Preparation method of protective coating material for zirconium alloy cladding pipe

A protective coating, zirconium alloy technology, applied in metal material coating process, coating, powder coating and other directions, can solve the problems of reducing the mechanical properties of the cladding, thinning the thickness of the cladding, and becoming brittle, and achieves spray coating. The method is simple and feasible, the effect of good resistance to high temperature water vapor, and excellent thermal shock resistance

Active Publication Date: 2017-06-20
陕西华秦科技实业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the zirconium alloy cladding tube is working in the reactor, it is subjected to strong neutron irradiation, high temperature and high pressure water, and fission product erosion and erosion, the strength increases, the ductility decreases, the corrosion problem is aggravated, distortion occurs, and the surface oxide layer falls off, etc. Phenomenon, eventually failure and cause nuclear leakage accident
The corrosion of the zirconium alloy cladding tube will have an adverse effect on the performance of the fuel rod: the thickness of the cladding will be thinned, the mechanical properties of the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0054] Example 1

[0055] Use 3Al with a particle size of 1μm~15μm 2 O 3 ·2SiO 2 Powder, weigh 3Al according to mass percentage 2 O 3 ·2SiO 2 Powder 35%, water 64%, polyvinyl alcohol 1%, the total content of the above three substances is 100%;

[0056] 3Al to be weighed 2 O 3 ·2SiO 2 Mix powder, water and polyvinyl alcohol to obtain a mixture; stir the mixture to make 3Al 2 O 3 ·2SiO 2 The powder, water and polyvinyl alcohol are mixed uniformly; the spray-drying granulator is used to granulate the stirred mixture; after sieving, 3Al with a particle size of 30μm~60μm is obtained 2 O 3 ·2SiO 2 Agglomerated powder

[0057] Place the zirconium alloy cladding tube in a sandblasting machine, and make the zirconium alloy cladding tube rotate at a speed of 20r / min. The spray gun with built-in SiC grit is facing the zirconium alloy cladding tube at a speed of 20cm / min along the zirconium alloy The cladding tube moves axially to spray SiC grit to the zirconium alloy cladding tube, from one end...

Example Embodiment

[0060] Example 2

[0061] Using MgAl with a particle size of 1μm~10μm 2 O 4 Powder, weigh MgAl according to mass percentage 2 O 4 30% powder, 69% water, 1% polyvinyl alcohol, the total content of the above three substances is 100%;

[0062] MgAl to be weighed 2 O 4 Mix powder, water and polyvinyl alcohol to obtain a mixture; stir the mixture to make MgAl 2 O 4 The powder, water and polyvinyl alcohol are mixed uniformly; the spray-drying granulator is used to granulate the stirred mixture; after sieving, MgAl with a particle size of 30μm~60μm is obtained 2 O 4 Agglomerated powder

[0063] Place the zirconium alloy cladding tube in the sandblasting machine, and make the zirconium alloy cladding tube rotate at a speed of 35r / min. The spray gun with built-in SiC grit is facing the zirconium alloy cladding tube at a speed of 35cm / min along the zirconium alloy The cladding tube moves axially to spray SiC grit to the zirconium alloy cladding tube, from one end of the zirconium alloy claddin...

Example Embodiment

[0066] Example 3

[0067] The raw material for the protective coating is 2MgO·2Al with a particle size of 0.5μm~5μm 2 O 3 ·5SiO 2 Powder, weigh 2MgO·2Al according to mass percentage 2 O 3 ·5SiO 2 29% powder, 70% water, 1% polyvinyl alcohol, the total content of the above three substances is 100%;

[0068] 2MgO·2Al to be weighed 2 O 3 ·5SiO 2 Mix powder, water and polyvinyl alcohol to obtain a mixture; stir the mixture to make 2MgO·2Al 2 O 3 ·5SiO 2 The powder, water and polyvinyl alcohol are mixed uniformly; the spray-drying granulator is used to granulate the stirred mixture; after sieving, 2MgO·2Al with a particle size of 40μm~70μm is obtained 2 O 3 ·5SiO 2 Agglomerated powder

[0069] Place the zirconium alloy cladding tube in the sandblasting machine, and make the zirconium alloy cladding tube rotate at a speed of 30r / min. The spray gun with built-in SiC grit is facing the zirconium alloy cladding tube at a speed of 30cm / min along the zirconium alloy The cladding tube moves axial...

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Abstract

The invention discloses a preparation method of a protective coating material for a zirconium alloy cladding pipe. Specifically, the preparation method comprises the following steps: mixing a main material for a protective coating, water and polyvinyl alcohol to obtain a mixed material; carrying out two types of post-treatment on the mixed material to obtain an agglomerated powdery protective coating raw material for the zirconium alloy cladding pipe or a suspension-shaped protective coating raw material for the zirconium alloy cladding pipe; taking the zirconium alloy cladding pipe and carrying out sand spraying treatment on an outer wall of the zirconium alloy cladding pipe; spraying the agglomerated powdery protective coating raw material for the zirconium alloy cladding pipe or the suspension-shaped protective coating raw material for the zirconium alloy cladding pipe on the outer wall of the zirconium alloy cladding pipe subjected to blast sanding treatment by adopting a thermal spraying technology, so as to form the protective coating material for the zirconium alloy cladding pipe on the outer wall of the zirconium alloy cladding pipe. According to the preparation method of the protective coating material for the zirconium alloy cladding pipe, provided by the invention, a very good protective coating is formed on the outer wall of the zirconium alloy cladding pipe, so that the anti-oxidization performance of the zirconium alloy cladding pipe is improved.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of coating materials, and in particular relates to a preparation method of protective coating materials for zirconium alloy cladding pipes. Background technique [0002] Zirconium alloy cladding tube is the sealed shell of nuclear fuel, and its function is to prevent the escape of fission products, prevent fuel from being corroded by coolant, and effectively export heat energy. Zirconium alloy cladding is the first barrier for the fission products of radioactive fuel rods, and its performance will directly affect the safe and reliable operation of fuel rods in the reactor. When the zirconium alloy cladding tube is working in the reactor, it is subjected to intense neutron irradiation, high temperature and high pressure water, and fission product erosion and erosion, the strength increases, the ductility decreases, the corrosion problem is aggravated, distortion occurs, and the surface ...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/12C09D5/46C09D5/03C23C4/11C23C4/134C23C4/129C23C4/02
CPCC09D1/00C09D5/033C09D5/18C09D7/65C23C4/02
Inventor 折生阳
Owner 陕西华秦科技实业股份有限公司
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