Surface treatment method for aluminum alloy

A technology of aluminum alloy surface and treatment method, which is applied in the field of aluminum alloy surface treatment, can solve the problems of unimproved wear resistance, poor ability to adapt to the environment, and uneven conversion film layer, etc., and achieve high brittleness, cost saving, and easy The effect of brazing

Inactive Publication Date: 2013-01-16
昆山市源丰铝业有限公司
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Problems solved by technology

The commonly used method is anodic oxidation method, which forms a conversion film on the surface of aluminum alloy by electrochemical method. Although this method can improve the corrosion res

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  • Surface treatment method for aluminum alloy

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Embodiment Construction

[0019] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0020] see figure 1 , the embodiment of the present invention includes:

[0021] A method for surface treatment of an aluminum alloy, comprising the steps of:

[0022] 1) Degreasing treatment: wipe the surface of aluminum alloy with absorbent cotton wetted with solvent to remove surface oil;

[0023] 2) Etching: Etching the degreased aluminum alloy in an etching solution to remove the oxide film on the surface of the aluminum alloy, then washing and drying;

[0024] 3) Galvanizing: immerse the etched aluminum alloy in the galvanizing solution, keep it at room temperature for 40-50s, wash with water and then dip in the stripping solution for 1mi...

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Abstract

The invention provides a surface treatment method for aluminum alloy. The method comprises the following steps of: 1) degreasing, namely dipping absorbent cotton in solvent, and wiping the surface of the aluminum alloy to remove greasy dirt on the surface; 2) etching, namely etching the degreased aluminum alloy in an etching solution and etching to remove an oxide film on the surface of the aluminum alloy, and washing and drying; 3) plating zinc, namely immersing the etched aluminum alloy in a zinc plating solution, keeping at the room temperature for 40 to 50s, washing, dipping in a stripping solution for 1 minute, washing and drying; 4) plating nickel, namely dipping the aluminum alloy on which zinc is plated in a nickel salt solution and controlling the temperature of the nickel salt solution to be 90 DEG C; and 5) drying. By the mode, the plating layer with high uniformity can be obtained, is high in hardness and brittleness, high in wear resistance and corrosion resistance, and is smooth and easy to braze.

Description

technical field [0001] The invention relates to the field of surface treatment of metal products, in particular to an aluminum alloy surface treatment method. Background technique [0002] Aluminum alloy has a series of advantages such as low density, high specific strength, good corrosion resistance and formability, and low cost. Has a wide range of applications. [0003] The surface of the aluminum alloy is covered with a dense oxide film, which can isolate the aluminum alloy from the surrounding environment and avoid being oxidized. However, this layer of oxide film is easily corroded by strong acid and strong alkali, and the aluminum alloy is prone to intergranular corrosion, with low surface hardness and no wear resistance. [0004] There are many surface treatment methods for aluminum alloys. At present, the more mature and widely used methods are: physical method, chemical method, physical chemical method and comprehensive method. The commonly used method is anodic...

Claims

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Application Information

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IPC IPC(8): C23C18/32C23C18/31
Inventor 朱培元
Owner 昆山市源丰铝业有限公司
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