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Preparation method of uranium surface coating

A technology of surface coating and metal uranium, which is applied in the direction of coating, metal material coating process, etc., can solve the problems of shielding effect, large amount of waste generation, and high requirements for substrate pretreatment, so as to prevent leakage and reduce waste generation , The effect of the simple preprocessing process

Active Publication Date: 2013-03-13
SICHUAN INST OF MATERIALS & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing a uranium surface coating. The present invention can overcome the defects in the prior art, such as the shielding effect, excessively high substrate temperature, large waste generation, and high requirements for substrate pretreatment. The preparation method is provided with mercury protection and recovery content, which can avoid environmental pollution caused by mercury

Method used

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  • Preparation method of uranium surface coating

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Effect test

Embodiment 1

[0034] Weigh 5 grams of tin powder and 200 grams of mercury, put the weighed tin powder into the mercury, heat slowly and stir until the tin is completely dissolved, then cool naturally to room temperature for later use. Take 10 milliliters of mercury and put it into the infiltration chamber 7.

[0035] Clean the processed metal uranium plated parts with anhydrous alcohol to clean the oil stain on the surface first, and then clean it with nitric acid with a volume ratio of 1:1 between water and fuming nitric acid, until the surface of the metal uranium plated parts presents a silvery white metallic luster, accompanied by a small amount of air bubbles until produced. Take out the uranium-plated parts and clean them with absolute alcohol. Blot the residual alcohol on the surface of the uranium-plated parts with filter paper, quickly transfer to the infiltration chamber 7, encapsulate the uranium-plated parts in mercury, open the vacuum system 6, open the 1# valve 2, close the 2...

Embodiment 2

[0040] Weigh 4 grams of zinc pellets and 180 grams of mercury, put the weighed zinc pellets into the mercury, heat slowly and stir until the zinc is completely dissolved, and cool naturally to room temperature for later use. Take 10 milliliters of mercury and put it into the infiltration chamber 7.

[0041] Clean the processed metal uranium plated parts with anhydrous alcohol to clean the oil stain on the surface first, and then clean it with nitric acid with a volume ratio of 1:1 between water and fuming nitric acid, until the surface of the metal uranium plated parts presents a silvery white metallic luster, accompanied by a small amount of air bubbles until produced. Take out the uranium-plated parts and clean them with absolute alcohol. Blot the residual alcohol on the surface of the uranium-plated parts with filter paper, quickly transfer to the infiltration chamber 7, encapsulate the uranium-plated parts in mercury, open the vacuum system 6, open the 1# valve 2, close t...

Embodiment 3

[0046] Weigh 2 grams of gold and 5 milliliters of mercury, put the weighed gold into the mercury, heat slowly and stir until the gold is completely dissolved, then cool naturally to room temperature for later use. Take 10 milliliters of mercury and put it into the infiltration chamber 7.

[0047] Clean the processed metal uranium plated parts with anhydrous alcohol to clean the oil stain on the surface first, and then clean it with nitric acid with a volume ratio of 1:1 between water and fuming nitric acid, until the surface of the metal uranium plated parts presents a silvery white metallic luster, accompanied by a small amount of air bubbles until produced. Take out the uranium-plated parts and clean them with absolute alcohol. Blot the residual alcohol on the surface of the uranium-plated parts with filter paper, quickly transfer to the infiltration chamber 7, encapsulate the uranium-plated parts in mercury, open the vacuum system 6, open the 1# valve 2, close the 2# valve...

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Abstract

The invention discloses a preparation method of a uranium surface coating. The preparation method is characterized in that the method comprises the following steps of: immersing a pretreated plating in mercury, heating to the range of 195-205 DEG C under the vacuum condition of which the pressure is less than 3Pa, keeping the temperature for 0.5 hour, naturally cooling to the room temperature, taking out the plating, evenly coating the prepared pasty amalgam on the surface of the plating, heating to 170-200 DEG C under the vacuum condition of which the pressure is less than 3Pa, keeping the temperature for 0.5-1.0 hour, and condensing the mercury vapor to recycle. The preparation method of the coating has the advantages of no shielding effect, lower operating temperature, simple plating pretreatment method, fewer wastes, simplicity in operation, environmental protection, labor protection, and the like.

Description

technical field [0001] The invention belongs to the technical field of metal surface coating preparation, and in particular relates to a method for preparing a uranium surface coating. The invention is used for preparing metal and alloy protective coatings on the surface of metal uranium. Background technique [0002] Metal uranium has special physical and chemical properties and nuclear properties, and has been widely used in both military and national economic fields. However, due to the very active chemical properties of uranium, it is easily corroded by the ambient atmosphere, which not only affects normal use, It causes waste of materials, increases the workload of the nuclear fuel cycle, and also poses a great risk of radiation hazards to operators. The preparation of a protective coating on the surface of uranium can effectively prevent it from being corroded in the environment. [0003] For a long time, almost all technologies capable of preparing coatings on other m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C26/00
Inventor 沈崇雨陈亮李嵘李炬郎定木
Owner SICHUAN INST OF MATERIALS & TECH
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