Patent Number: 
Section: claims

1. A metallic uranium article having a protective coating of a copper-tin alloy containing from 45 to 50% by weight of copper and from 55 to 50% by weight of tin, said alloy being firmly bonded to the metallic uranium. 2. A metallic uranium article having a protective coating consisting of aluminum separated from the uranium by an interlayer of an alloy containing copper and tin a weight ratio of from 20 to 75 of copper to form 80 to 25 of tin. 3. A metallic uranium article having a protective coating comprising a layer of substantially pure aluminum bonded to the uranium by a layer of lower melting aluminum-silicon alloy containing from 10 to 15% by weight of silicon and from 90 to 85% of aluminum, said latter alloy being separated from the uranium by a substantially thinner layer or copper alloy containing about 33% of tin. 4. A metallic uranium article having a protective coating of a ternary alloy containing from 0.5 to 5% nickel and copper and tin in a weight ratio of from 20 to 75 of copper to from 80 to 25 of tin. 5. A uranium article coated with an alloy consisting sub-stantially of 67% by weight of copper and 33% by weight of tin. 6. A uranium article coated with an alloy consisting sub-stantially of 47% by weight of copper and 53% by weight of tin. 7. A uranium article coated with an alloy consisting sub-stantially of 57% by weight of copper and 43% by weight of tin. 8. A uranium article coated with an aluminum-base metal and a layer of a copper-tin alloy containing copper and tin in a weight ratio of from 20 to 75 of copper to from 80 to 25 of tin therebetween. 9. The article of  claim 8 , in which the aluminum-base metal is an aluminum-silicon alloy containing from 5 to 20% of silicon and from 95 to 80% of aluminum. claim 8 10. The article of  claim 9  wherein the aluminum-base metal is ternary and contains from 10% to 15% silicon from 89.9 to 84.9% aluminum and about 0.1% sodium. claim 9 11. The article of  claim 10  wherein the silicon content is 12% by weight. claim 10 12. A metallic uranium article having a protective coating of a ternary alloy containing approximately 1% of aluminum and copper and tin in a weight ratio of from 20 to 75 copper to from 80 to 25 tin.