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Aluminum alloy hard anodic oxidation device and method

A hard anodizing and anodizing technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve problems such as solution temperature rise and anodizing energy consumption, and achieve uniform void distribution and film formation. Densification, the effect of eliminating adverse effects

Pending Publication Date: 2020-01-24
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Concentration polarization will lead to an increase in energy consumption in anodic oxidation and an increase in solution temperature

Method used

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  • Aluminum alloy hard anodic oxidation device and method
  • Aluminum alloy hard anodic oxidation device and method
  • Aluminum alloy hard anodic oxidation device and method

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0041] Such as figure 1 As shown, this embodiment provides an aluminum alloy hard anodizing device, including a temperature control and heat preservation system, an anodizing system, an auxiliary control system and a power supply. The temperature control and heat preservation system includes a vacuum heat preservation container 10, which is made of stainless steel. The vacuum heat preservation container includes an outer shell and an inner shell, and a vacuum inner cavity is arranged between the outer shell and the inner shell to achieve heat preservation effect. A cooling copper pipe 2 is arranged in the vacuum heat preservation container 10 , and the cooling copper pipe 2 is arranged around the inner wall of the vacuum heat preservation container 10 . The water inlet and the water outlet of the cooling copper pipe 2 are connected with a compressor (not shown in the figure), and R600a refrigerant is housed in the cooling copper pipe 2 . The compressor can be any one of a pis...

Embodiment 2

[0046] This embodiment provides an aluminum alloy anodic oxidation method, comprising the following steps:

[0047] S1. Pretreatment: Ultrasonic cleaning and drying are performed on the aluminum alloy sample and cathode plate made of 2a96 aluminum alloy, and the aluminum alloy sample and cathode plate are respectively fixed in the anode hanger and the electrolytic cell. The aluminum alloy sample and cathode plate are The distance is 10cm;

[0048] S2. Lowering the temperature: Injecting H at a concentration of 120g / L into the reaction tank 2 SO 4 The solution is used as the electrolyte, and the compressor is turned on to cool the electrolyte to -5°C;

[0049] S3. Anodizing: Turn on the stirring device and power supply for anodizing, and the anodizing time is 25 minutes;

[0050] S4. Sealing: use boiling deionized water to seal the anodized aluminum alloy sample, and the sealing time is 15 minutes. figure 2 Metallographic photograph of the oxide film prepared for this exampl...

Embodiment 3

[0052] This embodiment provides an aluminum alloy anodic oxidation method, comprising the following steps:

[0053] S1. Pretreatment: Ultrasonic cleaning and drying are performed on the aluminum alloy sample and cathode plate made of 2a96 aluminum alloy, and the aluminum alloy sample and cathode plate are respectively fixed in the anode hanger and the electrolytic cell. The aluminum alloy sample and cathode plate are The distance is 8cm;

[0054] S2. Lowering the temperature: Injecting H at a concentration of 120g / L into the reaction tank 2 SO 4 The solution is used as the electrolyte, and the compressor is turned on to cool the electrolyte to -10°C;

[0055] S3. Anodizing: Turn on the stirring device and power supply for anodizing, and the anodizing time is 35 minutes;

[0056] S4. Sealing: use boiling deionized water to seal the anodized aluminum alloy sample, and the sealing time is 15 minutes. image 3 Metallographic photograph of the oxide film prepared for this examp...

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Abstract

The invention discloses an aluminum alloy hard anodic oxidation device and method. The aluminum alloy hard anodic oxidation device comprises a temperature control and heat preservation system, an anode oxidation system, an auxiliary control system and a power supply. The temperature control and heat preservation system comprises a vacuum heat preservation container provided with a cooling medium.A cooling copper pipe is arranged in the vacuum heat preservation container. The anode oxidation system is arranged in the vacuum heat preservation container. An anodic oxidation device comprises an electrolytic cell. A cathode plate and an anode hanging tool are arranged in the electrolytic cell. The auxiliary control system is arranged between the cathode plate and the anode hanging tool and comprises an L-shaped supporting frame. The L-shaped supporting frame comprises a vertical plate and a transverse plate which are perpendicular to each other. The vertical plate is fixed to the electrolytic cell. A stirring device and a temperature sensor are mounted on the transverse plate. The power supply is an adjustable constant-current constant-voltage power supply. The aluminum alloy hard anodic oxidation device and method can be used for timely heat dissipation and cooling during anodic oxidation and reducing adverse effects of high temperature on the performance of an oxidation film in the anodic oxidation process.

Description

technical field [0001] The invention relates to the technical field of anodic oxidation of aluminum alloys, and more specifically, to an aluminum alloy hard anodic oxidation device and method. Background technique [0002] Aluminum alloy materials have the characteristics of low density, strong toughness, weldability, and easy forming and processing. However, aluminum alloys are light and soft, low hardness, poor corrosion resistance, low melting point and other shortcomings, which have been criticized in the industry. Therefore, in order to improve the surface hardness, corrosion resistance and melting point of aluminum alloys, it is necessary to carry out surface treatment on aluminum alloys, and anodizing is the most commonly used surface treatment method for aluminum and aluminum alloys. The process of using an aluminum alloy product as an anode in an electrolyte solution and using electrolysis to form a dense aluminum oxide film on its surface is called anodic oxidatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/16C25D11/18C25D17/02C25D21/02C25D21/10
CPCC25D11/005C25D11/16C25D11/18C25D17/02C25D21/02C25D21/10
Inventor 阳建君范才河雷新蕾孙斌吴艳辉欧玲王博文
Owner HUNAN UNIV OF TECH
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