US2872343A - Method of protectively coating uranium - Google Patents
Method of protectively coating uranium Download PDFInfo
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- US2872343A US2872343A US654504A US65450446A US2872343A US 2872343 A US2872343 A US 2872343A US 654504 A US654504 A US 654504A US 65450446 A US65450446 A US 65450446A US 2872343 A US2872343 A US 2872343A
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- United States
- Prior art keywords
- uranium
- zinc
- bath
- coating
- coatings
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 229910052770 Uranium Inorganic materials 0.000 title claims description 43
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims description 43
- 238000000576 coating method Methods 0.000 title claims description 41
- 239000011248 coating agent Substances 0.000 title claims description 24
- 238000000034 method Methods 0.000 title claims description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 46
- 229910052725 zinc Inorganic materials 0.000 claims description 46
- 239000011701 zinc Substances 0.000 claims description 46
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 20
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 238000007598 dipping method Methods 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 6
- 230000004907 flux Effects 0.000 description 6
- 229910017604 nitric acid Inorganic materials 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000005554 pickling Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000001464 adherent effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- CKYKNSRRNDUJPY-UHFFFAOYSA-N alumane;uranium Chemical compound [AlH3].[U] CKYKNSRRNDUJPY-UHFFFAOYSA-N 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 238000003618 dip coating Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000635 Spelter Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012042 active reagent Substances 0.000 description 1
- 229910001514 alkali metal chloride Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/12—Aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C21/00—Apparatus or processes specially adapted to the manufacture of reactors or parts thereof
- G21C21/02—Manufacture of fuel elements or breeder elements contained in non-active casings
- G21C21/16—Manufacture of fuel elements or breeder elements contained in non-active casings by casting or dipping techniques
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/9335—Product by special process
- Y10S428/939—Molten or fused coating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12785—Group IIB metal-base component
- Y10T428/12792—Zn-base component
Definitions
- An object of the present invention is the provision of firmly adherent protective coatings on metallic uranium.
- a further object is the provision of such coatingssuitable for use as bases for the application of other metal coatings.
- a yet further object of the invention is the provision of zinc coatings on metallic uranium without the use of substantial proportions of aluminum in the zinc coating alloy to provide a uranium-aluminum alloy interlayer. 1
- the coatings of the invention provide very substantial protection for metallic uranium against the corrosive effects of the atmosphere and other active reagents.
- the zinc-coated uranium may be given a second coating with another metal more resistant to the corrosive influences particularly concerned.
- coatings of lead containing a small proportion of silver or tin, or aluminum containing a minor proportion of silicon may be applied over the zinc coatings.
- the coatings may be applied by dipping the uranium to be coated into a bath of zinc at a temperature between about 430 C. and 600 C.
- the bath may be provided with a standard flux, preferably as alkali-metal chloride flux melting at substantially below bath temperature, or it may be devoid of flux. 7
- the uranium may be prepared for coating by sandblasting or acid-pickling, preferably in warm strong nitric acid.
- Proportions are in terms of weight if not otherwise expressed.
- Example 1 A metallic uranium rod about two inches long and three-eighths of an inch in diameter was immersed in aqueous HNO solution at room temperature forabout 5 minutes to clean the metal surface and rinsed in water. The rod was then dipped for 30 seconds into a bath of pure zinc containing less than 0.007% lead, less than 0.005 iron, less than 0.005% cadmium, and more than 99.99% zinc. The zinc bath was at a temperature of 540 C. and was covered with a molten flux compris-' Example 2 Five metallic uranium rods were cleaned in 50% nitric acid solution as described in Example 1 and dipped into molten zinc baths of the same composition as employed in Example 1 using the same flux. The temperatures of the molten metal baths were 555 0, 505 C., 450 C I 440 C., and 433 C. In each case a uniform, continuous coating of the zinc directly on the metallic uranium was obtained.
