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A method of electroplating copper on the surface of magnesium alloy

A magnesium alloy and copper electroplating technology, applied in metal material coating process, solid-state diffusion coating, coating and other directions, can solve the problems of complex process, poor bonding force, high cost, simplify the process, improve the bonding force, The effect of reducing energy consumption

Inactive Publication Date: 2020-10-09
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnesium alloy is subjected to galvanizing treatment first, and then electroplated copper. This method has complicated processes, including alkali cleaning, pickling, activation and galvanizing, and many chemical reagents are used. In the process of activation and galvanizing, respectively Cyanide or fluoride is used, which will have a certain impact on the environment, and the impregnated Zn layer is uneven, porous, and has poor bonding force; (2) electroless plating of magnesium alloys after pickling, alkali cleaning and activation treatment Nickel treatment, the magnesium alloy after electroless nickel plating is then electroplated with copper, which is also a kind of pre-treatment of magnesium alloy copper plating, which is also more complicated and costly
(3) First oxidize the magnesium alloy, coat the oxide layer with conductive resin and then electroplate copper. From the perspective of cost and efficiency, it is not suitable for industrial production
[0004] (1) The process is relatively complicated, the cost is high, and the environment is polluted.
[0005] (2) The uniformity of the pretreatment layer obtained on the surface of the magnesium alloy in advance is not good, and there are many defects

Method used

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  • A method of electroplating copper on the surface of magnesium alloy
  • A method of electroplating copper on the surface of magnesium alloy
  • A method of electroplating copper on the surface of magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Using the AZ81 magnesium alloy with a diameter of Φ18 as the raw material, cut the AZ81 magnesium alloy into a cylindrical shape with a height of 15 mm, polish the sample with sandpaper, and put it into ultrasonic cleaning for 10 minutes. Put the cleaned AZ81 magnesium alloy sample into a ceramic crucible, wrap the sample with 1000 mesh (13 μm) Zn powder, and compact the Zn powder around the sample. Put the crucible containing the AZ81 magnesium alloy sample and Zn powder into an ordinary box-type heating furnace, heat it to 390°C at a heating rate of 15°C / min, and then keep it for 3h, and then keep it for 2h when the temperature drops to 190°C , after removing the remaining Zn powder on the surface of the AZ81 magnesium alloy sample, the surface of the sample was polished flat with sandpaper, then placed in ultrasonic cleaning for 10 minutes, and dried for later use. Configure the copper plating solution, the formula is: 10g / L CuSO 4 , sodium pyrophosphate 30g / L, pota...

Embodiment 2

[0037] Using the AZ81 magnesium alloy with a diameter of Φ18 as the raw material, cut the AZ81 magnesium alloy into a cylindrical shape with a height of 15 mm, polish the sample with sandpaper, and put it into ultrasonic cleaning for 10 minutes. Put the cleaned AZ81 magnesium alloy sample into a ceramic crucible, wrap the sample around with 2000 mesh (6.5 μm) Zn powder, and compact the Zn powder around the sample. Put the crucible containing the AZ81 magnesium alloy sample and Zn powder into an ordinary box-type heating furnace, heat it to 410°C at a heating temperature of 15°C / min and keep it for 2h, and keep it for 1.5h when the temperature drops to 200°C, and remove After the Zn powder remained on the surface of the AZ81 magnesium alloy sample, the surface of the sample was polished flat with sandpaper, put into the ultrasonic wave and cleaned for 10 minutes, and dried for later use. Configure copper plating solution, the formula of the plating solution is: 15g / LCuSO 4 , s...

Embodiment 3

[0039]Using the AZ81 magnesium alloy with a diameter of Φ30 as the raw material, cut the AZ81 magnesium alloy into a cylindrical shape with a height of 15 mm, polish the sample with sandpaper, and put it into ultrasonic cleaning for 10 minutes. Put the cleaned AZ81 magnesium alloy sample into a ceramic crucible, wrap the sample with 1250 mesh (10 μm) Zn powder around the sample, and compact the Zn powder around the sample. Put the crucible containing the AZ81 magnesium alloy sample and Zn powder into an ordinary box-type heating furnace, heat it to 370°C at a heating temperature of 15°C / min and keep it for 4h, and keep it for 1h when the temperature drops to 180°C, and then clean the AZ81 After the Zn powder remains on the surface of the magnesium alloy sample, the surface of the sample is polished with sandpaper, put into the ultrasonic wave and cleaned for 10 minutes, and dried for later use. Configure the copper plating solution, the formula of the plating solution is: 12g / ...

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Abstract

The invention discloses a method for electroplating copper on the surface of a magnesium alloy. The method comprises the following step that firstly, cleaning and degreasing treatment are carried outon the surface of the magnesium alloy; then, diffusion treatment is carried out on the surface of the magnesium alloy by using solid diffusion Zn to obtain a diffusion coating; then annealing treatment is carried out on the diffusion coating, so that the components are homogenized, and diffusion defects are reduced; and finally copper electroplating treatment is carried out on the magnesium alloysubjected to the diffusion and the annealing treatment so as to form a diffusion coating-cooper electroplating composite coating on the surface of the magnesium alloy. According to the method, a soliddiffusion-annealing-copper electroplating method is adopted for preparing the composite coating, so that the process of activating, sensitizing and the like of copper plating on the surface of the magnesium alloy is omitted, and meanwhile, the wear resistance and the corrosion resistance of the magnesium alloy are improved.

Description

technical field [0001] The invention belongs to the technical field of metal surface anticorrosion, and in particular relates to a method for electroplating copper on the surface of a magnesium alloy. Background technique [0002] Magnesium alloy has many advantages such as light specific gravity, high specific strength and specific stiffness. It is known as a green engineering material and is widely used in aerospace, aviation, automobile, electronics, communication and other fields. But magnesium alloy is an extremely active metal, its standard electrode potential is low, and its corrosion resistance is poor, which greatly limits its application range. In order to improve the corrosion resistance of magnesium alloys, surface treatment is often carried out on magnesium alloys. Commonly used surface treatment techniques include: anodic oxidation, chemical conversion, micro-arc oxidation, organic coating, thermal spraying, electroplating, electroless plating, vapor depositio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/42C25D3/38C25D5/50C23C10/36C23C10/60
CPCC23C10/36C23C10/60C25D3/38C25D5/42C25D5/50
Inventor 李秀兰周立玉王宣钟强周新军
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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