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Metal base subjected to surface treatment, metal-resin compound, preparation methods and uses of metal-resin compound and metal base subjected to surface treatment, electronic product housing and preparation method of electronic product housing

A metal substrate and surface treatment technology, applied in the direction of metal layered products, synthetic resin layered products, chemical instruments and methods, etc., can solve the problem of low bonding strength between the metal substrate and the resin layer, and achieve high bonding strength, The effect of high structural stability

Inactive Publication Date: 2016-04-27
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the technical problem that the bonding strength between the metal substrate and the resin layer is not high in the existing metal-resin composite

Method used

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  • Metal base subjected to surface treatment, metal-resin compound, preparation methods and uses of metal-resin compound and metal base subjected to surface treatment, electronic product housing and preparation method of electronic product housing
  • Metal base subjected to surface treatment, metal-resin compound, preparation methods and uses of metal-resin compound and metal base subjected to surface treatment, electronic product housing and preparation method of electronic product housing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] (1) A commercially available 5052 aluminum alloy plate with a thickness of 1 mm was cut into rectangular pieces of 15 mm×80 mm. Put the rectangular piece into the polishing machine for polishing. Then, it was washed with absolute ethanol, then immersed in an aqueous solution of sodium hydroxide with a concentration of 2% by weight, taken out after 2 minutes, and rinsed with deionized water to obtain a pretreated aluminum alloy sheet.

[0111] (2) putting the aluminum alloy sheet that step (1) obtains as anode into a micro-arc oxidation tank with a concentration of 20% by weight sodium silicate aqueous solution as an electrolyte, and using a graphite carbon plate as a cathode, under a voltage of 100V , electrolyzed at 20°C for 30 minutes for micro-arc oxidation. The aluminum alloy sheet subjected to micro-arc oxidation is taken out and dried to obtain an aluminum alloy sheet with a micro-arc oxidation film layer on the surface. The cross-section of the aluminum alloy s...

Embodiment 2

[0117] The same method as in Example 1 is used to carry out surface treatment on the aluminum alloy sheet and prepare a metal-resin composite body. The difference is that in step (2), the electrolyte used is a sodium phosphate aqueous solution with a concentration of 20% by weight, and the voltage is 80V, the temperature of the electrolyte is 20°C.

[0118] Observe the cross-section of the aluminum alloy sheet obtained in step (2) with a microscope, and determine that the average thickness of the micro-arc oxidation film layer is 15 μm. Adopt the cross-section of the aluminum alloy plate that microscope observation step (3) obtains, find: in the micro-arc oxidation film layer, be distributed with the corrosion hole that aperture is in the scope of 50-200nm, the depth of this corrosion hole and the thickness of micro-arc oxidation film layer The ratio is in the range of 0.3-1:1, and the ratio of the depth of the corrosion hole to the thickness of the micro-arc oxidation film la...

Embodiment 3

[0121] The aluminum alloy sheet was surface treated and a metal-resin composite was prepared using the same method as in Example 1, except that in step (3), the etching solution was an aqueous solution of NaOH (pH=13).

[0122] Adopt the cross-section of the aluminum alloy plate that microscope observation step (3) obtains, find: in the micro-arc oxidation film layer, be distributed with the corrosion hole that aperture is in the range of 10-200nm, the depth of this corrosion hole and the thickness of micro-arc oxidation film layer The ratio is in the range of 0.1-1:1, and the ratio of the depth of the corrosion hole to the thickness of the micro-arc oxidation film layer is 1:1 in more than 50% of the corrosion holes.

[0123] The average shear strengths of the prepared metal-resin composites are listed in Table 1.

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Abstract

The invention discloses a metal base subjected to surface treatment and a preparation method thereof. The metal is aluminum or an aluminum alloy. The metal base comprises a metal base and a micro-arc oxidation film layer adhering to at least one part of the surface of the metal base. The surface of the micro-arc oxidation film layer is provided with first etch pits. The invention also provides a metal-resin compound. The metal is aluminum or an aluminum alloy. The metal-resin compound comprises the metal base subjected to surface treatment and a resin layer coating at least one part of the surface of the metal base, wherein a part of resin in the resin layer extends downward and fills the etch pits of the metal base. In the metal-resin compound, bonding strength between the resin and the metal base is high and the resin layer does not easily fall from the metal base surface so that the metal-resin compound has high structural stability, satisfies high structural stability requirements of a use field and can be used as an electronic product housing.

Description

technical field [0001] The present invention relates to a surface-treated metal substrate and its preparation method and application. The present invention also relates to a metal-resin composite and its preparation method and application. The present invention further relates to an electronic product shell and its preparation method . Background technique [0002] In the field of parts manufacturing for automobiles, home appliances, industrial machines, etc., aluminum or aluminum alloy and resin integrated molding technology is required. [0003] At present, the commonly used method of combining aluminum or aluminum alloy and resin is gluing technology. This method combines aluminum or aluminum alloys with formed resins through chemical adhesives to obtain composites. However, in the composite body obtained by this method, the binding force between aluminum or aluminum alloy and resin is poor, and the adhesive bonding layer is not resistant to acid and alkali, which affec...

Claims

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Application Information

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IPC IPC(8): B32B15/08B32B27/06B29C45/14
CPCB29C45/14B32B15/08B32B37/15C25D11/04
Inventor 孙剑吴彦琴夏艳侠陈梁
Owner BYD CO LTD
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