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High-silicon aluminum alloy die casting part anodic oxidation method

A high-silicon aluminum alloy, anodic oxidation technology, applied in the direction of anodic oxidation, electrolytic coating, surface reaction electrolytic coating, etc., can solve problems such as hanging dust, dark spots, etc., to avoid cost investment, improve process parameters and process sequence, The effect of uniform sand surface oxidation effect

Active Publication Date: 2019-06-21
安徽华淮新材料有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

Using the traditional oxidation process, the silicon element remains in the oxide film to form a matte gray film layer, with serious dust hanging on the surface, and even dark spots and other defects.

Method used

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  • High-silicon aluminum alloy die casting part anodic oxidation method
  • High-silicon aluminum alloy die casting part anodic oxidation method

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Embodiment 1

[0048] This embodiment relates to a method for anodizing high-silicon aluminum alloy die castings with ADC10 aluminum alloy die castings as the processing object, specifically including the following operations:

[0049] 1. Degreasing

[0050] Acidic degreasing can be used, the composition and concentration parameters of the bath solution are 5-15% sulfuric acid, 1-5% OP-10 emulsifier, soaking at 40-50°C for 3-10 minutes, and entering the next process after two washings. Sulfuric acid is used as the main component of the degreasing agent, the degreasing speed is fast, and it can be prepared by anodic oxidation waste sulfuric acid, which saves costs and reduces waste liquid discharge.

[0051] 2. Alkali corrosion

[0052] This step can improve the activity of the surface of the aluminum part, remove the dirt and oxides on the surface of the aluminum part, especially remove the release agent on the surface of the die-casting part by alkali etching, because the residual release ...

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Abstract

The invention provides a high-silicon aluminum alloy die casting part anodic oxidation method. The high-silicon aluminum alloy die casting part anodic oxidation method comprises the following steps ofdegreasing, alkali corrosion, silicon removing, neutralizing, sand blasting, magnetic force vibration polishing, anodic oxidation, ultrasonic wave cleaning, dying, hole sealing and hot water washing.Compared with the prior art, the high-silicon aluminum alloy die casting part anodic oxidation method has the following beneficial effects that firstly, basic steps of the method can be conducted byadopting existing equipment, extra cost investment is avoided, and through improving technological parameters and the working procedure sequence, each basic operation is recombined, and decorative anodic oxide film can be acquired from high-silicon aluminum alloy die casting parts; secondly, chemical agents of the technology are all common chemical raw materials; and thirdly, the pitch-dark, bright and uniform sand surface oxidation effect can be acquired on the surface of the high-silicon aluminum alloy die casting parts which are treated with the technology.

Description

technical field [0001] The invention relates to a high-silicon aluminum alloy die-casting anodic oxidation method, which belongs to the technical field of aluminum alloy material protection treatment. Background technique [0002] The high-silicon aluminum alloy die-casting material contains 7.5-12% silicon, as well as copper, iron, zinc, manganese, nickel, and tin elements. Silicon, in particular, is insoluble in acids and alkalis. Using the traditional oxidation process, the silicon element remains in the oxide film to form a matte gray film layer, and there are serious dust hanging on the surface, and even dark spots and other defects. Contents of the invention [0003] Aiming at the defects in the prior art, the object of the present invention is to provide a high silicon aluminum alloy die casting anodic oxidation method. [0004] The present invention is achieved through the following technical solutions: [0005] The invention provides a method for anodizing a hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/16C25D11/24C25D11/08
Inventor 熊伟孙道明
Owner 安徽华淮新材料有限公司
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