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Zirconium oxide/chromium nitride composite membrane on zirconium alloy surface and preparing method and application thereof

A technology of chromium nitride and zirconium alloy, which is applied in the direction of surface reaction electrolytic coating, metal material coating process, ion implantation plating, etc., can solve the problems of complex electrolyte composition and limited improvement of corrosion resistance, and achieve good thermal Stability and corrosion resistance, extended service life, high hardness effect

Active Publication Date: 2018-10-09
TIANJIN NORMAL UNIVERSITY
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  • Description
  • Claims
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Problems solved by technology

There are many holes in the outer layer of the oxide film, the improvement of corrosion resistance is limited, and the composition of the electrolyte is relatively complex. The boron ion impurities introduced in the oxide film increase the neutron absorption cross section of the film layer, so it is not suitable for nuclear grade zirconium. Surface Protection of Alloy Components

Method used

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  • Zirconium oxide/chromium nitride composite membrane on zirconium alloy surface and preparing method and application thereof
  • Zirconium oxide/chromium nitride composite membrane on zirconium alloy surface and preparing method and application thereof
  • Zirconium oxide/chromium nitride composite membrane on zirconium alloy surface and preparing method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Pretreatment: use 400 # , 800 # , 1500 # The surface of the Zr-4 alloy was polished step by step with sandpaper, and the surface oil was removed by ultrasonic cleaning with acetone for 15 min, followed by ultrasonic cleaning with deionized water for 5 min, and then the sample was blown dry with nitrogen.

[0025] (2) Preparation of electrolyte solution for micro-arc oxidation: The electrolyte solution is uniformly mixed with sodium silicate, potassium hydroxide, glycerin and deionized water. Each liter of electrolyte solution contains 5 g of sodium silicate and 1 g of potassium hydroxide. g. Glycerin 1 ml.

[0026] (3) Micro-arc oxidation treatment: Zr-4 is used as the anode, immersed in the prepared electrolyte, and the stainless steel electrode is used as the cathode. The positive working voltage of the micro-arc oxidation power supply was 350 V, and the negative working voltage was 150 V, and the treatment was performed for 1 min.

[0027] (4) Immersion plasma ...

Embodiment 2

[0030] (1) Pretreatment: use 400 # , 800 # , 1500 # The surface of the Zr-4 alloy was polished step by step with sandpaper, and the surface oil was removed by ultrasonic cleaning with acetone for 15 min, followed by ultrasonic cleaning with deionized water for 5 min, and then the sample was blown dry with nitrogen.

[0031] (2) Preparation of electrolyte solution for micro-arc oxidation: The electrolyte solution is uniformly mixed with sodium silicate, potassium hydroxide, glycerin and deionized water. Each liter of electrolyte solution contains 11 g of sodium silicate and 2 g. Glycerin 2 ml.

[0032] (3) Micro-arc oxidation treatment: Zr-4 is used as the anode, immersed in the prepared electrolyte, and the stainless steel electrode is used as the cathode. The positive working voltage of the micro-arc oxidation power supply was 400 V, and the negative working voltage was 50 V, and the treatment was performed for 5 min.

[0033] (4) Immersion plasma deposition treatment: Th...

Embodiment 3

[0036] (1) Pretreatment: use 400 # , 800 # , 1500 # The surface of the Zr-4 alloy was polished step by step with sandpaper, and the surface oil was removed by ultrasonic cleaning with acetone for 15 min, followed by ultrasonic cleaning with deionized water for 5 min, and then the sample was blown dry with nitrogen.

[0037] (2) Preparation of electrolyte solution for micro-arc oxidation: The electrolyte solution is uniformly mixed with sodium silicate, potassium hydroxide, glycerin and deionized water. Each liter of electrolyte solution contains 15 g of sodium silicate and 5 g of potassium hydroxide. g. Glycerin 5 ml.

[0038] (3) Micro-arc oxidation treatment: Zr-4 is used as the anode, immersed in the prepared electrolyte, and the stainless steel electrode is used as the cathode. The positive working voltage of the micro-arc oxidation power supply is 450 V, the negative working voltage is 100 V, and the treatment is 10 min.

[0039] (4) Immersion plasma deposition treatm...

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Abstract

The invention provides a zirconium oxide / chromium nitride composite membrane on a zirconium alloy surface and a preparing method and application thereof. The composite membrane is composed of zirconium oxide and chromium nitride, the thickness of zirconium oxide ranges from 5 to 20 micrometers, and the thickness of chromium nitride ranges from 1 to 4 micrometers. The micro-arc oxidation technologyis adopted to grown a zirconium oxide film on the zirconium alloy surface in an in-situ manner through the micro-arc oxidation technology, the electrolyte is a water solution containing sodium silicate, potassium hydroxide and glycerinum, the immersion type plasma deposition technology is adopted to enable a chromium nitride film to be deposited on the porous outer layer of the zirconium oxide film, the target material is chromium, work gas is nitrogen, and the problems that in the prior art, efficiency of preparing of an anti-corrosion film on the zirconium alloy surface is low, the propertyimproving range is limited, and impurities are easily introduced are solved.

Description

technical field [0001] The invention belongs to the technical field of surface modification of metal materials, and relates to a process method for preparing a zirconia / chromium nitride composite film on the surface of a zirconium alloy by using micro-arc oxidation and immersion plasma deposition technology, which is used to improve the resistance of the zirconium alloy material. corrosion performance. Background technique [0002] Zirconium alloys have low thermal neutron absorption cross section, excellent corrosion resistance, good mechanical and heat transfer properties, and have important applications in the industrial field. Zirconium alloy products are divided into two categories, one is nuclear-grade zirconium, which is mainly used as structural materials for nuclear-powered aircraft carriers, nuclear submarines and nuclear power reactors, and cladding materials for uranium fuel; the other is industrial-grade zirconium, which is mainly used Used in the production of...

Claims

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Application Information

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IPC IPC(8): C23C28/04C25D11/26C23C14/06C23C14/32
CPCC23C14/0021C23C14/0641C23C14/325C23C28/042C25D11/026C25D11/26
Inventor 吴杰李德军董磊邓建华李国政薛文斌
Owner TIANJIN NORMAL UNIVERSITY
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