Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Patent
1990-10-03
1994-07-12
Silverberg, Sam
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
148281, C23C 836
Patent
active
053285247
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.
REFERENCES:
patent: 3615885 (1971-10-01), Watson
patent: 3658672 (1972-04-01), Norris
patent: 4232057 (1980-11-01), Ray
patent: 4585541 (1986-04-01), Miyake et al.
patent: 4589929 (1986-05-01), Steinberg
patent: 5062900 (1991-11-01), Berneron
Chemical Abstracts-vol. 101, 1984, p. 280.
"Oxidation coloring method of titanium by low temperature plasma".
"Method and device for surface processing by glow electric discharge".
Cogema
Framatome
Silverberg Sam
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