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 metal and resin, and achieve high bonding strength and high structural stability sexual effect

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 metal and resin 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

[0106] (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 soaked 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.

[0107] (2) the aluminum alloy sheet that step (1) obtains is put into the H that is 20% by weight with concentration as anode 2 SO 4 In an anodic oxidation tank in which an aqueous solution is used as an electrolyte, a graphitic carbon plate is used as a cathode, and electrolyzed at 20° C. for 10 minutes at a voltage of 15 V. The anodized aluminum alloy sheet was taken out, soaked in water for 1 minute, and then dried to obtain an aluminum alloy sheet with an anodized film on the surface. Observing the aluminum alloy sheet along the thickn...

Embodiment 2

[0146] (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 wash it with absolute ethanol, then soak it in a sodium hydroxide aqueous solution with a concentration of 2% by weight, take it out after 2 minutes and rinse it with deionized water to obtain a pretreated aluminum alloy sheet;

[0147] (2) putting the aluminum alloy sheet that step (1) obtains as an anode into an anodic oxidation tank with a concentration of 20% by weight sulfuric acid as an electrolyte, and using a graphite carbon plate as a cathode, under a voltage of 20V, at 20°C Electrolyze for 12 minutes. The anodized aluminum alloy sheet was taken out, soaked in water for 1 minute, and then dried to obtain an aluminum alloy sheet with an anodized film on the surface. The cross-section of the aluminum alloy sheet was observed with a microscope to determine that the...

Embodiment 3

[0153] (1) The same method as in Example 2 is used to cut and pre-treat the aluminum alloy.

[0154] (2) The aluminum alloy sheet obtained in step (1) of embodiment 3 was anodized by the same method as step (2) of embodiment 2.

[0155] (3) The aluminum alloy sheet obtained in the step (2) of the embodiment 3 is subjected to the first etching by the same method as the step (3) of the embodiment 2.

[0156] (4) The aluminum alloy obtained in the step (3) of the embodiment 3 is subjected to the second etching by the same method as the step (4) of the embodiment 2. The difference is that the etching solution also contains NaCl, and the molar ratio of NaCl to HCl is 0.5 :1.

[0157] Adopt the cross-section of the aluminum alloy that step (4) obtains to adopt microscope observation, find: distribute in the anodized film layer and be distributed with the first corroded hole in the range of 120-200nm, the depth of the first corroded hole and described anodized film layer The ratio ...

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Abstract

The invention provides a metal base subjected to surface treatment and a preparation method thereof. The preparation method comprises carrying out anodic oxidation on a metal base to obtain an anodic oxide film on the surface of the metal base and etching the metal base subjected to anodic oxidation orderly through an alkaline etching solution and an acidic etching solution so that etch pits are formed. The invention also provides a metal-resin compound and a preparation method thereof. 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 invention relates to a surface-treated metal base material and a preparation method thereof. The invention also relates to a metal-resin composite body and a preparation method and application thereof. The invention further relates to an electronic product casing and a preparation method thereof. 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 the aluminum or aluminum alloy matrix and the resin is poor, and the adhesive bonding layer is not resistant to acid and alkali, which affe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/08B32B27/06B29C45/14
CPCB29C45/14B32B15/08B32B37/15C25D11/04
Inventor 孙剑吴彦琴张云侠宋文广陈梁
Owner BYD CO LTD
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