Stainless steel has unique strength, high wear resistance, superior anti-corrosion performance and not easy to rust and other excellent characteristics.

Therefore, it is widely used in chemical industry, food machinery, mechanical and electrical industry, environmental protection industry, home appliance industry and home decoration, fine decoration industry, giving people a sense of luxuriant and noble.

The application of stainless steel will be more and more extensive, but the application of stainless steel development largely determines the development of its surface treatment technology.

Double stainless steel you often use stainless steel mesh surface treatment technology has the following treatment methods: surface natural bleaching treatment;

(2) surface mirror bright treatment;

(3) surface coloring treatment.

1. Surface natural bleaching treatment: stainless steel in the processing process, through the roll plate, tying, welding or artificial surface fire roasting heating treatment, produce black oxide skin.

This hard grey-black oxide is mainly composed of two EO4 components, NiCr2O4 and NiF, which were previously removed by strong corrosion with hydrofluoric acid and nitric acid.

But this method costs a lot, pollutes the environment, is harmful to human body, is corrosive, and is gradually eliminated.

At present, there are two main treatment methods for oxide skin:

1. Sandblast (shot) method: mainly adopts the method of spraying glass beads to remove the black oxide skin on the surface.

2, chemical method: use a pollution-free acid cleaning passivation paste and no toxic room temperature with inorganic additives for immersion.

In order to achieve the stainless steel natural bleaching treatment.

It basically looks like a matte color when it's done.

This method is suitable for large and complex products.

(2) the surface of stainless steel mirror brightness treatment method: according to the complexity of the stainless steel products and different user requirements can be used respectively mechanical polishing, chemical polishing, electrochemical polishing and other methods to achieve mirror luster.

The advantages and disadvantages of these three methods are as follows:

1, surface coloring treatment: stainless steel coloring not only gives stainless steel products a variety of colors, increase the variety of products, but also improve the wear resistance and corrosion resistance.

3. Stainless steel coloring methods are as follows: 1, chemical oxidation coloring;

2. Electrochemical oxidation coloring method;

3. Ion deposition oxide staining method;

4. Warm oxidation coloring method;

5. Phase cracking and coloring method.

The methods are summarized as follows:

1, learn oxidation coloring method: is in a particular solution, through chemical oxidation to form the color of the film, there are dichromate method, mixed sodium salt method, sulfurization method, acid oxidation method and alkaline oxidation method.

In general, INCO is used a lot, but to ensure the same color in a batch of products, it must be controlled with reference electrodes.

2. Chemical coloring method: it is the color of the film formed by electrochemical oxidation in a specific solution.

3, son deposition oxide coloring chemical method: is the stainless steel workpiece in a vacuum plating machine for evaporation.

For example: titanium plated case, watch strap, is generally gold.

This method is suitable for mass production.

Because the investment is big, the cost is high, the small batch product is not economical.

4, warm oxidation coloring method: is in a specific molten salt, immersed in the workpiece to maintain a certain process parameters, so that the workpiece formed a certain thickness of oxide film, and show a variety of colors.

5. Phase cracking and coloring method: it is relatively complex and seldom used in industry.

The treatment method of stainless steel should be selected according to the product structure, material, and different requirements on the surface, choose the appropriate method for treatment.