Die-casting aluminum alloy micro-arc oxidation electrolyte and method thereof as well as product

A technology of micro-arc oxidation and cast aluminum alloy, applied in anodizing, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems of poor corrosion resistance of the film, loose film, coarse particles of the film, etc.

Inactive Publication Date: 2020-05-08
华孚精密科技(马鞍山)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] One of the factors affecting the effect of micro-arc oxidation is the size of the particles on the surface of the micro-arc oxidation film and the size of the micropores. If the pore size of the micropores is too large, the corrosion resistance of the film will be deteriorated.
The content of silicon and copper in the die-casting aluminum alloy is relatively high, and silicon dioxide and cuprous oxide are easily formed during the micro-arc oxidation process, which will lead to coarse particles and micropore diameter changes in the micro-arc oxidation film covering the surface of the die-casting aluminum alloy. Large, loose film layer, so that the corrosion resistance becomes poor

Method used

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  • Die-casting aluminum alloy micro-arc oxidation electrolyte and method thereof as well as product
  • Die-casting aluminum alloy micro-arc oxidation electrolyte and method thereof as well as product

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Embodiment Construction

[0023] A preferred embodiment of the micro-arc oxidation of the die-casting aluminum alloy of the present invention is given below.

[0024] The die-casting aluminum alloy trial production piece is made of die-casting aluminum alloy ADC12, and the size of the die-casting aluminum alloy trial production piece is 110*70*1.5mm. Then, the trial piece is fully degreased and degreased. Usually, the trial piece is put into a cleaning agent with acetone and absolute ethanol as components, and cleaned in an ultrasonic cleaning agent for 5-10 minutes. Then put it into an oven, and dry the trial production sheet at a temperature of 120° C. for later use.

[0025] Prepare micro-arc oxidation solution, the present embodiment selects the sodium phosphate of 10g / L, the sodium hydroxide of 8g / L, the sodium citrate of 12g / L, the sodium tungstate of 10g / L, diethylenetriamine and triethanolamine press 4 : 1 of the mixed solution prepared in the ratio of 10-40g / L, mixed and stirred according to ...

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Abstract

The invention relates to the technical field of micro-arc oxidation, in particular to a die-casting aluminum alloy micro-arc oxidation electrolyte and a method thereof as well as a product. The die-casting aluminum alloy micro-arc oxidation electrolyte comprises water-soluble phosphate with the concentration being 5-30 g/L, alkali metal hydroxide with the concentration being 1-10 g/L, citrate withthe concentration being 5-30 g/L, sodium tungstate with the concentration being 5-30 g/L, a mixed solution with the concentration being 10-40 g/L prepared from diethylenetriamine and triethanolamineaccording to a ratio of 4 to 1, and deionized water is used as a solvent. Compared with the prior art, a die-casting aluminum alloy micro-arc oxidation electrolyte formula can solve the problems thatdue to an existing electrolyte, a prepared micro-arc oxidation film is rough in surface, multiple in micropore and poor in corrosion resistance, and the micropore diameter of the prepared micro-arc oxidation film is only 2-5 microns.

Description

【Technical field】 [0001] The invention relates to the technical field of micro-arc oxidation, in particular to a die-casting aluminum alloy micro-arc oxidation electrolyte, a method and a product thereof. 【Background technique】 [0002] Micro-arc oxidation technology refers to the use of arc discharge to enhance and activate the reaction on the anode on the basis of ordinary anodic oxidation, so as to form high-quality reinforced ceramics on the surface of workpieces made of aluminum, titanium, magnesium metals and their alloys membrane method. By applying a voltage on the workpiece with a special micro-arc oxidation power supply, the metal on the surface of the workpiece interacts with the electrolyte solution to form a micro-arc discharge on the surface of the workpiece. Under the action of high temperature, electric field and other factors, a ceramic film is formed on the metal surface to achieve The purpose of workpiece surface strengthening. [0003] One of the factor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/06
CPCC25D11/024C25D11/026C25D11/06
Inventor 于飞
Owner 华孚精密科技(马鞍山)有限公司
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