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Magnesium-lithium alloy surface electrocoppering solution and magnesium-lithium alloy surface electrocoppering treatment method

A magnesium-lithium alloy and electroplating copper technology, which is applied in the electroplating solution of magnesium-lithium alloy surface treatment, and in the field of electroplating copper treatment on the surface of magnesium-lithium alloy, can solve the problems of low efficiency and slow reaction rate, and achieve improved corrosion resistance and anti-corrosion. Corrosion improvement and speed improvement effects

Inactive Publication Date: 2012-11-14
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the principle of electroless plating is realized through a spontaneous chemical reaction, which has a slow reaction rate and low efficiency.

Method used

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  • Magnesium-lithium alloy surface electrocoppering solution and magnesium-lithium alloy surface electrocoppering treatment method
  • Magnesium-lithium alloy surface electrocoppering solution and magnesium-lithium alloy surface electrocoppering treatment method
  • Magnesium-lithium alloy surface electrocoppering solution and magnesium-lithium alloy surface electrocoppering treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The formula of copper plating solution is: copper pyrophosphate 60g / L; potassium pyrophosphate 300g / L; potassium dihydrogen phosphate 40g / L; potassium sodium tartrate 40g / L; citric acid 0.1g / L; Lansu 0.02g / L. Electroplating conditions: electroplating temperature is 30°C; current density is 1A / dm 2 ; pH is 9; electroplating time 30min.

[0033] Specific steps of electroplating copper process:

[0034] Grinding: Grinding the sample, grinding it with 320# and 1500# sandpaper, washing it frequently with distilled water during the grinding process, putting it into acetone for ultrasonic cleaning after grinding, and then drying it with cold air.

[0035] Alkali washing: mix 1g of NaOH, 1.5g of Na 3 PO 4 and 0.5g of Na 2 SiO 3 Add it into 50ml of distilled water, stir it and put it into a water bath at 60°C, then put the polished sample into it, time it for 10 minutes, take it out, wash it in hot water, and then put it into cold distilled water for ultrasonic cleaning ....

Embodiment 2

[0045] The formula of copper plating solution is: copper pyrophosphate 60g / L; potassium pyrophosphate 300g / L; potassium dihydrogen phosphate 40g / L; potassium sodium tartrate 40g / L; citric acid 0.1g / L; Lansu 0.02g / L. Electroplating conditions: electroplating temperature is 40°C; current density is 1A / dm 2 ; pH is 9; electroplating time 40min.

[0046] The specific steps of the copper electroplating process are the same as those in Example 1, except that the copper electroplating temperature is 40° C. and the plating time is 40 minutes.

[0047] The copper coating on the surface of the magnesium-lithium alloy obtained in this embodiment is uniform and compact from a microscopic observation.

Embodiment 3

[0049] The copper plating solution formula is: copper pyrophosphate 50g / L; potassium pyrophosphate 300g / L; dipotassium hydrogen phosphate 40g / L; potassium sodium tartrate 40g / L; citric acid 0.1g / L; Lansu 0.02g / L. Electroplating conditions: electroplating temperature is 30°C; current density is 2A / dm 2 ; pH is 9; electroplating time 40min.

[0050] The specific steps of the copper electroplating process are the same as in Example 1. In this embodiment, the copper electroplating time is 40 minutes, the electroplating temperature is 30° C., and the current is adjusted to 0.04A.

[0051] The copper coating on the surface of the magnesium-lithium alloy obtained in this example is microscopically observed to be uniform and dense on the surface of the copper coating, and has no obvious defects.

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Abstract

The invention provides magnesium-lithium alloy surface electrocoppering solution and a magnesium-lithium alloy surface electrocoppering treatment method. The method comprises the following steps that (1) the magnesium-lithium alloy surface is subjected to pretreatment; (2) the activation is carried out under the room temperature and ultrasonic conditions; (3) the zinc galvanizing is carried out at the temperature being 40 to 60 DEG C; and (4) the electrocoppering is carried out in copper plating solution; the electrocoppering solution consists of 50 to 70g / L of cupric pyrophosphate, 300g / L of potassium pyrophosphate, 40g / L of dipotassium phosphate, 40g / L of potassium sodium tartrate, 0.1 g / L of citric acid, 0.1g / L of phytic acid, 0.02 g / L of vanillin and the balance water; and the electrocoppering comprises the following conditions that the pH is 8 to 9, the temperature is 30 to 50 DEG C, the voltage is 2 to 4V, the current is 0.02 to 0.04 A, and the time is 20 to 40 minutes. The plating layer has the performance which is not reached by the existing magnesium-lithium alloy surface treatment method, meanwhile, the plating layer forming is fast, the plating layer forming speed is accelerated, the surface treatment efficiency is improved, the operation is simple and convenient, the production efficiency is high, and the large-scale popularization and the application are favorably realized.

Description

technical field [0001] The invention relates to a copper electroplating solution, in particular to a copper electroplating solution for surface treatment of magnesium-lithium alloys. The invention also relates to a method for electroplating copper on the surface of the magnesium-lithium alloy. Background technique [0002] Magnesium-lithium alloy is the lightest alloy so far, and it is one of the most potential alloy systems for the development of high-strength ultra-light alloys. Magnesium-lithium alloy has high specific strength, good machinability, excellent electromagnetic shielding and shock resistance and other properties . Therefore, magnesium-lithium alloys will become one of the important high-strength, lightweight and environmentally friendly materials in the 21st century. [0003] For magnesium-lithium alloys, the addition of lithium can reduce the density and improve the plasticity of the alloy, but at the same time, it also significantly reduces the corrosion ...

Claims

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Application Information

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IPC IPC(8): C25D3/38C25D5/42
Inventor 尹婷婷巫瑞智张景怀张密林冷哲杜冠军
Owner HARBIN ENG UNIV
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