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Novel aluminum alloy anodic oxidation process

A technology of anodizing and anodizing film, applied in the direction of anodizing, can solve the problem of not being able to adhere closely, and achieve the effect of strong adsorption, increased added value, and high hardness

Inactive Publication Date: 2018-04-27
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, mechanical polishing:

[0035] Use diatomaceous earth polishing agent to polish the surface of the aluminum alloy sample to be treated to a mirror finish. After polishing, use a roughness tester to test the surface roughness of different positions (10 positions) of the aluminum alloy sample. The measured surface roughness The average value of Ra is within the range of 0.1-0.15 μm.

[0036] The purpose of mechanical 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. The roughness needs to be reasonably controlled, otherwise the oxide film produced by the anodic oxidation process will easily produce undulating shapes on the macroscopic visual surface, which will affect the yield.

[0037] S02, pre-processing:

[0038] Place the polished aluminum alloy sample in a circulating degreasing solutio...

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 0.02g / 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 0.03 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 embodiments that the anodic oxidation process provided in the present invention adopts the sulfuric acid anodic oxidation method, supplemented by a suitable method, so that the prepared aluminum alloy anodized film has a natural fragrance and enhances its added value. Furthermore, the anodic oxidation film prepared by the anodic oxidation process in the present invention ha...

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Abstract

The invention discloses a novel aluminum alloy anodic oxidation process. The novel aluminum alloy anodic oxidation process comprises the following steps: (S01) mechanical polishing is performed; (S02)pretreatment: a polished aluminum alloy is put in circular flowing degreasing liquid for degreasing; (S03) cleaning: after degreasing is finished, water of 50-55 DEG C is used for spraying the surface of the aluminum alloy until no residue is on the surface; (S04) anodic oxidation: the cleaned aluminum alloy is immediately put in anodic oxidation liquid for anodic oxidation; (S05) coloring: the aluminum alloy treated in the step (S04) is cleaned until no residue is on the surface, and is dried; and screen printing of color paste is performed on an anodic oxidation film of the aluminum alloy;and (S06) the hole sealing treatment is performed by 10-12 min. The anodic oxidation process adopts a sulfuric acid anodic oxidation method; and through assistance by mated methods, the prepared anodic oxidation film of the aluminum alloy has natural fragrance to improve additional value. Further, the anodic oxidation film prepared by the anodic oxidation process is high in hardness, more in air gaps and high in absorption force, facilitates dyeing, and achieves higher corrosion resistance after closing treatment.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy surface treatment, and in particular relates to a novel 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...

Claims

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Application Information

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