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Process for plating copper on surface of magnesium alloy shell

A technology of magnesium alloy and electroplating copper, which is applied in the field of electroplating to achieve the effects of low porosity, good bonding force and convenient maintenance

Inactive Publication Date: 2014-07-02
无锡市锡山区鹅湖镇荡口青荡金属制品厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The uniformity, flatness and bonding force with the metal substrate of the electroplating copper coating in the above-mentioned processes are not very ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A process for electroplating copper on the surface of a magnesium alloy shell, said process comprising the steps of:

[0019] 1) Cleaning: Under the condition of 65-75 ℃, soak the magnesium alloy casting in the alkali washing solution for 8 minutes. The composition of the alkali solution is sodium hydroxide 74g / L, sodium phosphate 8g / L, the balance is water, and then wash with water; Under the condition of 35-45°C, soak the magnesium alloy casting in tartaric acid for 60s, and then wash it with water;

[0020] 2) Activation: Activate the magnesium alloy castings in the activator for 5-15 minutes at room temperature, and then wash with water; the activation solution consists of citric acid 165g / L, NaF210g / L, and the balance is water;

[0021] 3) Zinc dipping alloy: the composition of the dipping zinc solution is: ZnSO 4 ·7H 2 O32g / L, Na 4 P 2 o 7 10H 2 O170g / L, NaF10g / L, KF8g / L, NaF 2 CO 3 8g / L, NiSO 4 3g / L, phosphoric acid 15g / L, and water as the balance; at 75...

Embodiment 2

[0024] A process for electroplating copper on the surface of a magnesium alloy shell, said process comprising the steps of:

[0025] 1) Cleaning: Under the condition of 65-75°C, soak the magnesium alloy casting in the alkaline washing solution for 10 minutes. The alkaline solution is composed of sodium hydroxide 76g / L, sodium phosphate 6g / L, and the balance is water, and then wash with water; Under the condition of 35-45°C, soak the magnesium alloy casting in tartaric acid for 60s, and then wash it with water;

[0026] 2) Activation: Activate the magnesium alloy castings in the activator for 15 minutes at room temperature, and then wash with water; the activation solution consists of citric acid 175g / L, NaF 200g / L, and the balance is water;

[0027] 3) Zinc dipping alloy: the composition of the dipping zinc solution is: ZnSO 4 ·7H 2 O36g / L, Na 4 P 2 o 7 10H 2 O160g / L, NaF12g / L, KF6g / L, NaF 2 CO 3 12g / L, NiSO 4 2g / L, phosphoric acid 18g / L, and water as the balance; at ...

Embodiment 3

[0030] A process for electroplating copper on the surface of a magnesium alloy shell, said process comprising the steps of:

[0031] 1) Cleaning: Under the condition of 65-75 ℃, soak the magnesium alloy casting in the alkali washing solution for 9 minutes, the composition of the alkali solution is sodium hydroxide 75g / L, sodium phosphate 7g / L, the balance is water, and then wash with water; Under the condition of 35-45°C, soak the magnesium alloy casting in tartaric acid for 50s, and then wash it with water;

[0032] 2) Activation: Activate the magnesium alloy castings in the activator for 10 minutes at room temperature, and then wash with water; the activation solution consists of citric acid 170g / L, NaF205g / L, and the balance is water;

[0033] 3) Zinc dipping alloy: the composition of the dipping zinc solution is: ZnSO 4 ·7H 2 O34g / L, Na 4 P 2 o 7 10H 2 O165g / L, NaF11g / L, KF7g / L, NaF 2 CO 3 10g / L, NiSO 4 2.5g / L, phosphoric acid 17g / L, the balance is water; under th...

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PUM

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Abstract

The invention discloses a process for plating copper on the surface of a magnesium alloy shell. The process comprises the following steps: (1) cleaning: cleaning by using alkali, water and acid in sequence; (2) activating: activating in an activation solution for 5-15 minutes; (3) performing zinc alloy soaking: soaking a magnesium alloy casting in zinc alloy immersion liquid at the temperature of 75-85 DEG C for 10-15 minutes; (4) plating copper: plating under the condition that the pH is 8-8.5, the current density is 3-3.5 A / dm<2>, and the temperature is 35-45 DEG C. By adjusting the zinc immersion liquid and plating solution components for plating copper, the defects in the prior art are overcome, and the bonding force between a plating and a substrate is enhanced.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a process for electroplating copper on the surface of a magnesium alloy shell. Background technique [0002] The heat dissipation of magnesium alloy is not only higher than that of plastic, but also better than that of aluminum alloy. The thermal diffusivity of magnesium alloy is 3.79×10 -5 m 2 Ps, the thermal diffusivity of aluminum alloy is 3.64×10 -5 m 2 Ps, while the thermal diffusivity of engineering plastics is 0. Magnesium alloys heat and dissipate heat faster than aluminum alloys, and engineering plastics are even more incomparable. Magnesium alloy also has a high performance of shielding electromagnetic interference, which is suitable for the casing of electronic equipment, especially for the casing of laptop computers, mobile phones, PDAs, digital cameras and other products. [0003] In short, magnesium alloy has the functions of light weight, durability, sh...

Claims

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Application Information

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IPC IPC(8): C25D3/38C25D5/42
Inventor 钱永清
Owner 无锡市锡山区鹅湖镇荡口青荡金属制品厂
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