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
- Application Number:
- TRN: 82-018207
- OSTI ID:
- 5170359
- Resource Relation:
- Patent File Date: Filed date 7 Jan 1981; Other Information: PAT-APPL-222865
- Country of Publication:
- United States
- Language:
- English
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Method for providing uranium articles with a corrosion resistant anodized coating
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Related Subjects
36 MATERIALS SCIENCE
URANIUM
ANODIZATION
CORROSION PROTECTION
SURFACE COATING
AMMONIUM HYDROXIDES
AQUEOUS SOLUTIONS
BORATES
BORIC ACID
CORROSION RESISTANCE
CURRENT DENSITY
ELECTRIC CURRENTS
ELECTROLYSIS
ELECTROLYTES
OXIDES
PH VALUE
POTASSIUM COMPOUNDS
POTASSIUM HYDROXIDES
POTASSIUM PHOSPHATES
SURFACE AREA
ACTINIDES
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
BORON COMPOUNDS
CHALCOGENIDES
CHEMICAL COATING
CURRENTS
DEPOSITION
DISPERSIONS
ELECTROCHEMICAL COATING
ELEMENTS
HYDROGEN COMPOUNDS
HYDROXIDES
INORGANIC ACIDS
LYSIS
METALS
MIXTURES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
SOLUTIONS
SURFACE PROPERTIES
050700* - Nuclear Fuels- Fuels Production & Properties
360105 - Metals & Alloys- Corrosion & Erosion