0596121A4
Attorney, Agent or Firm:
Fukumori, Hisao (Shinjuku-ku, Tokyo 160, JP)
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