- Example 3 A metallic uranium rod, after cleaning in aqueous 50% nitric acid solution, was dipped for 30 seconds in a zinc bath of the composition employed in Example 1, maintained at 560 C. and covered with a 37% lithium chloride, 53% potassium chloride, 10% sodium chloride flux. The rod was withdrawn from the bath, cooled in air for 10 seconds, and then rolled on Transite rolls until the coating solidified. The coated rod was quenched by immersion in water. The resulting rod, which was uniformly coated with zinc, was then dipped for 30 seconds into a molten lead bath comprising 98% lead and 2% PatenteclFeb. 3, 1959 A metallic uranium rod prepared for coating as described in Example 1 was dipped for 1% minutes in a zinc bath maintained at 500 to 510 C. The zinc bath was of the same high purity as employed in Example 1.
- rod was'then dipped into a bath comprising 88% aluminum and 12% silicon at a temperature of 620625 C. for between and 15 seconds, removed and dipped for 3 seconds into a second aluminum-silicon bath of the same composition maintained at 585 C. The rod was withdrawn from this second bath, rolled for 15 seconds on Transite rolls and then quenched in water. The rod was completely coated with aluminum-silicon alloy over a thin zinc interlayer.
- the method of protectively coating uranium which comprises preparing the uranium for coating and dipping the freshly prepared metal into a bath of molten zinc containing less than 0.01% each of iron and lead, said bath being at a temperature between 430 C. and 600 C., withdrawing the uranium coated with zinc and cooling it to solidify the coating.
- the method of protectively coating uranium which comprises pickling the uranium in strong nitric acid and dipping the freshly prepared metal into a bath of molten zinc containing less than 0.01% each of iron and lead,
- said bath being at a temperature between 430 C. andsaid bath beingv at a temperature between 430 C. and 600 C., withdrawing the uranium coated with zinc, dipping the zinc-coated uranium into a molten bath comprising 88% aluminum and 12% silicon at a temperature of about 620-625 C. for just sufficient time to provide complete coating, withdrawing the coated uranium from the aluminum-silicon bath and cooling it to solidify the composite coating.
- the method of protectively coating uranium which comprises pickling the uranium in strong nitric acid and dipping the freshly prepared metal into a bath of molten zinc containing less than 0.01% each of iron and lead, said bath being at a temperature between 430 C. and
- the method of protectively coating uranium which comprises pickling the uranium in strong nitric acid and dipping the freshly prepared metal into a bath of molten zinc containing less than 0.01% each of iron and lead, said bath being at a temperature between 430 C. and 600 C., withdrawing the uranium coated with zinc, dipping the zinc-coated uranium into a molten bath comprising approximately 98% lead and 2% silver, said bath being ata temperature below the melting point of zinc, withdrawing the coated uranium and cooling it to solidify the composite coating.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Manufacturing & Machinery (AREA)
- Coating With Molten Metal (AREA)
Description
METHOD OF PROTECTIVELY COATING URANIUM Lowell D. Eubank, South Euclid, Ohio, and Ernest R. Boiler, Marion, Ind., assignors to the United States of America as represented by the United States Atomic Energy Commission No Drawing. Application March 14, 1946 Serial No. 654,504
Claims. (Cl. 117-51) This invention relates to the coating of metallic uranium. Coated metallic uranium articles are useful as fuel elements in neutronic reactors of the type described in the co-pending application of Fermi et al. Serial -No. 568,904, filed December 19, 1944, now Patent No. 2,708,656, granted May 17, 1955.
Early attempts to coat metallic uranium with zinc met with unsatisfactory results because of the failure of the zinc to coat the metal uniformly. Coatings applied by dipping the metallic uraninum into molten baths of zinc of the composition normally employed in the application of Zinc coatings to steel and similar metals resulted in only spotty coverage of the metallic uranium. In accordance with the teachings of our United States patent application Serial Number 588,060, filed April 12, 1945, now Patent No. 2,848,796, granted August 26, 1958, we have found that satisfactorily adherent coatings of zinc can be applied provided a substantial proportion of aluminum is present in the molten zinc so as to form a uranium-aluminum alloy layer between the metallic uranium and the zinc. For some purposes, the alloy coatings of zinc containing aluminum are as satisfactory as zinc coatings or superior to zinc coatings. For some purposes, however, the presence of aluminum is objectionable.
