Why does Aluminum need to be Oxidized?

2020-07-14 Yixin Precision Metal and Plastic Ltd

Why does aluminum need to be oxidized?

Why aluminum is often surface treated with oxidation? If you still don't know the reason, today YiXin takes you to understand the real reason of aluminum oxidation treatment.

1, aluminum itself is a very corrosion-resistant material, but in the encounter with oxygen will form alumina oxidation on the surface of aluminum, in a long time will slowly eliminate its corrosion resistance and resistance to bran. In addition, aluminum is very sensitive to acids. When acid is encountered, the surface layer of aluminum will be destroyed. Then we need to oxidize it again and add another layer to the surface to improve the corrosion resistance of the top layer.

2. After surface anodizing, the corrosion resistance, hardness, wears resistance, insulation and heat resistance of aluminum tubes or products are greatly improved. The outer layer of anodic oxidation film of aluminum is porous and easy to absorb dyes and colored materials, so it can be dyed and enhance its decorative effect. The corrosion resistance and wear resistance of oxide film can be further improved after being closed by hot water, high temperature steam or nickel salt.

Anodic oxidation of aluminum is widely used in surface treatment of aluminum products, and its industrial applications can be roughly divided into the following categories:

1. Prevent corrosion of products

The film obtained by anodic oxidation has good stability in the atmosphere due to proper sealing treatment. No matter from sulfuric acid solution, oxalic acid solution or chromic acid solution in the normal process of the oxidation film, its corrosion resistance is very good, such as daily aluminum pot, pot, washing machine tank. Chromic acid oxidation method is especially suitable for aluminum welding and riveting parts.

2. Protection - Decoration

Oxide film with high transparency, oxide film has can adsorb many organic dye or the characteristics of inorganic pigments, oxide film can be obtained on all sorts of bright color and design, combined with the emergence of many new technology in recent years such as oxidation coloring, fireworks pattern and wood grain, offset printing, transfer printing, ceramic oxide oxidation, etc., to make aluminum appearance more beautiful and pleasing to the eye, this layer of color film is adornment layer, and corrosion protective layer, such as lighters, the fountain and crafts.

3, as a hard ware layer

In sulfuric acid or oxalic acid solution can be by adjusting the anodic oxidation process conditions, obtain the thick and hard membrane layer, use of film hole and selective absorption performance to store oil, effectively applied to the working condition of friction condition, at the same time has the characteristics of lubrication and wear resistance, such as automobile and tractor engine cylinder, piston, etc.

YI Xin precision as a leader in this field, this a very professional in the aluminum processing, engineering team spent a lot of time to study different way of surface treatment, aluminum anodic oxidation, sand blasting, laser, etc., the different processing requirements of aluminum has its own unique technology and ideas, and we have a large number of professional processing equipment: CNC, milling machine, universal car, etc., and high precision measuring instruments could be high quality high speed to complete the customer's requirements, let every customer satisfaction.

How should CNC machining tool choose?

How to choose CNC machining tools? Today, Yi Xin show you to learn these a few moves, after the tools to pick!

1, coarse turning, should choose a high strength, good durability of the tool, to meet the rough turning back draft, feed large requirements.

2. High precision and good durability should be selected to ensure the machining accuracy.

3. In order to reduce the time of tool changing and facilitate tool matching, the tool holder and tool holder should be used as far as possible.

First, CNC machining fixture reasonable choice

1. Try to use general fixture to clamp the workpiece and avoid using special fixture;

2. Parts positioning datum coincide to reduce positioning error.

Second, determine the processing route

The machining route refers to the path and direction of the tool relative to the parts in the process of precision CNC lathe and CNC lathe.

1. Requirements for machining accuracy and surface roughness shall be ensured;

2, the processing route should be as short as possible, in order to reduce the idling time of the tool.

Third, processing route and processing allowance

In the case of CNC lathes not widely used, it is usually necessary to lay too much margin on the blank, especially in the ordinary lathe including forging and casting hard cortex margin. If you want to use CNC lathe processing, must pay attention to the flexible arrangement of the program.

Fourth, key points of fixture installation

At present, the connection between the hydraulic chuck and the hydraulic clamp cylinder is realized by pulling rod. The key points of clamping hydraulic chuck are: first, remove the nut on the hydraulic cylinder by hand, remove the tube, pull out from the back end of the spindle, then remove the fixing screw of the chuck by hand, and then remove the chuck.

Yi Xin precision as a leader in this field, we in the CNC processing this a very professional, engineering team spent a lot of time to study way of different materials on the CNC processing, rough machining of CNC machining technology finishing has its own unique technology and ideas, can high quality high speed to complete the customer's requirements, percentage let every customer satisfaction.

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  • Yixin Precision Metal and Plastic Ltd
  • Address:Shajing Road 211-3, Shatou Industrial Park, Shajing Street, Bao'an Distrist, Shenzhen(518104), China
  • Tel:86-0755-2756 6993
  • Phone:86-1893 8911 183