Published December 27, 1990 | Version v1
Patent Metadata-only

Process for the dissolution of an oxide deposited on a metallic substrate and application to decontamination

Creators

Description

The surface to decontaminate is treated by an oxidizing solution containing a permanganate at a pH value between 2 and 6, preferentially 2 to 4, oxidizing Cr 3+ into Cr 6+ and the oxide solubilized with a reducing organic compound easy to decompose, eg. ascorbic acid. Especially for decontamination of primary coolant circuit of steam generators

Availability note (English)

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

Abstract (French)

La surface a decontaminer est traitee par une solution oxydante contenant un permanganate a un pH compris entre 2 et 6, de preference 2 et 4, qui oxyde Cr 3+ en Cr 6+, et l'oxyde est dissous avec un compose organique reducteur facile a decomposer, p. ex l'acide ascorbique. Peut etre utilise pour decontaminer le circuit primaire d'un generateur de vapeur

Additional details

Additional titles

Original title (French)
Procede de dissolution d'oxyde depose sur un substrat metallique et son application a la decontamination

Publishing Information

Imprint Pagination
19 p.
IPC:
Int. Cl. G21f9/30.
IPC
Int. Cl. G21f9/30.
Patent number
FR patent document 2648946/A/

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
22060126
Subject category
S61: RADIATION PROTECTION AND DOSIMETRY;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
DECONTAMINATION; DISSOLUTION; EFFICIENCY; OXIDES; OXIDIZERS; REDUCING AGENTS; SURFACE CLEANING
Descriptors DEC
CHALCOGENIDES; CLEANING; OXYGEN COMPOUNDS; SURFACE FINISHING

Optional Information

Secondary number(s)
FR patent application 8908524.