Method for providing uranium articles with a corrosion resistant anodized coating
Uranium articles are provided with anodized oxide coatings in an aqueous solution of an electrolyte selected from the group consisting of potassium phosphate, potassium hydroxide, ammonium hydroxide, and a mixture of potassium tetraborate and boric acid. The uranium articles are anodized at a temperature greater than about 75 degrees C. With a current flow of less than about 0.036 A/cm2 of surface area while the Ph of the solution is maintained in a range of about 2 to 11.5. The Ph values of the aqueous solution and the low current density utilized during the electrolysis prevent excessive dissolution of the uranium and porosity in the film or watering. The relatively high temperature of the electrolyte bath inhibits hydration and the attendant deleterious pitting so as to enhance corrosion resistance of the anodized coating.
- Assignee:
- Dept. Of Energy
- Patent Number(s):
- US 4325791
- OSTI ID:
- 5170359
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ACTINIDES
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
AMMONIUM HYDROXIDES
ANODIZATION
AQUEOUS SOLUTIONS
BORATES
BORIC ACID
BORON COMPOUNDS
CHALCOGENIDES
CHEMICAL COATING
CORROSION PROTECTION
CORROSION RESISTANCE
CURRENT DENSITY
CURRENTS
DEPOSITION
DISPERSIONS
ELECTRIC CURRENTS
ELECTROCHEMICAL COATING
ELECTROLYSIS
ELECTROLYTES
ELEMENTS
HYDROGEN COMPOUNDS
HYDROXIDES
INORGANIC ACIDS
LYSIS
METALS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PHOSPHATES
PHOSPHORUS COMPOUNDS
POTASSIUM COMPOUNDS
POTASSIUM HYDROXIDES
POTASSIUM PHOSPHATES
SOLUTIONS
SURFACE AREA
SURFACE COATING
SURFACE PROPERTIES
URANIUM