A kind of magnesium alloy surface zirconia base film and preparation method

A surface oxidation and magnesium alloy technology, applied in metal material coating process, coating, liquid chemical plating and other directions, can solve the problems of complex zirconia film layer equipment, weak bonding of the substrate, and thermal influence of the substrate. Special equipment, excellent corrosion resistance, and low production cost

Active Publication Date: 2022-08-02
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a zirconia film on the surface of a magnesium alloy and to solve the problems of complex equipment for preparing a zirconia film layer on the surface of a magnesium alloy, high cost, thermal influence on the substrate, and poor bonding of the substrate. method

Method used

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  • A kind of magnesium alloy surface zirconia base film and preparation method
  • A kind of magnesium alloy surface zirconia base film and preparation method
  • A kind of magnesium alloy surface zirconia base film and preparation method

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Experimental program
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Effect test

Embodiment 1

[0023] (1) Magnesium alloy pretreatment: sand the magnesium alloy block with sandpaper until the surface is bright (use 200 #, 400 #, 800 #, 1000 # sandpaper in turn until the surface is bright, no obvious scratches), ultrasonic cleaning with ethanol for 10 min, dry in cold air, set aside.

[0024] (2) Configuration of hydrothermal reaction medium: ZrO (NO 3 ) 2 Anhydrous ethanol solution and pH 8 sodium hydroxide aqueous solution, ZrO (NO 3 ) 2 The volume ratio of absolute ethanol solution to NaOH aqueous solution was 8:1.

[0025] (3) Membrane layer preparation: transfer the absolute ethanol solution of zirconium oxynitrate to the inner lining of the reactor, and transfer the aqueous solution of sodium hydroxide to a small beaker. A small beaker was placed inside the reactor liner. The magnesium block was placed on the reaction support, and the reaction kettle was placed in a blast drying oven and kept at 160 °C for 8 h. After cooling, the magnesium alloy block was tak...

Embodiment 2

[0028] (1) Magnesium alloy pretreatment: The magnesium alloy block is polished with sandpaper until the surface is bright, ultrasonically cleaned with ethanol for 10 min, and dried with cold air for use.

[0029] (2) Configuration of hydrothermal reaction medium: ZrO (NO 3 ) 2 Anhydrous ethanol solution and pH 10 sodium hydroxide aqueous solution, ZrO(NO 3 ) 2 The volume ratio of absolute ethanol solution to NaOH aqueous solution was 3:1.

[0030] (3) Membrane layer preparation: transfer the absolute ethanol solution of zirconium oxynitrate to the inner lining of the reactor, and transfer the aqueous solution of sodium hydroxide to a small beaker. A small beaker was placed inside the reactor liner. The magnesium block was placed on the reaction support, and the reaction kettle was placed in a blast drying oven for 13 h at 140 °C. After cooling, the magnesium alloy block was taken out, rinsed with deionized water, and dried at 60 °C for 6 h.

[0031] The hardness of the p...

Embodiment 3

[0033] (1) Magnesium alloy pretreatment: The magnesium alloy sheet is polished with sandpaper until the surface is bright, ultrasonically cleaned with ethanol for 10 min, and dried in cold air for use.

[0034] (2) Configuration of hydrothermal reaction medium: ZrO(NO) with 0.02 mol / L 3 ) 2 Anhydrous ethanol solution and pH 13 sodium hydroxide aqueous solution, ZrO (NO 3 ) 2 The volume ratio of absolute ethanol solution to NaOH aqueous solution was 4:1.

[0035] (3) Membrane layer preparation: transfer the absolute ethanol solution of zirconium oxynitrate to the inner lining of the reactor, and transfer the aqueous solution of sodium hydroxide to a small beaker. A small beaker was placed inside the reactor liner. The magnesium block was placed on the reaction support, and the reaction kettle was placed in a blast drying oven for 8 h at 140 °C. After cooling, the magnesium alloy block was taken out, rinsed with deionized water, and dried at 60 °C for 6 h.

[0036] The har...

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Abstract

The invention relates to a zirconia base film layer on the surface of a magnesium alloy and a preparation method, and belongs to the technical field of magnesium alloy materials. The invention prepares the zirconia-based coating on the surface of the magnesium alloy by the gas-phase hydrothermal method. Through the gas phase hydrothermal technology, the direct contact between the zirconium source and the liquid water is avoided, the hydrolysis rate of the zirconium salt is effectively controlled, and the film layer prepared on the surface of the magnesium alloy is denser and has better corrosion resistance. The preparation method has the advantages of simple operation, no need for special equipment, more environmentally friendly reagents, low preparation cost, and the like. This method provides a new way for the preparation of ceramic films on magnesium alloy surfaces.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy materials, and particularly relates to a zirconia base film layer on the surface of a magnesium alloy and a preparation method. Background technique [0002] Magnesium alloy is currently the lightest structural material with a density of about 1.8g / cm 3 , about 2 / 3 of aluminum, 1 / 4 of steel, and 1 / 3 of titanium. In addition, its specific strength and specific stiffness surpass other metals, making it a highly favored "super-metal-philic". Magnesium alloys also have excellent machining properties, good electromagnetic shielding properties, shock absorption, high thermal conductivity and hydrogen storage properties, so they are known as "green engineering materials in the 21st century". It has a wide range of application backgrounds in aerospace, transportation and 3C fields. [0003] However, magnesium alloys have high chemical activity, poor corrosion resistance, and low hardness, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/12C23C22/60C23C22/68
CPCC23C18/1216C23C22/60C23C22/68
Inventor 张跃忠刘宝胜杜婷
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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