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Method for surface treatment of metal alloy

A metal alloy and surface treatment technology, which is applied in the direction of surface pretreatment, metal material coating process, and device for coating liquid on the surface, etc., can solve the problems of poor corrosion resistance and unsightly appearance, and achieve excellent corrosion resistance , good decorative effect

Active Publication Date: 2012-10-10
XIAMEN RUNNER IND CORP
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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 surface treatment method for metal alloys in view of the disadvantages of poor corrosion resistance and unattractive appearance of the existing magnesium alloy and aluminum alloy surface treatment methods.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment illustrates the treatment method of magnesium alloy surface provided by the present invention

[0027] (1) Pretreatment

[0028] Place the magnesium alloy gold AZ91D (Xiamen Zhicheng Electronics Co., Ltd.) with a size of 1000mm×500mm×2mm on the polishing machine to vibrate and grind the surface of the magnesium alloy (the vibration frequency is 1000Hz) for 15 minutes, and then use the cloth wheel (80#) to grind the magnesium alloy The surface is finely polished by hand for 1 minute to make the surface of the magnesium alloy achieve a mirror effect. Then use acetone to degrease manually, and use atmospheric pressure plasma to activate for 5 minutes.

[0029] (2) Spray electrostatic powder coating

[0030] The magnesium alloy sample was dried at a temperature of 50°C for 20 minutes and then subjected to electrostatic powder spraying. A layer of 5 μm thick powder coating was electrostatically sprayed and cured in an oven at a curing temperature of 200°C a...

Embodiment 2

[0046] This embodiment illustrates the treatment method of magnesium alloy surface provided by the present invention

[0047] (1) Pretreatment

[0048] Place the magnesium alloy gold AZ91D (Xiamen Zhicheng Electronics Co., Ltd.) with a size of 2000mm×500mm×2mm on the polishing machine, use green polishing paste on the surface of the aluminum alloy for manual rough polishing for 3 minutes, and then use a cloth wheel (80#) to polish the surface of the magnesium alloy. Manual fine polishing for 2 minutes to make the surface of the magnesium alloy achieve a mirror effect. Then use acetone to degrease manually, and use atmospheric pressure plasma to activate for 10 minutes.

[0049] (2) Spray electrostatic powder coating

[0050] The magnesium alloy sample was dried at 50°C for 20 minutes and then electrostatic powder sprayed. A layer of 15 μm thick powder coating was electrostatically sprayed and cured in an oven at a curing temperature of 140°C and a curing time of 30 minutes. ...

Embodiment 3

[0056] This embodiment illustrates the treatment method of aluminum alloy surface provided by the present invention

[0057] (1) Pretreatment

[0058] Place the aluminum alloy gold ADC12 with a size of 200mm×500mm×2mm on the polishing machine, use green polishing paste on the surface of the aluminum alloy to perform rough polishing by hand for 3 minutes, and then use a cloth wheel (80#) to perform fine polishing on the surface of the aluminum alloy by hand for 1 minute, so that the aluminum The surface of the alloy achieves a mirror effect. Then use acetone to degrease manually, and use atmospheric pressure plasma to activate for 10 minutes.

[0059] (2) Spray electrostatic powder coating

[0060] The aluminum alloy sample was dried at 50°C for 10 minutes and then electrostatically sprayed with powder. A layer of 15 μm thick powder coating was electrostatically sprayed and cured in an oven at a curing temperature of 140°C and a curing time of 30 minutes.

[0061] (3) Interm...

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Abstract

The invention relates to a method for surface treatment of a metal alloy. The method comprises the following steps of: performing oil removal and normal pressure plasma surface activation on the surface of the metal alloy, wherein the metal alloy is magnesium alloy or aluminum alloy; spraying a layer of powder coating on the surface of the metal alloy after pretreatment; after performing electrostatic powder coating on the surface of the metal alloy, putting the metal alloy into a physical vapor deposition (PVD) physical deposition furnace to perform plasma glow activation, and then physically depositing a layer of metallic copper film by adopting PVD; and after physically depositing the layer of the metallic copper film by adopting the PVD, performing electro-coppering, electro-nickelling and electro-chromeplating in turn on the metal alloy to form three metal coatings. According to the method, the metal alloy has excellent corrosion resistance and good decorative effect, and simultaneously meets the requirements on high performance and highly-attractive appearance of magnesium alloy or aluminum alloy products in the industries of bathroom, household electrical appliances, automobiles, electron and the like. After the surface treatment, the CASS corrosion resisting time of the magnesium alloy and the aluminum alloy is 24 hours.

Description

technical field [0001] The invention relates to a surface treatment method of a metal alloy. Background technique [0002] There are many kinds of metal alloys. Among them, magnesium alloy is an alloy composed of magnesium and other elements. Its characteristics are: low density (about 1.8g / cm 3 Magnesium alloy), high specific strength, large elastic modulus, good shock absorption, greater impact load capacity than aluminum alloy, and good corrosion resistance to organic matter and alkali. The main alloying elements are aluminum, zinc, manganese, cerium, thorium and a small amount of zirconium or cadmium. Magnesium-aluminum alloys are currently the most widely used, followed by magnesium-manganese alloys and magnesium-zinc-zirconium alloys. Mainly used in aviation, aerospace, transportation, chemical industry, rocket and other industrial sectors. Magnesium is the lightest metal among practical metals. The specific gravity of magnesium is about 2 / 3 of that of aluminum and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C28/02C23C14/22C23C14/02C25D5/14B05D1/06B05D3/02
Inventor 余水吴子豹柯学标乔永亮李明仁
Owner XIAMEN RUNNER IND CORP
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