Aluminum alloy surface treatment method

A technology of aluminum alloy surface and treatment method, which is applied in the field of processing, can solve the problems of waste of resources, a large amount of water washing, poor compatibility of chemicals, etc., and achieve the effects of safe processing and production, improving whiteness and avoiding damage

Active Publication Date: 2021-12-14
SHENZHENSHI YUZHAN PRECISION TECH CO LTD
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  • Application Information

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Problems solved by technology

The main disadvantage of alkali etching is that the amount of corrosion to aluminum alloy is large (the corrosion amount of metal by the general alkali etching method is 7%), which causes a waste of resources and increases production costs
The main disadvantage of acid etching is that the use of ammonium bifluoride and other agents will release toxic hydrogen fluoride gas and discharge fluorine-containing and ammonia-containing wastewater to pollute the environment
And regardless of alkali etching or acid etching, due to the poor compatibility of the chemicals used, a large amount of water washing is required after each step

Method used

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intervening element at the same time. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present.

[0021] Unless otherwise defined, all technical and scientific terms used here...

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Abstract

The present invention provides an aluminum alloy surface treatment method, which includes the following steps: performing alkali etching on an aluminum alloy to form a first structure part on the surface of the aluminum alloy, and the first structure part includes a plurality of evenly distributed first structure parts. A groove; water washing the aluminum alloy; acid etching the aluminum alloy to form a second structure part, the second structure part includes a plurality of second grooves evenly distributed on the first structure part. The surface of the aluminum alloy treated by the invention has a uniform and fine white atomized appearance. The concentration of chemical reagents used in the aluminum alloy surface treatment method of the present invention is relatively low, and the corrosion amount to the aluminum alloy is less than 5%, so that the size of the aluminum alloy is prevented from being damaged. The aluminum alloy surface treatment method of the present invention avoids the use of fluorine-containing ion reagents, and is safer during processing and production.

Description

technical field [0001] The invention relates to the field of processing, in particular to an aluminum alloy surface treatment method. Background technique [0002] Many aluminum alloy workpieces need surface treatment before leaving the factory to improve the appearance of aluminum alloy workpieces. Among them, the effect of surface treatment has an important influence on the appearance and quality of aluminum alloy workpieces. In order to form a sandy surface on the aluminum alloy workpiece, the existing aluminum alloy surface pretreatment methods mainly include alkali etching and acid etching. The main disadvantage of alkali etching is that the amount of corrosion to aluminum alloy is large (the corrosion amount of metal by the general alkali etching method is 7%), which causes a waste of resources and increases the production cost. The main disadvantage of acid etching is that the use of ammonium bifluoride and other agents will release toxic hydrogen fluoride gas and d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F1/20C23F1/36
CPCC23F1/20C23F1/36
Inventor 韩家伟裴星亮朱萍
Owner SHENZHENSHI YUZHAN PRECISION TECH CO LTD
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