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Preparation method of porous anodic aluminum oxide film

A technology of aluminum oxide film and porous anode, which is used in anodizing, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problem of uneven pore size, and achieve uniform pore size distribution, high order, and simple and controllable reaction process. Effect

Active Publication Date: 2019-07-09
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that various factors include the type of electrolyte, concentration, oxidation voltage, oxidation time, oxidation temperature, etc. These complex factors lead to the prepared pores tend to be randomly distributed, and the pore size is not uniform.

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  • Preparation method of porous anodic aluminum oxide film
  • Preparation method of porous anodic aluminum oxide film
  • Preparation method of porous anodic aluminum oxide film

Examples

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Effect test

Embodiment 1

[0024] The preparation method of the aluminum oxide film sample in this embodiment is as follows:

[0025] (1) Pure aluminum surface pretreatment process: the pure aluminum material is cut, cleaned, degreased, and lye film removed in sequence;

[0026] (2) Put the pure aluminum pretreated in step (1) into the malonic acid solution with a mass fraction of 1.0mol / L, the additive is mannitol, and carry out constant voltage anodic oxidation, the primary oxidation time is 4h, and the temperature is 0 ℃, the oxidation voltage is 100V;

[0027] (3) After anodized pure aluminum is depressurized to remove the barrier layer, rinse it with tap water, ultrasonically clean it for 5 minutes, rinse it with deionized water, and then soak it in the film removal solution. The film removal solution is composed of phosphoric acid and chromium trioxide. Among them, each liter of film removal solution contains 10g of chromium trioxide, 10mL of phosphoric acid, and the balance is water, soaking tim...

Embodiment 2

[0030] The preparation method of the aluminum oxide film sample in this embodiment is as follows:

[0031] (1) Pure aluminum surface pretreatment process: the pure aluminum material is cut, cleaned, degreased, and lye film removed in sequence;

[0032] (2) Put the pretreated pure aluminum in step (1) into the malonic acid solution with a mass fraction of 2.0mol / L, the additive is diethylene glycol, and carry out constant voltage anodic oxidation. 1h, temperature 5°C, oxidation voltage 80V;

[0033] (3) After anodized pure aluminum is decompressed to remove the barrier layer, rinse it with tap water, ultrasonically clean it for 10 minutes, rinse it with deionized water, and then soak it in the film removal solution. The film removal solution is composed of phosphoric acid and chromium trioxide. Among them, each liter of film removal solution contains 25g of chromium trioxide, 35mL of phosphoric acid, and the balance is water. The soaking time is 0.5h, and the temperature is 90...

Embodiment 3

[0036] The preparation method of the aluminum oxide film sample in this embodiment is as follows:

[0037] (1) Pure aluminum surface pretreatment process: the pure aluminum material is cut, cleaned, degreased, and lye film removed in sequence;

[0038] (2) Put the pure aluminum pretreated in step (1) into the prepared malonic acid solution with a mass fraction of 1.0mol / L, and the additive is mannitol, and carry out constant voltage anodic oxidation, the primary oxidation time is 2h, and the temperature is 3 ℃, the oxidation voltage is 100V;

[0039] (3) After anodized pure aluminum is depressurized to remove the barrier layer, rinse it with tap water, ultrasonically clean it for 5 minutes, rinse it with deionized water, and then soak it in the film removal solution. The film removal solution is composed of phosphoric acid and chromium trioxide. Among them, each liter of film removal solution contains 20g of chromium trioxide, 25mL of phosphoric acid, and the balance is water...

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Abstract

The invention belongs to the technical field of aluminum oxide film preparation, and in particular relates to a preparation method of a porous anodic aluminum oxide film. The preparation method specifically comprises the following steps of (1), carrying out cleaning, oil degreasing and film removing on the surface of pure aluminum; (2) putting the pure aluminum into malonic acid oxidation solutionand adding additives to carry out constant-voltage anodic oxidation for the first time; (3) washing the oxidized aluminum, soaking the aluminum in a film removing liquid consisting of phosphoric acid, chromium trioxide and water for film removing treatment; and (4) taking out the aluminum, performing anodic oxidation for the second time after cleaning, and then washing and drying. The anodic aluminum oxide film prepared by the method has highly ordered pores with uniform pore size distribution.

Description

technical field [0001] The invention belongs to the technical field of aluminum oxide film preparation, and in particular relates to a preparation method of a porous anodic aluminum oxide film. Background technique [0002] With the development of social economy and the continuous emergence of various new technologies, anodized aluminum film has gradually entered people's field of vision. Compared with other templates, the anodized aluminum film has excellent performance in terms of corrosion resistance, high temperature and high pressure, and high chemical stability. main template. With the in-depth research on aluminum oxide film, aluminum oxide film has been widely used. Whether the alumina film is directly used or used as a template to prepare other nanomaterials, higher requirements are placed on the fine structure of the alumina film. Therefore, the preparation of anodized alumina templates with regularly arranged nanopores is a prerequisite for its wider applicatio...

Claims

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Application Information

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IPC IPC(8): C25D11/12C25D11/08C25D11/10
CPCC25D11/08C25D11/10C25D11/12
Inventor 闾雪娇马迪李树白于冬梅
Owner JIANGSU UNIV OF TECH
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