Published April 5, 1991 | Version v1
Patent Metadata-only

Superficial oxydation process of a metallic piece to passivate and fuel assemblies in metallic alloy coating by an oxyde protective layer

Creators

Description

Oxydation treatments by electronic bombardment form on metal or alloy surfaces a film of oxyde which improve resistance to ulterior corrosion. The oxyde films are produced by activating a gas containing oxygen electrically and producing a plasma which then contacts with the metal surface which has been heated to 350-6500 C

Availability note (English)

Available from Institut National de la Propriete Industrielle, Paris (France).

Abstract (French)

Les traitements d'oxydation par bombardement ionique ou post-decharge conduisent a la formation a la surface des metaux et alliages passivables d'une couche d'oxyde de quelques micrometres d'epaisseur qui protege les substrats de la corrosion ulterieure. On met en contact le gaz active par la decharge electrique avec la surface de la piece a oxyder portee a une temperature comprise entre 350 et 6500 C. L'invention peut etre utilisee, en particulier, pour former un revetement protecteur sur un element ou une ossature complete en alliage de zirconium d'un assemblage combustible d'un reacteur nucleaire refroidi a l'eau

Additional details

Additional titles

Original title (French)
Procede d'oxydation superficielle d'une piece en metal passivable, et elements d'assemblage combustible en alliage metallique revetus d'une couche d'oxyde protectrice

Publishing Information

Imprint Pagination
21 p.
IPC:
Int. Cl. C23c8/36; C23c8/12; G21c3/07.
IPC
Int. Cl. C23c8/36; C23c8/12; G21c3/07.
Patent number
FR patent document 2652591/A/

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
23059501
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
CORROSION; ELECTRIC DISCHARGES; FUEL ASSEMBLIES; OXYGEN; PLASMA ARC SPRAYING; PROTECTIVE COATINGS; PWR TYPE REACTORS
Descriptors DEC
CHEMICAL REACTIONS; COATINGS; DEPOSITION; ELEMENTS; ENRICHED URANIUM REACTORS; NONMETALS; POWER REACTORS; REACTORS; SPRAY COATING; SURFACE COATING; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS

Optional Information

Secondary number(s)
FR patent application 8912920.