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How are Aluminum Die Casting Products surface treated and processed

(Summary description)Aluminum Die Casting Products is a precision casting method that uses high pressure to force metal melt into a metal mold with complex shapes. It is a precision casting method.

How are Aluminum Die Casting Products surface treated and processed

(Summary description)Aluminum Die Casting Products is a precision casting method that uses high pressure to force metal melt into a metal mold with complex shapes. It is a precision casting method.

Aluminum Die Casting Products is a precision casting method that uses high pressure to force metal melt into a metal mold with complex shapes. It is a precision casting method.

Aluminum Die Casting Products
Aluminum Die Casting Products have many post-processing processes, mainly the following:
1. Sandblasting is mainly used for surface cleaning. Sandblasting before painting (painting or plastic spraying) can increase the surface roughness and contribute to the improvement of adhesion, but the contribution is limited, and it is not as good as chemical coating pretreatment.
2. Passivation is a method of converting the metal surface into a state that is not easily oxidized, and delaying the corrosion rate of the metal.
3. Coloring: There are two main processes for coloring aluminum: one is aluminum oxidation coloring process, and the other is aluminum electrophoresis coloring process, which forms various colors on the oxide film to meet certain use requirements, such as Optical instrument parts are often black, and medals are gold.
Conductive Oxidation (Chromate Conversion Coating) - Used where both protection and conductivity are required.
4. Chemical polishing Chemical polishing is a chemical processing method that uses the selective self-dissolution of aluminum and aluminum alloys in acidic or alkaline electrolyte solutions to level and polish the surface to reduce its surface roughness and PH.
This polishing method has the advantages of simple equipment, no power supply, no restrictions on the size of the workpiece, high polishing speed and low processing cost. The purity of aluminum and aluminum alloys has a great influence on the quality of chemical polishing. The higher the purity, the better the polishing quality, and vice versa.
5. Chemical oxidation: The oxide film is thin, with a thickness of about 0.5 to 4 microns, and is porous, soft, and has good adsorption properties. It can be used as the bottom layer of organic coatings, but its wear resistance and corrosion resistance are not as good as anodes. Oxide film;
The process of chemical oxidation of aluminum and aluminum alloys can be divided into two categories: alkaline oxidation and acid oxidation according to their solution properties.
According to the film properties, it can be divided into: oxide film, phosphate film, chromate film, chromate-phosphate film.
6. Spraying: used for external protection and decoration of equipment, usually on the basis of oxidation. Aluminum parts should be pre-treated before coating to make the coating and the workpiece firmly bonded. Generally, there are three methods: phosphating (phosphate method), chromating (chromium-free), and chemical oxidation.
7. Electrochemical oxidation, the chemical oxidation treatment equipment of Aluminum Die Casting Products is simple, easy to operate, high production efficiency, does not consume electricity, has a wide range of applications, and is not limited by the size and shape of parts. The thickness of the oxide film is about 5 to 20 microns (the thickness of the hard anodized film can reach 60 to 200 microns), which has high hardness, good heat resistance and insulation, and has higher corrosion resistance than chemical oxide films. adsorption capacity.

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Ningbo Beilun Jiawei Machinery Co.,Ltd

Add: No.600,Fuchunjiang Rd,Beilun,Ningbo,China 315800

 

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© 2020  Ningbo Beilun Jiawei Machinery Co.,Ltd  All rights reserved. 

浙ICP备12006818号 

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