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Aluminum alloy surface treatment method

A technology of aluminum alloy surface and treatment method, which is applied in the direction of surface reaction electrolytic coating, electrolytic coating, anodic oxidation, etc., which can solve the difficulty in balancing the quality and energy consumption of oxide film, the distribution of energy-consuming metal nanoparticles, and the easy generation of oxide film cracks and other problems to achieve the effect of solving the uneven distribution of metal nanoparticles, improving the distribution and migration of ions, and improving the uneven distribution of current

Active Publication Date: 2020-01-14
FOSHAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a surface treatment of aluminum alloy ( Ultrasonic-assisted anodic oxidation and electrodeposition) method, which uses ultrasonic-assisted anodic oxidation to increase the anodic oxidation temperature to 30°C, which solves the problem that the quality of the oxide film and energy consumption are difficult to balance. At the same time, the method is simple in process and easy to control. No need to add additional organic or inorganic additives, environmentally friendly and low cost

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] Pretreatment: put the aluminum alloy sample in 30g / L NaOH, 0.2g / L C 12 h 25 SO 4 Na (sodium lauryl sulfate) and 1g / L C 6 h 11 NaO 7 (sodium gluconate) in the mixed solution of alkali washing for 3min; the sample after alkali washing is rinsed with deionized water, put into 10% H 2 SO 4 and 4% HNO 3 Pickling in the mixed solution for 5 minutes to obtain an aluminum alloy sample with a smooth surface and active chemical properties, which is ready for use.

[0027] S1: Put the pretreated aluminum alloy sample into an anodizing tank filled with sulfuric acid solution (170g / L), and use 1.2A / dm 2 The direct current, and the auxiliary power of 80W ultrasonic wave is anodized for 30min, and the intermediate A is obtained, and the oxidation temperature is 15°C; Adjust the ultrasonic power to 20W for 2 minutes, and then slowly adjust to 80W for the rest of the anodic oxidation;

[0028] S2: Rinse the intermediate A obtained after anodic oxidation with deionized water, pu...

Embodiment 2

[0031] Pretreatment: put the aluminum alloy sample in 30g / L NaOH, 0.2g / L C 12 h 25 SO 4 Na and 1g / LC 6 h 11 NaO 7 Wash with alkali in the mixed solution for 3 minutes; rinse the sample after alkali washing with deionized water, put in 10% H 2 SO 4 and 4% HNO 3 Pickling in the mixed solution for 5 minutes to obtain an aluminum alloy sample with a smooth surface and active chemical properties, which is ready for use.

[0032] S1: Put the pretreated aluminum alloy sample into an anodic oxidation tank filled with sulfuric acid solution (170g / L), using 1.4A / dm 2 The direct current, and the auxiliary power of 80W ultrasonic wave is anodized for 30min, and the intermediate A is obtained, and the oxidation temperature is 20°C; Adjust the ultrasonic power to 20W for 2 minutes, and then slowly adjust to 80W for the rest of the anodic oxidation;

[0033] S2: Rinse the intermediate A obtained after anodic oxidation with deionized water, put it into a 4 Electrolytic coloring solu...

Embodiment 3

[0036] Pretreatment: put the aluminum alloy sample in 30g / L NaOH, 0.2g / L C 12 h 25 SO 4 Na and 1g / LC 6 h 11 NaO 7 Wash with alkali in the mixed solution for 3 minutes; rinse the sample after alkali washing with deionized water, put in 10% H 2 SO 4 and 4% HNO 3 Pickling in the mixed solution for 5 minutes to obtain an aluminum alloy sample with a smooth surface and active chemical properties, which is ready for use.

[0037] S1: Put the pretreated aluminum alloy sample into an anodic oxidation tank filled with sulfuric acid solution (170g / L), and use 1.7A / dm 2 DC, and an auxiliary power of 80W ultrasonic wave was anodized for 30 minutes to obtain intermediate A, and the oxidation temperature was 25°C; Adjust the ultrasonic power to 20W for 2 minutes, and then slowly adjust to 80W for the rest of the anodic oxidation;

[0038] S2: Rinse the intermediate A obtained after anodic oxidation with deionized water, put it into a 4 Electrolytic coloring solution with main salt...

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Abstract

The invention discloses an aluminum alloy surface treatment method which comprises the steps of ultrasonic-assisted anodic oxidation, ultrasonic-assisted alternating current deposition and hole sealing treatment for an aluminum alloy sample. By adopting the method, an oxide film generated under the condition of maximum 30 DEG C has no pulverization or crack, metal nanoparticles in multiple pores of the anodic oxide film are uniformly distributed after alternating current deposition, and the problems that the quality and energy consumption of the oxide film are difficult to consider at the sametime and the metal nanoparticles are not uniformly distributed in the electrolytic coloring process are solved. Meanwhile, compared with the prior art, the method does not depend on the influence ofadditives on anodic oxidation and electrolytic coloring, is environmentally friendly, simple, convenient and energy-saving, and has a good application prospect. In addition, the process is convenient,the flow is simple, and controllability is high; common constant current and common industrial alternating current are used, popularization is facilitated, and good application prospect is achieved in aspects of building aluminum alloy profiles, electronic equipment housings, household appliances and the like.

Description

technical field [0001] The invention relates to the technical field of metal material surface treatment, in particular to an aluminum alloy surface treatment method. Background technique [0002] Aluminum alloy is a widely used light alloy material, often used in construction, aerospace, living appliances, electronic equipment and other fields. In order to improve the service life and surface properties of aluminum alloy materials, various surface treatment technologies are often carried out on the surface of aluminum alloys. Among them, the anodic oxidation technology can make the aluminum alloy surface obtain better wear resistance, corrosion resistance and aging resistance. In addition, in practical applications, the aluminum alloy samples after anodic oxidation usually need coloring treatment to further improve their decoration and corrosion resistance, and the nanoporous structure after anodic oxidation also provides the basis for its coloring treatment. Aluminum allo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/22C25D11/08
CPCC25D11/22C25D11/08
Inventor 陈东初魏红阳常萌蕾
Owner FOSHAN UNIVERSITY
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