| (19) |
 |
|
(11) |
EP 1 236 813 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
13.08.2003 Bulletin 2003/33 |
| (43) |
Date of publication A2: |
|
04.09.2002 Bulletin 2002/36 |
| (22) |
Date of filing: 28.02.2002 |
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|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
02.03.2001 JP 2001058253
|
| (71) |
Applicant: Japan Atomic Energy Research Institute |
|
Chiyoda-ku, Tokyo (JP) |
|
| (72) |
Inventors: |
|
- Kawamura, Hiroshi, c/o Japan Atomic Energy Rch Ins
Higashi-Ibaraki-gun, Ibaraki-ken (JP)
- Nakamichi, Masaru, c/o Japan Atomic Energy Rch Ins
Higashi-Ibaraki-gun, Ibaraki-ken (JP)
- Tani, Kazumi, c/o Tocalo Co. Ltd.
Kobe-shi, Hyogo-ken (JP)
- Miyajima, Kiyoshi, c/o Tocalo Co. Ltd.
Kobe-shi, Hyogo-ken (JP)
- Teratani, Takema, c/o Tocalo Co. Ltd.
Kobe-shi, Hyogo-ken (JP)
|
| (74) |
Representative: Pfenning, Meinig & Partner |
|
Mozartstrasse 17
80336 München
80336 München (DE) |
|
| |
|
| (54) |
Members coated with composite oxide coatings for preventing the permeation of hydrogen
isotopes and a process for producing such members |
(57) The surface of a chemical densified coating formed on the surface of a stainless
steel substrate is coated or sprayed with an aqueous solution based on chromic acid
and a material capable of forming an amorphous inorganic substance upon sintering
or the chemical densified coating is dipped in the aqueous solution and recovered;
the chemical densified coating is then sintered by heating at 250 - 750°C so that
the pores and cracks in the chemical densified coating are filled with the fine particles
of a composite of chromium oxide and an amorphous inorganic material and that the
surface of the chemical densified coating is covered with a layer of such fine particles.