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Surface treatment method of aluminum or aluminum alloy and product manufactured by adopting same

A technology of aluminum alloy surface and treatment method, which is applied in the direction of thin material treatment, surface reaction electrolytic coating, electrolytic coating, etc., can solve the problems of complicated process wastewater, affecting the corrosion resistance of aluminum or aluminum alloy substrates, and peeling of electroplating layers, etc. Achieve the effect of simple treatment method, enhanced binding force and less environmental pollution

Inactive Publication Date: 2013-06-26
SHENZHEN FUTAIHONG PRECISION IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the potential of the galvanized layer is lower than that of the aluminum or aluminum alloy substrate and the electroplating layer, the galvanized layer is prone to lateral corrosion in corrosive media, resulting in peeling off of the electroplating layer, which seriously affects the corrosion resistance of the aluminum or aluminum alloy substrate.
In addition, the pretreatment method needs to carry out zinc immersion twice and electroless nickel plating once, and its process is complicated, and it is easy to produce a large amount of waste water

Method used

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  • Surface treatment method of aluminum or aluminum alloy and product manufactured by adopting same
  • Surface treatment method of aluminum or aluminum alloy and product manufactured by adopting same
  • Surface treatment method of aluminum or aluminum alloy and product manufactured by adopting same

Examples

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Embodiment 1

[0035] An aluminum or aluminum alloy substrate 11 is provided, and the material of the aluminum or aluminum alloy substrate 11 is 6061-T6 aluminum alloy.

[0036] Degreasing treatment: the degreasing solution used in the degreasing treatment is R105 degreasing agent (provided by Shenzhen Yongbao Chemical Co., Ltd.), the temperature of the degreasing solution is 60°C, and the degreasing time is 6 minutes.

[0037] Chemical polishing: use an aqueous solution containing 1200g / L phosphoric acid and 60g / L nitric acid as the polishing solution, the temperature of the polishing solution is 95°C, and the polishing time is 13s.

[0038] Peel off the black film: use 30% nitric acid solution as the stripping solution, soak for 1.5 minutes, and the temperature of the stripping solution is room temperature.

[0039] Anodizing treatment: use 120g / l sulfuric acid, 240g / l sulfuric acid and 2g / l ethylenediaminetetraacetic acid (EDTA) aqueous solution as the electrolyte, the temperature of the ...

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Abstract

The invention provides a surface treatment method of aluminum or aluminum alloy. The method comprises the following steps of providing an aluminum or aluminum alloy matrix; carrying out anodic oxidation on the aluminum or aluminum alloy matrix; with aqueous solution containing sulfuric acid, phosphoric acid and ethylene diamine tetraacetic acid as electrolyte, forming an anodic oxide film on the surface of the aluminum or aluminum alloy matrix, wherein the anodic oxide film comprises a barrier layer and a porous layer which are sequentially formed on the surface of the aluminum or aluminum alloy matrix and a plurality of second oxidation layers are also formed in the anodic oxide film and penetrate through the barrier layer and the porous layer; and forming an electroplated layer on the anodic oxide film by adopting an electroplating way. The invention also provides a product manufactured by adopting the method.

Description

technical field [0001] The invention relates to an aluminum or aluminum alloy surface treatment method and a product. Background technique [0002] In the prior art, the aluminum or aluminum alloy substrate is usually electroplated to improve the wear resistance and corrosion resistance of the aluminum or aluminum alloy substrate. Since the aluminum or aluminum alloy substrate is easily oxidized in the air, a loose anodized film is formed on its surface, so that the bonding force between the electroplated coating and the aluminum or aluminum alloy substrate is poor. [0003] In order to solve the above problems, the aluminum or aluminum alloy substrate is usually subjected to two pre-treatments of galvanizing and electroless nickel plating before electroplating, so as to improve the bonding force between the subsequently formed electroplating layer and the aluminum or aluminum alloy substrate. However, since the potential of the zinc-dipped layer is lower than that of the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/10C25D11/18
CPCC25D3/04C25D3/12C25D3/38C25D5/14C25D11/06C25D11/16C25D11/20Y10T428/12361
Inventor 丁亭
Owner SHENZHEN FUTAIHONG PRECISION IND CO LTD
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