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Preparing method for magnesium alloy black microarc oxidation film

A technology of micro-arc oxidation and magnesium alloy, applied in the direction of anodizing and other directions, can solve the problems of easy fading and discoloration of the surface, environmental pollution, cyanide in the plating solution, etc., and achieve the effects of simple preparation process, low cost and good uniformity

Inactive Publication Date: 2017-12-01
深圳市粤辉煌环保技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stability of the plating solution is not good enough, and the plating solution usually contains cyanide, which is easy to pollute the environment
In addition, organic coloring is usually done by paint or powder coating. After a certain period of use, the surface is easy to fade and change color, which will affect the appearance of the product

Method used

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  • Preparing method for magnesium alloy black microarc oxidation film
  • Preparing method for magnesium alloy black microarc oxidation film
  • Preparing method for magnesium alloy black microarc oxidation film

Examples

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preparation example Construction

[0028] see figure 1 , a synthesis flow chart of a black micro-arc oxidation film on magnesium alloy according to a preferred embodiment of the present invention. The preparation method of the black micro-arc oxidation film of the magnesium alloy comprises the following steps:

[0029] Step S100, dissolving sodium silicate, potassium fluoride and potassium hydroxide in a solvent to obtain a mixed solution.

[0030] Wherein, the solvent is, for example, but not limited to pure water, high-purity water or ultra-pure water, and other solutions without impurity ions can also be used in the present invention.

[0031] It can be understood that pure water (deionized water) refers to pure water after removing impurities in the form of ions. High-purity water mainly refers to water with a conductivity of less than 0.1us / cm, a pH value of 6.8-7.0, and water that removes other impurities and bacteria when the temperature of the water is 25°C. Ultrapure water refers to water with a res...

Embodiment 1

[0045] Mix the sodium silicate, potassium fluoride and potassium hydroxide with deionized water in proportion to obtain a mixed solution. Wherein, the consumption of the sodium silicate is 8g / L, the consumption of the potassium fluoride is 5g / L, and the consumption of the potassium hydroxide is 7g / L. Subsequently, basic copper carbonate and potassium sodium tartrate were added to the mixed solution and stirred evenly to obtain a micro-arc oxidation electrolyte. Wherein, the consumption of described basic copper carbonate is 5g / L. The consumption of described sodium potassium tartrate is 3g / L.

[0046] The magnesium alloy substrate and the stainless steel plate are placed in the micro-arc oxidation electrolyte for micro-arc oxidation treatment. Wherein, the magnesium alloy substrate is used as the anode, and the stainless steel plate is used as the cathode, and the process parameters for controlling the micro-arc oxidation are shown in Table 1. After 3 minutes of electrificat...

Embodiment 2

[0050] Mix the sodium silicate, potassium fluoride and potassium hydroxide with deionized water in proportion to obtain a mixed solution. Wherein, the consumption of the sodium silicate is 8g / L, the consumption of the potassium fluoride is 5g / L, and the consumption of the potassium hydroxide is 7g / L. Subsequently, basic copper carbonate and potassium sodium tartrate were added to the mixed solution and stirred evenly to obtain a micro-arc oxidation electrolyte. Wherein, the consumption of described basic copper carbonate is 4g / L. The consumption of described sodium potassium tartrate is 2g / L.

[0051]The magnesium alloy substrate and the stainless steel plate are placed in the micro-arc oxidation electrolyte for micro-arc oxidation treatment. Wherein, the magnesium alloy substrate is used as the anode, and the stainless steel plate is used as the cathode, and the process parameters for controlling the micro-arc oxidation are shown in Table 2. After 6 minutes of electrificati...

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Abstract

Disclosed is a preparing method for a magnesium alloy black microarc oxidation film. The preparing method for the magnesium alloy black microarc oxidation film comprises the following steps that sodium silicate, potassium fluoride and potassium hydroxide are dissolved in a solvent, and a mixed solution is obtained; basic cupric carbonate and sodium potassium tartrate tetrahydrate are added into the mixed solution so as to prepare a microarc oxidation electrolyte solution, and the dosage of the basic cupric carbonate is 2-5 g / L; and a magnesium alloy base material is used as an anode, a stainless steel plate is used as a cathode, the magnesium alloy base material and the stainless steel plate are completely submerged in the microarc oxidation electrolyte solution, and microarc oxidation treatment is conducted for a period of time by using pulsed power supply, so that the black microarc oxidation film is formed on the surface of the magnesium alloy base material. According to the preparing method for the magnesium alloy black microarc oxidation film, the preparing technology is simple, the cost is low, and the black microarc oxidation film formed on the surface of the magnesium alloy base material is good in uniformity and compactness.

Description

technical field [0001] The invention belongs to the technical field of surface modification of magnesium alloy substrates, and in particular relates to a method for preparing a black micro-arc oxidation film of magnesium alloys. Background technique [0002] Magnesium alloy is the third largest metal engineering material after steel and aluminum alloy. Magnesium alloys are widely used in electronic product housing materials and light vehicle steering system materials due to their light weight, auxiliary heat dissipation, electromagnetic compatibility, long service life, and environmental protection. In order to satisfy consumers' diverse needs for magnesium alloy surface decoration, it is necessary to modify the surface of the magnesium alloy substrate, for example, to color the surface of the magnesium alloy substrate. [0003] At present, the technologies for coloring the surface of magnesium alloy substrates mainly include chemical conversion, metal coating, organic colo...

Claims

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Application Information

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IPC IPC(8): C25D11/30
CPCC25D11/30C25D11/024C25D11/026
Inventor 潘力毛启航
Owner 深圳市粤辉煌环保技术有限公司
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