An object of the present invention is the provision of firmly adherent protective coatings on metallic uranium. A further object is the provision of such coatingssuitable for use as bases for the application of other metal coatings. A yet further object of the invention is the provision of zinc coatings on metallic uranium without the use of substantial proportions of aluminum in the zinc coating alloy to provide a uranium-aluminum alloy interlayer. 1
In accordance with the present invention it has been discovered that by employing a zinc which is free from lead and iron impurities, continuous coatings of zinc on metallic uranium may be applied without the use of an aluminum alloy. Commercial zinc normally employed for the application. of hot dip coatings may contain up to 1.6% of lead and up to 0.08% of iron. Such zinc compositions result in the spotty coatings previously referred to. We have found that by employing a zinc which contains less than 0.01% of lead and less than 0.01% of iron and preferably less than 0.01% total of lead, iron and cadmium, very uniform continuous coatings of zinc firmly adhering directly to the uranium may be applied.
The coatings of the invention provide very substantial protection for metallic uranium against the corrosive effects of the atmosphere and other active reagents.
For special purposes the zinc-coated uranium may be given a second coating with another metal more resistant to the corrosive influences particularly concerned. Thus coatings of lead containing a small proportion of silver or tin, or aluminum containing a minor proportion of silicon may be applied over the zinc coatings.
The coatings may be applied by dipping the uranium to be coated into a bath of zinc at a temperature between about 430 C. and 600 C. The bath may be provided with a standard flux, preferably as alkali-metal chloride flux melting at substantially below bath temperature, or it may be devoid of flux. 7
The uranium may be prepared for coating by sandblasting or acid-pickling, preferably in warm strong nitric acid.
The following examples will illustrate the invention.
Proportions are in terms of weight if not otherwise expressed.
Example 1 A metallic uranium rod about two inches long and three-eighths of an inch in diameter was immersed in aqueous HNO solution at room temperature forabout 5 minutes to clean the metal surface and rinsed in water. The rod was then dipped for 30 seconds into a bath of pure zinc containing less than 0.007% lead, less than 0.005 iron, less than 0.005% cadmium, and more than 99.99% zinc. The zinc bath was at a temperature of 540 C. and was covered with a molten flux compris-' Example 2 Five metallic uranium rods were cleaned in 50% nitric acid solution as described in Example 1 and dipped into molten zinc baths of the same composition as employed in Example 1 using the same flux. The temperatures of the molten metal baths were 555 0, 505 C., 450 C I 440 C., and 433 C. In each case a uniform, continuous coating of the zinc directly on the metallic uranium was obtained.
When an attempt was made to coat metallic uranium with an ordinary hot dip coating zinc (Prim-e Western Spelter) under the conditions described in this example,- only spotty coatings could be obtained. Portions of the metallic uranium surface remained exposed after the coating operation in every case.
The following examples illustrate the application of I multiple coatings employing azinc coating as base.
Example 3 Example 4 A metallic uranium rod, after cleaning in aqueous 50% nitric acid solution, was dipped for 30 seconds in a zinc bath of the composition employed in Example 1, maintained at 560 C. and covered with a 37% lithium chloride, 53% potassium chloride, 10% sodium chloride flux. The rod was withdrawn from the bath, cooled in air for 10 seconds, and then rolled on Transite rolls until the coating solidified. The coated rod was quenched by immersion in water. The resulting rod, which was uniformly coated with zinc, was then dipped for 30 seconds into a molten lead bath comprising 98% lead and 2% PatenteclFeb. 3, 1959 A metallic uranium rod prepared for coating as described in Example 1 was dipped for 1% minutes in a zinc bath maintained at 500 to 510 C. The zinc bath was of the same high purity as employed in Example 1.
After 1% minutes in this bath the rod was removed and centrifuged for 8 seconds at 640 revolutions per minute in a centrifuge in which it was suspended coaxially at a distance of about 6 inches from the axis of rotation. The
rod was'then dipped into a bath comprising 88% aluminum and 12% silicon at a temperature of 620625 C. for between and 15 seconds, removed and dipped for 3 seconds into a second aluminum-silicon bath of the same composition maintained at 585 C. The rod was withdrawn from this second bath, rolled for 15 seconds on Transite rolls and then quenched in water. The rod was completely coated with aluminum-silicon alloy over a thin zinc interlayer.
