Process for the surface oxidation of a part composed of passivatable metal, and fuel assembly elements composed of metal alloy covered with a protective oxide layer
US5328524A · kind A · utility
14Cited by
6References
6Claims
0Family size
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Key dates
| Filing date | Oct 3, 1990 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Oct 3, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Oxidation treatments by ionic bombardment or post-discharge result in the formation on the surface of passivatable metals and alloys of a layer of oxide having a thickness of a few micrometers which protects the substrates from subsequent corrosion. The gas activated by the electric discharge is put in contact with the surface of the part (2) to be oxidized, which is brought to a temperature of 350.degree. to 650.degree. C. The treatment may be employed in particular for forming a protective covering on an element or a complete framework composed of a zirconium alloy of a fuel assembly of a water-cooled nuclear reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.