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Aluminum alloy anodic oxidation confining liquid and confining method thereof

An anodizing, aluminum alloy technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of high energy consumption, heavy pollution, affecting the performance of oxide films, etc., achieving simple application, simple preparation method, The effect of surface tension reduction

Active Publication Date: 2021-05-07
佛山市三水凤铝铝业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, in order to solve the problems of high energy consumption, heavy pollution, and the thickness of the formed oxide film affecting the performance of the oxide film in the prior art

Method used

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  • Aluminum alloy anodic oxidation confining liquid and confining method thereof
  • Aluminum alloy anodic oxidation confining liquid and confining method thereof
  • Aluminum alloy anodic oxidation confining liquid and confining method thereof

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preparation example Construction

[0030] In addition, the present invention also provides a method for preparing an aluminum alloy anodic oxidation sealing solution, comprising the following steps:

[0031] Add 2 / 3 of the required amount of deionized water into the stirring tank, preheat to 35°C-45°C, add the silica sol, and continue stirring for 1h-3h to obtain mixture A;

[0032] Add the polyurethane, the surfactant, and 1 / 3 of the required amount of deionized water to the mixture A, raise the temperature to 75°C-90°C at a heating rate of 5°C / min, keep warm and continue stirring with the assistance of ultrasound 25min-40min, to obtain mixture B;

[0033] Adjust the pH value of the mixture B to 4.5-6.8, and continue to stir for 5min-10min to obtain the aluminum alloy anodic oxidation sealing solution.

[0034] In one of the embodiments, the ultrasonic auxiliary power is 150W-350W.

[0035] In one of the embodiments, the pH value of the mixture B is adjusted with an acidic regulator.

[0036] In one embodim...

Embodiment 1

[0041] A sealing method for an aluminum alloy anodic oxidation sealing solution, comprising the following steps:

[0042] Add 0.67L of deionized water into the stirring tank, preheat to 35°C, add 6g of nano-silica sol, and continue stirring for 1 hour to obtain mixture A;

[0043] Add 60g of polyurethane, 3g of fatty acid methyl ester ethoxylate, and 0.33L of deionized water to mixture A, raise the temperature to 75°C at a heating rate of 5°C / min, keep warm and continue to stir for 25min with the help of ultrasonic power of 150W. mixture B is obtained;

[0044] Adjust the pH value of the mixture B to 4.5 with an acidic regulator, and continue to stir for 5 minutes to obtain an aluminum alloy anodic oxidation sealing solution, which is set aside;

[0045] Select 2024 aluminum alloy for chemical degreasing → hot water washing → cold water washing → alkali etching → deionized water washing → light → deionized water washing, place 2024 aluminum alloy in 180g / L sulfuric acid solut...

Embodiment 2

[0047] A sealing method for an aluminum alloy anodic oxidation sealing solution, comprising the following steps:

[0048] Add 0.67L of deionized water into the stirred tank, preheat to 45°C, add 12g of nano-silica sol, and continue stirring for 3 hours to obtain mixture A;

[0049] Add 75g of polyurethane, 6g of fatty acid methyl ester ethoxylate, and 0.33L of deionized water to mixture A, raise the temperature to 90°C at a heating rate of 5°C / min, keep it warm and continue to stir for 40min with the help of an ultrasonic power of 350W. mixture B is obtained;

[0050] Adjust the pH value of the mixture B to 6.8 with an acidic regulator, and continue to stir for 10 minutes to obtain an aluminum alloy anodic oxidation sealing solution, which is set aside;

[0051] Select 2024 aluminum alloy for chemical degreasing → hot water washing → cold water washing → alkali etching → deionized water washing → light → deionized water washing, place 2024 aluminum alloy in 180g / L sulfuric acid...

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Abstract

The invention provides an aluminum alloy anodic oxidation confining liquid. The aluminum alloy anodic oxidation confining liquid is prepared from 6 g / L-12 g / L of silica sol, 60 g / L-75 g / L of polyurethane and 3 g / L-6 g / L of a surfactant. According to the aluminum alloy anodic oxidation confining liquid, the nano silica sol, the polyurethane and the surfactant are added to interact with one another, so that the nano silica sol reaches the bottoms of micropores formed by anodic oxidation along with flowing of the polyurethane, the micropores are blocked from inside to outside, and a remarkable sealing effect is achieved; a preparation method of the confining liquid is simple, the confining liquid generates a cavitation effect under the ultrasonic action, the surface tension among molecules is reduced until the balance is achieved, the confining liquid can be applied to the confining process of aluminum alloy more easily, and the confining effect of the aluminum alloy micropores can be improved; and besides, the confining liquid is easy to apply, the confining method is stable, the confining liquid has the advantages of being safe and environmentally friendly under the condition that the confining effect and the film thickness of the confining liquid are guaranteed, and the corrosion resistance of an aluminum alloy anodic oxide film can be obviously improved.

Description

technical field [0001] The invention relates to the technical field of oxide films of aluminum alloys, in particular to an aluminum alloy anodic oxidation sealing solution and a sealing method thereof. Background technique [0002] Aluminum or aluminum alloy is one of the most widely used and used metal materials, but aluminum or aluminum alloy is easy to corrode in humid environment, and it is often treated by anodic oxidation in industry to form a layer of film thickness controllable porosity Anodized film of the structure, in order to improve the corrosion resistance and wear resistance of aluminum or aluminum alloy. However, the anodic oxidation film with a honeycomb porous structure has high porosity and adsorption, which makes it easy to be polluted, and the corrosive medium is easily adsorbed to the pores of the film layer to cause corrosion, which will reduce the service life of aluminum or aluminum alloy. . Therefore, in order to reduce the corrosion rate of alumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/24
CPCC25D11/246
Inventor 章胜杰师英文蓝培鸿
Owner 佛山市三水凤铝铝业有限公司