Oxidation process for aluminum alloy anode

A technology of anodic oxidation and anodic oxidation film, applied in the direction of anodic oxidation, etc., can solve the problem of not being able to adhere tightly, and achieve the effects of strong adsorption, increased added value, and high corrosion resistance

Inactive Publication Date: 2018-04-20
FOSHAN CITY GAOMING GAOSHENG ALUMINUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 4. The oxidation product is partially dissolved and cannot be tightly attached to the anode (electrolytic polishing)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Specific steps are as follows:

[0034] S01, chemical polishing:

[0035] Put the aluminum alloy in a chemical polishing solution at 90-95°C for polishing. The composition of the polishing solution is 55g / L phosphoric acid, 4g / L nitric acid, 12.8g / L acetic acid, and 0.005g / L copper chloride; the polishing time is 30s.

[0036] The purpose of chemical polishing is to obtain a smooth and neat treatment plane on the surface of the aluminum alloy sample, and to remove the natural oxide layer and possible adherent stains on the surface. Compared with mechanical polishing, chemical polishing can obtain a smoother and more uniform surface, and at the same time, it can improve the surface activity of aluminum alloy materials.

[0037] S02, pre-processing:

[0038] The aluminum alloy sample after polishing is placed in the degreasing liquid of circulating flow, and degreasing liquid component and component content are sodium carbonate 2.5wt%, sodium phosphate 6wt%, surfactant ...

Embodiment 2

[0056] In the present embodiment, the conditions are all the same as in Example 1, and the changed conditions are: the coconut oil fatty acid diethanolamide of 0.04g / L has also been added in the color paste. Coconut oil fatty acid diethanolamide can not only increase the permeability of the color paste to the anodized film on the surface of the aluminum alloy sample, but also make the plant fragrance more intense.

[0057] In this embodiment, the final good product rate of the aluminum alloy sample was 98%.

Embodiment 3

[0059] The conditions in this example are the same as in Example 1, except that 0.04 g / L of barium metaborate is added to the color paste, which can improve the stability of the color paste and make it more resistant to storage.

[0060] In this embodiment, the final good product rate of the aluminum alloy sample was 98%.

[0061] The anodic oxidation process in the present invention can also be used for color registration, that is, the step S05 can be repeated by using color pastes of different colors, and patterns of various colors can be obtained.

[0062] It can be seen from the description of the above examples that the aluminum alloy anodic oxidation process provided in the present invention adopts the sulfuric acid anodic oxidation method, supplemented by matching components and methods, so that the prepared aluminum alloy anodic oxidation film has a natural fragrance and improves The added value of anodized coatings. Furthermore, the anodic oxidation film prepared by ...

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Abstract

The invention discloses an oxidation process for an aluminum alloy anode. The process comprises the steps of 01, chemical polishing, specifically, an aluminum alloy is placed in chemical polishing solution with 90-95 DEG C to be polished; 02, pretreatment, specifically, the polished aluminum alloy is placed in a circulating degreasing fluid; 03, washing, specifically, after degreasing is completed, water with 50-55 DEG C is used to spray the surface until no residue is on the surface of the aluminum alloy ; 04, anode oxidation, specifically, the washed aluminum alloy is immediately placed intoan anode oxidation solution for anode oxidation; 05, coloring treatment; and 06, hole sealing treatment. The oxidation process for the aluminum alloy anode adopts a sulfuric acid anode oxidation method, supplemented with matched components and methods, the prepared aluminum alloy anodic oxide film has natural fragrance, and the added value of anodic oxide film is improved; and furthermore, the anodic oxide film prepared the oxidation process for the aluminum alloy anode is high in hardness, multiple in voids and high in adsorption force, and is beneficial to dye, and has high corrosion resistance after closed treatment.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy surface treatment, and in particular relates to an aluminum alloy anodic oxidation process. Background technique [0002] Under normal circumstances, a layer of 0.2-0.6μm natural oxide film will be formed on the surface of aluminum alloy, thus preventing further corrosion of aluminum. The natural oxide film on the surface of the aluminum alloy is very thin and soft, so it is easily damaged and loses its protective effect. At the same time, the oxide film on the surface of the aluminum alloy has a certain conductivity, and it is difficult to prevent the aluminum alloy substrate from being subjected to electrochemical corrosion. Therefore, in order to effectively protect aluminum alloy products from corrosion in different environments, it is necessary to artificially manufacture a thicker oxide film with excellent performance, and to oxidize the surface of aluminum alloys, usually using chem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/16C23F3/03C23G1/24C25D11/08C25D11/10C25D11/24
CPCC25D11/16C23F3/03C23G1/24C25D11/08C25D11/10C25D11/24C25D11/246
Inventor 刘镇华刘敏华谭泽权
Owner FOSHAN CITY GAOMING GAOSHENG ALUMINUM CO LTD
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