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Electrolyte for anodizing of surface of pure aluminum part and method for anodizing of surface of pure aluminum part

An anodic oxidation and electrolyte technology, applied in the field of electrolyte, can solve the problems of poor oxide film hardness, inability to effectively guarantee wear resistance and control foreign matter, achieve low cost, reduce product discharge accidents, and improve wear resistance performance effect

Active Publication Date: 2019-03-05
HENAN PINGZHI HIGH VOLTAGE SWITCHGEAR +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, a Chinese invention patent application with the application publication number CN102925946A discloses a surface treatment method for aluminum materials. The method is to soak the aluminum materials in sulfuric acid solution for 1-2 minutes, and then use sodium hydroxide and nitric acid to The strong alkaline solution composed of sodium solution is used for etching reaction, each liter of strong alkaline solution contains 13-15g of sodium hydroxide, the etching reaction temperature is 20-45°C, the time is 30-60s, and then soaked in sulfuric acid solution ~2min, then soak in sulfuric acid solution, apply voltage, carry out anodic oxidation, soak in nickel acetate aqueous solution to seal the hole, the temperature is 15~30℃, the hole sealing time is 12~16min, finally wash with water and air dry; The surface anodizing treatment of aluminum can realize the sealing of the oxide film on the metal shavings, but the material of pure aluminum is soft, and the hardness of the oxide film formed on the surface of pure aluminum parts by this method is not good, which cannot effectively guarantee wear resistance and control foreign matter Effect

Method used

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  • Electrolyte for anodizing of surface of pure aluminum part and method for anodizing of surface of pure aluminum part
  • Electrolyte for anodizing of surface of pure aluminum part and method for anodizing of surface of pure aluminum part
  • Electrolyte for anodizing of surface of pure aluminum part and method for anodizing of surface of pure aluminum part

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Embodiment 1

[0031] The electrolytic solution used for anodizing the surface of pure aluminum parts in this embodiment is obtained after adding sulfuric acid, glycerol and ceric sulfate into water and mixing them evenly. The mass concentration of sulfuric acid in the electrolytic solution is 160g / L, and the content of glycerin The volume concentration is 6ml / L, and the mass concentration of ceric sulfate is 3g / L.

[0032] The method for anodizing the surface of pure aluminum parts of the present embodiment comprises the following steps:

[0033] 1) Check whether there are bumps and scratches on the surface of the shield, and select a shield without bumps and scratches to degrease with a thinner organic solvent;

[0034] 2) Apply acid and alkali corrosion-resistant glass glue on the conductive part of the shield and cure it to shield the conductive part;

[0035] 3) Soak the shield in inorganic acid for 5s to degrease, then use 25°C water to clean the shield for 1min; then immerse the shield...

Embodiment 2

[0041] The electrolytic solution used for anodizing the surface of pure aluminum parts in this embodiment is obtained after adding sulfuric acid, glycerin and ceric sulfate into water and mixing them evenly. The mass concentration of sulfuric acid in the electrolytic solution is 155g / L, and the content of glycerin The volume concentration is 8ml / L, and the mass concentration of ceric sulfate is 2g / L.

[0042] The method for anodizing the surface of pure aluminum parts of the present embodiment comprises the following steps:

[0043] 1) Check whether there are bumps and scratches on the surface of the shield, and select a shield without bumps and scratches to degrease with a thinner organic solvent;

[0044] 2) Apply acid and alkali corrosion-resistant glass glue on the conductive part of the shield and cure it to shield the conductive part;

[0045] 3) Soak the shield in inorganic acid for 4s to degrease, then use 25°C water to clean the shield for 1min; then immerse the shie...

Embodiment 3

[0051] The electrolytic solution used for anodizing the surface of pure aluminum parts in this embodiment is obtained after adding sulfuric acid, glycerol and ceric sulfate into water and mixing them evenly. The mass concentration of sulfuric acid in the electrolytic solution is 165g / L, and the content of glycerin The volume concentration is 4ml / L, and the mass concentration of ceric sulfate is 4g / L.

[0052] The method for anodizing the surface of pure aluminum parts of the present embodiment comprises the following steps:

[0053] 1) Check whether there are bumps and scratches on the surface of the shield, and select a shield without bumps and scratches to degrease with a thinner organic solvent;

[0054] 2) Apply acid and alkali corrosion-resistant glass glue on the conductive part of the shield and cure it to shield the conductive part;

[0055] 3) Soak the shield in inorganic acid for 3s to degrease, then use 20°C water to clean the shield for 2min; then immerse the shie...

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Abstract

The invention relates to an electrolyte for anodizing of the surface of a pure aluminum part and a method for anodizing of the surface of the pure aluminum part, and belongs to the technical field ofanodizing of aluminum. The electrolyte for anodizing of the surface of the pure aluminum part is a mixed solution of sulfuric acid, glycerin and ceric sulfate, the mass concentration of sulfuric acidis 155-165 g / L, the volume concentration of glycerin is 4-8 ml / L, and the mass concentration of ceric sulfate is 2-4 g / L. By the adoption of the electrolyte for anodizing of the surface of the pure aluminum part, sulfuric acid serves as a main component, a proper amount of glycerin and a proper amount of ceric sulfate are added into the electrolyte, a high-hardness Al2O3 film can be formed on thesurface of the pure aluminum part, the thickness of the Al2O3 film is only 15-30 micrometers, and the Vickers hardness can reach 420-500 HV.

Description

technical field [0001] The invention relates to an electrolyte used for anodizing the surface of pure aluminum parts and a method for anodizing the surface of pure aluminum parts, belonging to the technical field of anodizing of aluminum. Background technique [0002] In the insulating gas chamber of a high-voltage switch, the electric field is mostly uneven, and measures need to be taken to improve the electric field distribution, reduce the local excessive field strength, and improve the overall dielectric strength of the insulating structure. In the insulating gas chamber, parts such as shielding covers, shielding parts, and pressure equalizing rings are usually used to improve this phenomenon. Pure aluminum has excellent corrosion resistance, high thermal conductivity, high electrical conductivity and excellent machinability, but its mechanical properties are low, and it is difficult to clean metal shavings on the surface. The inner shield of the insulating air chamber ...

Claims

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Application Information

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IPC IPC(8): C25D11/08C25D11/16C25D11/18
CPCC25D11/08C25D11/16C25D11/18
Inventor 孙明道张树成史润军刘喜刘晓锋王晓生马晓红张田甜高幼鹏刘守军
Owner HENAN PINGZHI HIGH VOLTAGE SWITCHGEAR
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