It will be understood that we intend to include variations and modifications of the invention and that the preceding examples are illustrations only and in no wise to be construed as limitations upon the invention, the scope of which is defined in the appended claims, wherein we claim:
1. The method of protectively coating uranium, which comprises preparing the uranium for coating and dipping the freshly prepared metal into a bath of molten zinc containing less than 0.01% each of iron and lead, said bath being at a temperature between 430 C. and 600 C., withdrawing the uranium coated with zinc and cooling it to solidify the coating.
2. The method of protectively coating uranium, which comprises pickling the uranium in strong nitric acid and dipping the freshly prepared metal into a bath of molten zinc containing less than 0.01% each of iron and lead,
said bath being at a temperature between 430 C. andsaid bath beingv at a temperature between 430 C. and 600 C., withdrawing the uranium coated with zinc, dipping the zinc-coated uranium into a molten bath comprising 88% aluminum and 12% silicon at a temperature of about 620-625 C. for just sufficient time to provide complete coating, withdrawing the coated uranium from the aluminum-silicon bath and cooling it to solidify the composite coating.
4. The method of protectively coating uranium, which comprises pickling the uranium in strong nitric acid and dipping the freshly prepared metal into a bath of molten zinc containing less than 0.01% each of iron and lead, said bath being at a temperature between 430 C. and
600 C., withdrawing the uranium coated With zinc, dipping the zinc-coated uranium into a molten bath comprising approximately 90% lead and 10% tin at a temperature of approximately 350 C. withdrawing the coated uranium and cooling it to solidify the composite coating.
5. The method of protectively coating uranium, which comprises pickling the uranium in strong nitric acid and dipping the freshly prepared metal into a bath of molten zinc containing less than 0.01% each of iron and lead, said bath being at a temperature between 430 C. and 600 C., withdrawing the uranium coated with zinc, dipping the zinc-coated uranium into a molten bath comprising approximately 98% lead and 2% silver, said bath being ata temperature below the melting point of zinc, withdrawing the coated uranium and cooling it to solidify the composite coating.
References Cited in the file of this patent UNITED STATES PATENTS 547,381 McKnight Oct. 1, 1895 927,372 Monnot July 6, 1909 1,114,792 Monnot Oct. 27, 1914 1,497,265 Haas June 10, 1924 1,597,189 Gero Aug. 24, 1926 1,869,784 Theiss Aug. 2, 1932 1,982,563 Wimmer Nov. 27, 1934 2,231,967 Tainton Feb. 18, 1941 2,276,101 Schueler Mar. 10, 1942 2,299,166 Miller Oct. 20, 1942 2,307,243 Slagle Jan. 5, 1943 2,396,730 Whitfield et a1 Mar. 19, 1946 OTHER REFERENCES Metals Handbook,- 1939 edition, page 1736. Protective Coatings for Metals, Burns and Schuh, 1939, pages 60, 61, 64, 65, 94 and 101.
