A system and method for preparing a zirconium coating

A coating layer and powder technology, which is applied in the system field of preparing zirconium coating coatings, can solve the problems of low utilization rate of zirconium sources, high corrosion of containers, and difficulty in popularization, etc., and achieve production cost reduction and coating temperature Low, environmentally friendly effect

Active Publication Date: 2020-06-16
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Zr has many valence states (+4, +3, +2, +1), and it is difficult to directly convert +4 valence into 0 valence zirconium atoms during the electrodeposition process, and there are many intermediate valence states of zirconium atoms. Salt, resulting in a particularly low utilization rate of zirconium sources, and at the same time, the fluoride and chloride systems are highly corrosive to containers, and it is difficult to promote them in the industry
[0006] In summary, the traditional process of preparing Zr coating materials is costly and inefficient, which severely limits the industrial application of Zr coatings.

Method used

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  • A system and method for preparing a zirconium coating
  • A system and method for preparing a zirconium coating
  • A system and method for preparing a zirconium coating

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Experimental program
Comparison scheme
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Embodiment 1

[0030] combine figure 1 , the system for preparing the Zr cladding layer in this embodiment includes: a first powder silo 1, a gasification device 2, a fluidized bed 3, a second powder silo 4, a coating chamber 5, a substrate 6, and an exhaust gas treatment device 7;

[0031] The discharge port of the first powder silo 1 is connected to the feed port of the fluidized bed 3 through a pipeline and a material valve; the gas inlet of the gasification device 2 is connected with an inert gas through a pipeline and a gas valve Connect; the gas outlet of the gasification device 2 is connected with the gas inlet of the fluidized bed 3 through a pipeline and a gas valve; the gas inlet of the fluidized bed 3 is connected with an inert gas or H 2 Connected by a pipeline with a gas valve; the gas outlet of the fluidized bed 3 is connected with the tail gas treatment device 7 by a pipeline; the outlet of the fluidized bed 3 is connected with the inlet of the coating chamber 5 through The ...

Embodiment 2

[0033]In this embodiment, the method for preparing the Zr cladding layer using the system in the above-mentioned embodiment 1 specifically includes the following steps: the material in the first powder silo 1 enters the fluidized bed 3 through a pipeline and a material valve; Enter the gasification device 2, carry gaseous materials into the fluidized bed 3 at a certain temperature; inert gas or H 2 Enter the fluidized bed 3 and react at a certain temperature for a period of time; the gas in the fluidized bed 3 enters the tail gas treatment device 7 through a pipeline to realize the treatment and reuse of the tail gas; the base 6 is located in the package In the coating chamber 5; the reacted material in the fluidized bed 3 enters the coating chamber 5 through the material valve and the pipeline; the material in the second powder silo 4 enters the said coating chamber through the material valve and the pipeline In the cladding chamber 5, react at a certain temperature for a per...

Embodiment 3

[0035] In this embodiment, on the basis of the above-mentioned embodiment 2, the powder in the first powder silo 1 is sponge zirconium; the material in the gasification device 2 is zirconium tetrachloride, the temperature is 80°C, and the carrier gas is Ar; the temperature of the fluidized bed 3 is 750°C, and the reaction time is 60min; the fluidizing gas in the fluidized bed 3 is H 2 The material in the second powder silo 4 is a mixture of NaCl and KCl in an equimolar ratio; the substrate 6 in the coating chamber 5 is 316L stainless steel; the temperature of the coating chamber 5 is 350°C , the reaction time is 5min. figure 2 The SEM image of the prepared Zr-coated 316L stainless steel shows that 3-5nm nano-zirconium particles are deposited on the 316L substrate, and the deposition temperature is about 500°C lower than the traditional deposition temperature.

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Abstract

The invention discloses a system and method for preparing a zirconium coating. The initial zirconium source material is pretreated in a fluidized bed to obtain a precursor, and then the precursor is produced in a coating reactor to produce a zirconium coating. The preparation of the Zr cladding layer in the present invention has the following outstanding advantages: it can produce zirconium cladding coatings of various shapes and thicknesses in a low-cost, high-efficiency, and large-scale batch at a relatively low temperature, and the morphology, grain The particle size is controllable and has good economic and social benefits.

Description

technical field [0001] The invention belongs to the fields of chemical industry and materials, in particular to a system and method for preparing a zirconium coating. Background technique [0002] Metal zirconium has the characteristics of small neutron absorption cross section, excellent corrosion resistance, and good biocompatibility, and plays an important role in key components in nuclear reactors, chemical equipment, medical equipment, military industry and other fields. However, the preparation of zirconium metal is difficult and the parts are expensive, which limits the large-scale application in industry. In order to reduce costs and expand the scope of industrial applications, more and more people began to pay attention to the preparation technology of zirconium coating. At present, there are three main methods for preparing zirconium-coated materials: [0003] (1) Chemical vapor deposition coating method, the principle of which is that the gaseous zirconium sourc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F9/22
CPCB22F9/22B22F1/17
Inventor 向茂乔朱庆山赵宏丹宋淼
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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