Common metal surface treatment process

Common metal surface treatment processes:

The surface of metal materials generally solves the technical problems. This paper introduces the surface treatment of stainless steel plate, aluminum alloy, die-casting aluminum, zinc alloy materials and other metal materials in detail: Dalian metal surface treatment

1、 Anodic oxidation

The whole process of taking aluminum or aluminum alloy products as anodic oxidation, placing the solution in the acidic and alkaline state to carry out plug-in electrolysis, and using the effect of electrolysis to produce aluminum oxide (Al2O3) plastic film on its surface is called anodic oxidation solution of aluminum and aluminum alloy. After anodic oxidation, many aluminum surfaces can be formed μ M -- dozens μ M air oxide film. Compared with the natural air oxide film of aluminum alloy, its corrosion resistance, wear resistance and decorative art are significantly improved.

Production process:

Solid color, color gradient:

Polishing/sand blasting/metal wire drawing → degreasing → anodizing → intermediate closing → coloring → hole sealing → air drying

Two colors:

① Polishing/sand blasting/metal wire drawing → degreasing → masking → anodizing 1 → anodizing 2 → hole sealing → air drying

② Polishing/sand blasting/metal wire drawing → degreasing → anodizing 1 → laser marking → anodizing 2 → hole sealing → air drying

Generally, the cost of dichroism is much higher, and it needs to be covered and oxidized twice in the air, so the rejection rate is relatively high.

2、 Electrophoretic principle

It is used for stainless steel plate, aluminum alloy, etc., which can make the goods show various colors, maintain the metal texture, improve the surface characteristics, and have good anti-corrosion properties.

Production process:

Pre solution → electrophoresis principle → air drying

Advantages:

1. Colorful colors;

2. No metallic luster, can be mutually matched with sandblasting, polishing, metal wire drawing, etc;

3. Production and processing in liquid natural environment can complete the surface solution of complicated structures;

4. The processing technology is perfect and can be mass produced.

3、 Electroplating process

The processing technology of using electrolysis method to make the surface of metal materials adhere to a layer of ceramic film, which has the advantages of avoiding erosion, improving wear resistance, conductivity, reflectivity and improving beauty.

Production process:

Front solution → cyanide free alkali copper → cyanide free white copper tin → ceramic coating