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Copper plating method for aluminum pieces

A technology of aluminum parts and copper plating, applied in the field of copper plating of aluminum parts, can solve problems such as failure to return to the original shape, poor metal fatigue, and easy deformation

Inactive Publication Date: 2015-12-23
ANHUI JIANGWEI PRECISION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Metal aluminum has good ductility, excellent electrical conductivity, thermal conductivity and corrosion resistance, so it is widely used as a material for various workpieces, but aluminum parts also have some shortcomings, such as poor metal fatigue. The amplitude is large, it is easy to deform and cannot return to its original shape, usually people will plate copper on the aluminum parts to solve this problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) At 30°C, the aluminum parts taken out after soaking in trichlorethylene were activated with hydrochloric acid for 1.5 minutes to obtain activated aluminum parts;

[0031] (2) Put the activated aluminum parts in a place containing zinc sulfate, sodium fluoride, potassium pyrophosphate, sodium gluconate, potassium tartrate, sodium carbonate, glycerin, tin methanesulfonate and water (the weight ratio is 15:12:70:60 : 18: 11: 4: 250) in the galvanizing solution at 30°C for 25 minutes to obtain galvanized aluminum parts;

[0032] (3) At 30°C, place the galvanized aluminum parts in a solution containing copper chloride, anthraquinone, catechol, potassium sulfate, malic acid, 2,2-bipyridyl, diaminoethane tetraacetate, ethylene diacetate Aldehyde, sodium sulfite and water (weight ratio 100:35:15:8:12:5:13:14:4:180) copper plating solution at 0.2A / dm 2 Copper plating treatment was carried out for 1.5h under the energizing current to obtain copper-plated aluminum part A1.

Embodiment 2

[0034] (1) At 25°C, the aluminum parts taken out after soaking in carbon tetrachloride were activated with sulfuric acid for 1 min to obtain activated aluminum parts;

[0035] (2) Put the activated aluminum parts in a place containing zinc sulfate, sodium fluoride, potassium pyrophosphate, sodium gluconate, potassium tartrate, sodium carbonate, glycerin, tin methanesulfonate and water (the weight ratio is 12:7:60:55 : 15:8:2:200) in the galvanizing solution at 25°C for 40 minutes to obtain galvanized aluminum parts;

[0036] (3) At 25°C, place zinc-dipped aluminum parts in a solution containing copper sulfate pentahydrate, anthraquinone, catechol, potassium sulfate, malic acid, 2,2-bipyridine, diaminoethane tetraacetate, ethyl Dialdehyde, sodium sulfite and water (weight ratio 100:30:12:5:10:4:11:10:2:150) copper plating solution at 0.1A / dm 2 Copper-plating treatment was carried out for 2.5 hours under the energizing current to obtain copper-plated aluminum part A2.

Embodiment 3

[0038] (1) At 35°C, the aluminum parts taken out after soaking in carbon tetrachloride were activated with nitric acid for 2 minutes to obtain activated aluminum parts;

[0039] (2) Put the activated aluminum parts in a place containing zinc sulfate, sodium fluoride, potassium pyrophosphate, sodium gluconate, potassium tartrate, sodium carbonate, glycerin, tin methanesulfonate and water (the weight ratio is 12:7:60:55 : 15:8:2:200) in the galvanizing solution at 35°C for 10 minutes to obtain galvanized aluminum parts;

[0040] (3) At 35°C, place the galvanized aluminum parts in a solution containing copper nitrate, anthraquinone, catechol, potassium sulfate, malic acid, 2,2-bipyridine, diaminoethane tetraacetate, glyoxal , sodium sulfite and water (weight ratio 100:40:18:10:14:8:14:16:6:300) copper plating solution at 0.4A / dm 2 Copper-plating treatment was carried out for 0.5h under the energizing current to obtain copper-plated aluminum part A3.

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PUM

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Abstract

The invention discloses a copper plating method for aluminum pieces. The copper plating method for the aluminum pieces includes the steps that (1) aluminum pieces obtained after oil removing operation is activated with acid to prepare activated aluminum pieces; (2) the activated aluminum pieces are arranged in zinc soaking liquid to be soaked so as to prepare zinc soaked aluminum pieces; and (3) the zinc soaked aluminum pieces are arranged in copper plating liquid for copper plating so as to prepare the copper plated aluminum pieces, wherein the copper plating liquid contains copper salt, anthraquinone, catechol, potassium sulphate, malic acid, 2,2-dipyridyl, tetraacetic acid diaminoethane, glyoxal, sodium sulfite and water. By means of the method, a copper plating layer obtained through copper plating is high in adhesive force, large in hardness, smooth and free of particles.

Description

technical field [0001] The invention relates to the field of electroplating copper, in particular to a copper plating method for aluminum parts. Background technique [0002] Metal aluminum has good ductility, excellent electrical conductivity, thermal conductivity and corrosion resistance, so it is widely used as a material for various workpieces, but aluminum parts also have some shortcomings, such as poor metal fatigue. The amplitude is large, it is easy to deform and cannot return to its original shape. Usually, people will plate copper on aluminum parts to solve this problem. [0003] At present, the commonly used copper plating method is to use the copper plating solution containing cyanide to directly electroplate the aluminum parts. The copper plating layer obtained by this electroplating method has weak adhesion, low hardness and small particles in the copper plating layer. smooth. Contents of the invention [0004] The object of the present invention is to prov...

Claims

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Application Information

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IPC IPC(8): C25D3/38C25D5/44
Inventor 鲍启兵沈福建洪术茂肖亮
Owner ANHUI JIANGWEI PRECISION IND
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