Claims (1)
1. THE METHOD OF PROTECTIVELY COATING URANIUM, WHICH COMPRISES PREPARING THE URANIUM FOR COATING AND DIPPING THE FRESHLY PREPARED METAL INTO A BATH OF MOLTEN ZINC CONTAINING LESS THAN 0.01% EACH OF IRON AND LEAD, SAID BATH BEING AT A TEMPERATURE BETWEEN 430*C. AND 600*C., WITHDRAWING THE URANIUM COATED WITH ZINC AND COOLING IT TO SOLIDIFY THE COATING.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US654504A US2872343A (en) | 1946-03-14 | 1946-03-14 | Method of protectively coating uranium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US654504A US2872343A (en) | 1946-03-14 | 1946-03-14 | Method of protectively coating uranium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2872343A true US2872343A (en) | 1959-02-03 |
Family
ID=24625147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US654504A Expired - Lifetime US2872343A (en) | 1946-03-14 | 1946-03-14 | Method of protectively coating uranium |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2872343A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3849867A (en) * | 1957-10-02 | 1974-11-26 | Atomic Energy Commission | Process of jacketing fuel elements |
| US4104121A (en) * | 1972-06-02 | 1978-08-01 | Groupement Atomique Alsacienne Atlantique | Solid absorbent safety device for a nuclear reactor |
| CN108559965A (en) * | 2018-07-25 | 2018-09-21 | 中国工程物理研究院激光聚变研究中心 | A kind of method that metal uranium surface prepares anti-oxidant uranium tantalum films |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US547381A (en) * | 1895-10-01 | Robert mcknight | ||
| US927372A (en) * | 1908-06-19 | 1909-07-06 | Duplex Metals Company | Clad metal. |
| US1114792A (en) * | 1905-10-06 | 1914-10-27 | Duplex Metals Company | Method of making clad metals. |
| US1497265A (en) * | 1922-09-16 | 1924-06-10 | Roessler And Hasslacher Chemic | Zinc-electroplated articles |
| US1597189A (en) * | 1921-01-11 | 1926-08-24 | Westinghouse Lamp Co | Method of cold-drawing refractory materials |
| US1869784A (en) * | 1928-01-25 | 1932-08-02 | Harry W Theiss | Process of metal coating |
| US1982563A (en) * | 1929-12-23 | 1934-11-27 | Wimmer Anton | Method of plating iron with aluminum and product thereof |
| US2231967A (en) * | 1937-04-24 | 1941-02-18 | Tainton Urlyn Clifton | Zinc coated article |
| US2276101A (en) * | 1939-02-16 | 1942-03-10 | Julian L Schueler | Art of treating and coating metals |
| US2299166A (en) * | 1940-07-30 | 1942-10-20 | Aluminum Co Of America | Brazing light metals |
| US2307243A (en) * | 1940-12-16 | 1943-01-05 | Beryllium Corp | Drawing be-containing alloys |
| US2396730A (en) * | 1941-10-24 | 1946-03-19 | Al Fin Corp | Coating metal |
-
1946
- 1946-03-14 US US654504A patent/US2872343A/en not_active Expired - Lifetime
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US547381A (en) * | 1895-10-01 | Robert mcknight | ||
| US1114792A (en) * | 1905-10-06 | 1914-10-27 | Duplex Metals Company | Method of making clad metals. |
| US927372A (en) * | 1908-06-19 | 1909-07-06 | Duplex Metals Company | Clad metal. |
| US1597189A (en) * | 1921-01-11 | 1926-08-24 | Westinghouse Lamp Co | Method of cold-drawing refractory materials |
| US1497265A (en) * | 1922-09-16 | 1924-06-10 | Roessler And Hasslacher Chemic | Zinc-electroplated articles |
| US1869784A (en) * | 1928-01-25 | 1932-08-02 | Harry W Theiss | Process of metal coating |
| US1982563A (en) * | 1929-12-23 | 1934-11-27 | Wimmer Anton | Method of plating iron with aluminum and product thereof |
| US2231967A (en) * | 1937-04-24 | 1941-02-18 | Tainton Urlyn Clifton | Zinc coated article |
| US2276101A (en) * | 1939-02-16 | 1942-03-10 | Julian L Schueler | Art of treating and coating metals |
| US2299166A (en) * | 1940-07-30 | 1942-10-20 | Aluminum Co Of America | Brazing light metals |
| US2307243A (en) * | 1940-12-16 | 1943-01-05 | Beryllium Corp | Drawing be-containing alloys |
| US2396730A (en) * | 1941-10-24 | 1946-03-19 | Al Fin Corp | Coating metal |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3849867A (en) * | 1957-10-02 | 1974-11-26 | Atomic Energy Commission | Process of jacketing fuel elements |
| US4104121A (en) * | 1972-06-02 | 1978-08-01 | Groupement Atomique Alsacienne Atlantique | Solid absorbent safety device for a nuclear reactor |
| CN108559965A (en) * | 2018-07-25 | 2018-09-21 | 中国工程物理研究院激光聚变研究中心 | A kind of method that metal uranium surface prepares anti-oxidant uranium tantalum films |
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