Selective plating method for aluminum material

A local electroplating and aluminum technology, which is applied in the direction of anodizing, coating liquid on the surface, pretreatment of the surface, etc., can solve the problems of high cost, excessive consumption of electroplating sources, and imprecise shielding or protection

Active Publication Date: 2012-05-16
SHENZHEN GRENTECH RF COMM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The embodiment of the present invention provides a partial electroplating method for aluminum materials to solve the pr

Method used

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  • Selective plating method for aluminum material
  • Selective plating method for aluminum material
  • Selective plating method for aluminum material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]The surface of the aluminum material in this embodiment 1 is the surface of the radio frequency passive module made of aluminum alloy, and the local electroplating method on the surface of the radio frequency passive module includes the following specific procedures:

[0044] (1) The surface of the RF passive module is firstly processed by polishing and other machining, and then degreasing, cleaning and drying;

[0045] (2) get the trivalent chromate solution that mass concentration is 10%, wherein, the content of trivalent chromium in the trivalent chromate solution is represented by Cr 2 o 3 The measured content is about 2g / L, and then, at room temperature, treat the surface of the RF passive module with a trivalent chromate solution for about 3 minutes to form a conductive oxide layer in the non-plating area;

[0046] (3) At room temperature, spray it on the non-plating area according to the above coating formula to form a coating of about 40 microns, and let it dry ...

Embodiment 2

[0058] The surface of the aluminum material in this embodiment 2 is the surface of the radio frequency passive module made of aluminum alloy, and the local electroplating method on the surface of the radio frequency passive module includes the following specific procedures:

[0059] (1) with embodiment 1;

[0060] (2) get the trivalent chromate solution that mass concentration is 12%, wherein, the content of trivalent chromium in the trivalent chromate solution is represented by Cr 2 o 3 The measured content is about 2.2g / L, and then, at room temperature, treat the surface of the RF passive module with a trivalent chromate solution for about 2.5 minutes to form a conductive oxide layer in the non-plating area;

[0061] (3) At room temperature, spray it on the non-plating area according to the above coating formula to form a coating of about 50 microns, and let it dry naturally at room temperature for 8 minutes;

[0062] (4) At a temperature of 25°C, take a zinc dipping solut...

Embodiment 3

[0073] The surface of the aluminum material in this embodiment 3 is the surface of the radio frequency passive module made of aluminum alloy, and the local electroplating method on the surface of the radio frequency passive module includes the following specific procedures:

[0074] (1) with embodiment 1;

[0075] (2) get the trivalent chromate solution that mass concentration is 13%, wherein, the content of trivalent chromium in the trivalent chromate solution is represented by Cr 2 o 3 The measured content is about 2.5g / L, and then, at room temperature, treat the surface of the RF passive module with a trivalent chromate solution for about 2 minutes to form a conductive oxide layer in the non-plating area;

[0076] (3) At room temperature, spray it on the non-plating area according to the above coating formula to form a coating of about 60 microns, and let it dry naturally at room temperature for 10 minutes;

[0077] (4) At a temperature of 25°C, take a zinc dipping soluti...

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Abstract

The invention provides a selective plating method for an aluminum material, comprising the following steps of: pre-treating the surface of the aluminum material, wherein the surface of the aluminum material comprises a non-plated region and a region to be plated; carrying out conductive oxidation treatment on the non-plated region on the pre-treated surface of the aluminum material so as to form a conductive oxidation layer on the non-plated region; spraying the non-plated region of the aluminum material which is subjected to the conductive oxidation treatment, and drying after a protective coating is formed; plating the dried aluminum material so as to form a plated layer on the region to be plated; and dissolving and removing the protective coating with isoamyl acetate. According to the selective plating method for the aluminum material, the non-plated region of the aluminum material is protected and shielded very strictly by means of spraying the coating; and the coating is dissolved and removed with the isoamyl acetate after the region to be plated is plated so that the non-plated region is not polluted or damaged, and a plating source is omitted. Furthermore, the sprayed coating can be used for effectively protecting the surface which is in an irregular shape or is uneven as well, and the appearance quality of the surface is not influenced.

Description

technical field [0001] The invention relates to a surface treatment method for aluminum materials, in particular to a partial electroplating method for aluminum materials. Background technique [0002] At present, aluminum alloy substrates are widely used, including daily necessities, industrial equipment, precision instruments, automobile wheels, electronic communication products and so on. For example, aluminum alloy substrates can be used in radio frequency passive products in communication equipment. The surface of the aluminum alloy base material of this kind of radio frequency passive product usually needs to be protected. It is very large, which will lead to the continuous loss of precious metals. Taking effective measures to save the amount of precious metals is an urgent problem that we need to solve. At present, the thinning of the plating layer and the use of substitutes for passive modules are being adopted by many equipment suppliers, and some indoor modules a...

Claims

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Application Information

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IPC IPC(8): C25D5/02C25D5/30C25D11/04B05D1/32B05D3/10
Inventor 王小青
Owner SHENZHEN GRENTECH RF COMM LTD
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