1、 Anodizing

Mainly the anodization of aluminum, which utilizes electrochemical principles to generate a layer of Al2O3 (aluminum oxide) film on the surface of aluminum and aluminum alloys. This oxide film has special characteristics such as protection, decoration, insulation, and wear resistance.

Process flow:

Monochrome, Gradient:

Polishing/sandblasting/wire drawing → degreasing → anodizing → neutralization → dyeing → sealing → drying

Dual color:

① Polishing/sandblasting/wire drawing → degreasing → masking → anodizing 1 → anodizing 2 → sealing → drying

② Polishing/sandblasting/wire drawing → degreasing → anodizing 1 → laser engraving → anodizing 2 → sealing → drying

Technical features:

1. Enhance strength

2. Implement any color except white

3. Realize nickel free sealing of holes, meeting the requirements of countries such as Europe and the United States for nickel free sealing

Technical difficulties and key improvement points:

The yield level of anodic oxidation is related to the cost of the final product. The key to improving the yield of oxidation is the appropriate amount of oxidant, temperature, and current density. This requires structural component manufacturers to continuously explore and seek breakthroughs in the production process.

2、 Electrophoresis

Used for stainless steel, aluminum alloy, etc., it can present various colors of products, maintain metallic luster, and enhance surface performance, with good anti-corrosion performance.

Process flow:

Pretreatment → Electrophoresis → Drying

Advantages:

1. Rich in color;

2. Non metallic texture, suitable for sandblasting, polishing, wire drawing, etc;

3. Processing in a liquid environment can achieve surface treatment of complex structures;

4. The process is mature and capable of mass production.

Disadvantages:

The ability to conceal defects is average, and electrophoretic treatment of die-casting parts requires high pre-treatment requirements.

3、 Micro arc oxidation

The process of applying high voltage in electrolyte solution (generally weak alkaline solution) to generate ceramic surface facial mask layer is the result of the synergistic effect of physical discharge and electrochemical oxidation.

Process flow:

Pretreatment → Hot water washing → MAO → Drying

Advantages:

1. Ceramic texture, dull appearance, no high gloss products, delicate touch, anti fingerprint;

2. Wide range of substrates: Al, Ti, Zn, Zr, Mg, Nb, and their alloys;

3. The pre-treatment is simple, and the product has excellent corrosion resistance, weather resistance, and heat dissipation performance.

Disadvantages:

At present, colors are limited, with only mature colors such as black and gray, making it difficult to achieve bright colors; The cost is mainly influenced by the high consumption of film, and it is one of the highest costs in surface treatment.

Dongguan Fuding Metal Co., Ltd

Tel: 0769-85627821

Fax: 0769-83352526

Mr. Hu: 13712216703

Q Q: 1245096259

Email: [email protected]

Website: hppt://www.zxh5566.cn