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Pore sealing method of 7-series aluminum alloy

An aluminum alloy and hole sealing technology, applied in the field of alloys, can solve problems such as film bursting and film thickness, and achieve the effect of avoiding local shedding

Inactive Publication Date: 2018-12-11
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the existing 7-series high-strength aluminum alloy has a thin film thickness and the film bursts when the hole is sealed, so as to provide a 7-series aluminum alloy that can obtain a thicker film thickness without film bursting sealing method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Degreasing: Hang the product on a hanger and place it in a neutral degreasing tank for 10 minutes. The degreasing agent is: 1012 (Dongguan Sihui Surface Treatment Technology Co., Ltd.). The degreasing method is to use a conventional titanium alloy hanger, use a carbon plate as the anode, and the hanger with the product as the cathode for electrolytic degreasing, the voltage is 3V, and the temperature is 60°C;

[0034] 2. Alkali etching: place the product after the above degreasing treatment in an alkaline etching solution for 5 seconds. The alkaline etching solution is: 55g / L sodium hydroxide, temperature 60°C;

[0035] 3. Neutralization: Place the alkali-etched product in a neutralizing solution for 10 seconds. The neutralizing solution is: 30ml / L nitric acid, and the temperature is normal temperature;

[0036] 4. Polishing: chemically polish the neutralized product for 4 seconds, the chemical polishing solution is: 750ml / L phosphoric acid and 250ml / L sulfuric acid...

Embodiment 2

[0042] 1. Degreasing: Hang the product on the hanger, which is made of rubber, and then put the product in a neutral degreasing tank for 10 minutes. The degreasing agent is: 1012 (Dongguan Sihui Surface Treatment Technology Co., Ltd.);

[0043] 2. Alkali etching: place the product after the above degreasing treatment in an alkaline etching solution for 10 seconds. The alkaline etching solution is: 55g / L sodium hydroxide, temperature 60°C;

[0044] 3. Neutralization: Place the alkali-etched product in a neutralizing solution for 10 seconds. The neutralizing solution is: 30ml / L nitric acid, and the temperature is normal temperature;

[0045] 4. Polishing: chemically polish the neutralized product for 4 seconds, the chemical polishing solution is: 750ml / L phosphoric acid and 250ml / L sulfuric acid;

[0046] 5. Put the polished product in an anodic oxidation tank for anodic oxidation. The anodic oxidation solution is: 210g / L sulfuric acid, the anode voltage is 14V, the temperature...

Embodiment 3

[0051] 1. Degreasing: Hang the product on the hanger, hang the magnesium block on the hanger, and then put the product in a neutral degreasing tank for 10 minutes. The degreasing agent is: 1012 (Dongguan Sihui Surface Treatment Technology Co., Ltd.);

[0052] 2. Alkali etching: place the product after the above degreasing treatment in an alkaline etching solution for 10 seconds. The alkaline etching solution is: 55g / L sodium hydroxide, temperature 60°C;

[0053] 3. Neutralization: Place the alkali-etched product in a neutralizing solution for 10 seconds. The neutralizing solution is: 30ml / L nitric acid, and the temperature is normal temperature;

[0054] 4. Polishing: chemically polish the neutralized product for 4 seconds, the chemical polishing solution is: 750ml / L phosphoric acid and 250ml / L sulfuric acid;

[0055] 5. Put the polished product in an anodic oxidation tank for anodic oxidation. The anodic oxidation solution is: 210g / L sulfuric acid, the anode voltage is 14V, ...

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Abstract

The present invention provides a pore sealing method of a 7-series aluminum alloy, wherein an anodized aluminum alloy as a negative electrode is placed in a pore sealing agent and is subjected to poresealing in the case of electrifying. With the method, the thickness of the oxide film can be increased while the film corrosion rate can be reduced.

Description

technical field [0001] The invention relates to the field of alloys, in particular to a hole sealing method for 7 series aluminum alloys. Background technique [0002] With the development of electronic technology, people pay more and more attention to the appearance and texture of electronic products, and the metal shell can bring a very good texture, which has developed rapidly in recent years. At present, the commonly used metal is aluminum alloy, and in order to enhance the corrosion resistance and surface decoration performance of aluminum alloy, anodic oxidation of aluminum alloy is a common method. Generally, an anodic oxidation film is formed on the surface of aluminum alloy, and then dyed and sealed. [0003] At present, in order to enhance the strength of the aluminum alloy shell, 7-series high-strength aluminum alloys are generally used to prepare the metal shell. However, when the 7-series high-strength aluminum alloy products are sealed, the chemical sealing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/20C25D11/24C25D11/08C25D11/16
CPCC25D11/20C25D11/08C25D11/16C25D11/246
Inventor 廖重重黄玉枭徐育兵陈梁
Owner BYD CO LTD
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