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US 4,671,824 AGranted
Processes for producing improved wear resistant coatings on zirconium shapes
AssigneeTeledyne Industries, Inc.
InventorJohn C. Haygarth
Life of this patent
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Abstract
Process for producing zirconium oxide blue-black coatings on zirconium alloy substrates by treating said alloys with molten salts containing small amounts of oxidizing compounds. The molten salts are sodium cyanide and combinations of sodium chloride and potassium chloride.
Claims6
The process of producing a zirconium oxide wear resistant coating on a zirconium alloy surface comprising treating said alloy in a molten salt bath heated to a temperature of between 550.degree. and 800.degree. C. containing small amounts of sodium carbonate.
Dependencies are inferred from the claim text.