METHOD FOR PREVENTING CORROSION OF FORCED COOLING TYPE INDUCTION-HEATING CRUCIBLE MADE FROM COPPER

• Main Authors: SUENAGA HIROYOSHI, URABE NAMIO, YANAGI EIICHI
• Format: Patent
• Language: English
• Published: 26.12.2002
• Edition: 7
• Subjects: BLASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; DIFFUSION TREATMENT OF METALLIC MATERIAL; FURNACES; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; KILNS; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; OPEN SINTERING OR LIKE APPARATUS; OVENS; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; RETORTS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; WEAPONS

PROBLEM TO BE SOLVED: To improve corrosion resistance of a forced cooling type induction- heating crucible made from copper, used for reprocessing of a spent nuclear fuel. SOLUTION: The method for preventing corrosion of a forced cooling type induction-heating crucible made from copper, used for dissolving a halogen compound, is characterized by arranging an anticorrosion layer of a metal with thermal conductivity of 5 W/m.K or higher, on the surface of the above crucible. The metal is preferably a Ni-based high alloy. The anticorrosion layer preferably comprises three layers consisting of a layer closest to the surface of the crucible having void fraction of 7.5%, a layer having void fraction of 8.5% or higher thereon, and a layer having void fraction of 5.5% or lower further thereon.