Process for copper coating on surface of magnesium and magnesium alloy

A surface chemical and electroless copper plating technology, which is applied in the field of metal surface treatment, can solve problems such as difficult implementation, and achieve the effects of prolonging service life, low cost, and good sterilization and disinfection

Inactive Publication Date: 2006-06-28
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, direct electroless copper plating on the surfac

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 2. Pickling and alkaline cleaning: Soak magnesium or magnesium alloy in pickling solution for 3 minutes to remove oxides and impurities on the surface until the surface of the magnesium alloy reveals a metallic luster. Take it out, quickly and thoroughly wash the surface of magnesium or magnesium alloy with clean water. Then put the magnesium or magnesium alloy into the alkali washing solution and soak at room temperature, take it out after 3 minutes, clean it with clean water, and put it in a drying oven for drying.

[0036] The pickling solution is dilute nitric acid solution, and its concentration can be:

[0037] 50ml / l, 150ml / l, 100ml / l, 60ml / l or 120ml / l dilute nitric acid solution,

[0038] The alkali washing solution is sodium hydroxide solution, or potassium hydroxide solution, or sodium carbonate solution, or potassium carbonate solution, or sodium phosphate solution, or ammonia solution, or more than one combination thereof, but it must be ensured tha...

Embodiment 2

[0052] 2. Pickling and alkaline cleaning: Soak magnesium or magnesium alloy in pickling solution for 1 minute to remove oxides and impurities on the surface until the surface of the magnesium alloy reveals a metallic luster. Take it out, quickly and thoroughly wash the surface of magnesium or magnesium alloy with clean water. Then put the magnesium or magnesium alloy into the alkali washing solution and soak at room temperature, take it out after 0.5min, clean it with clean water, and put it in a drying oven for drying.

[0053] The pickling solution is a mixed solution of acetic acid and sodium nitrate, and its ratio can be:

[0054] Acetic acid 40ml / l, sodium nitrate 5g / l, the balance is water;

[0055] Acetic acid 60ml / l, sodium nitrate 1g / l, the balance is water;

[0056] Acetic acid 10ml / l, sodium nitrate 10g / l, the balance is water;

[0057] Acetic acid 20ml / l, sodium nitrate 3g / l, the balance is water;

[0058] Acetic acid 50ml / l, sodium nitrate 7g / l, the bal...

Embodiment 3

[0073] 2. Pickling and alkaline cleaning: Soak magnesium or magnesium alloy in pickling solution for 4 minutes to remove oxides and impurities on the surface until the surface of the magnesium alloy reveals a metallic luster. Take it out, quickly and thoroughly wash the surface of magnesium or magnesium alloy with clean water. Then put the magnesium or magnesium alloy into the alkali washing solution and soak at room temperature, take it out after 5 minutes, clean it with clean water, and put it in a drying oven for drying.

[0074] The pickling solution is a mixed solution of chromic anhydride and sodium nitrate, and its ratio can be:

[0075] Chromic anhydride 70g / l, sodium nitrate 8g / l, the balance is water.

[0076] Chromic anhydride 40g / l, sodium nitrate 15g / l, the balance is water.

[0077] Chromic anhydride 120g / l, sodium nitrate 1g / l, the balance is water.

[0078] Chromic anhydride 40g / l, sodium nitrate 6g / l, the balance is water.

[0079] Chromic anhydride...

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PUM

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Abstract

The invention relates to magnesium and its alloy surface chemical copper plating method. It combines film coating with chemical copper plating to do composite protection. The film coating is after de-oiling, acid and alkaline cleaning. The film coating agent includes organic silicon heat resistant paint, organic titanium heat resistant paint WT61-1 and WT61-2, water glass base paint JN-801 silicate inorganic coating, silicone resin SF-7406 three proofing varnish, silane coupling agent KH550. After film coating it is processed sensitization, activation, and chemical copper plating. The formed chemical copper plating layer is uniform and has the appearance of metallic copper. The coating film has good ware, acid, and alkaline resistance. The cost and use level of copper sulfate are much less than chemical nickel plating. Thus the cost of invention is low; and its operation is simple; and suitable for industrialization production.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, in particular to a method for electroless copper plating on the surface of magnesium and magnesium alloys. Background technique [0002] As metal structural materials, magnesium and its alloys have many unique advantages; low elastic modulus, good shock absorption, and can withstand greater impact loads than aluminum alloys, suitable for parts that withstand severe vibrations, such as aircraft landing wheels, etc. ; Specific strength and specific stiffness; soft, easy cutting; good electromagnetic shielding performance; good fatigue strength and shock absorption performance and so on. These advantages of magnesium alloy make it widely used in aerospace, automobile industry, electronic communication and other fields. The production lines of magnesium alloy casings for foreign mobile phones, laptops, projectors and other audio-visual equipment have been in operation for many years....

Claims

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Application Information

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IPC IPC(8): C23C28/00B05B3/00B05B3/02C23C18/20C23C18/40C23G1/02C23G1/14
Inventor 崔建忠赵隆昌赵惠
Owner NORTHEASTERN UNIV
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