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Stainless steel mesh has a unique strength, high wear resistance, excellent corrosion resistance and easy to rust and other excellent features. It is widely used in the chemical industry, food machinery, electrical and mechanical industry, environmental protection industry, household appliances industry and home decoration, finishing industry, to give people a gorgeous noble feeling. Stainless steel application development prospects will be more and more widely, but the development of stainless steel applications to a large extent determine the extent of its surface treatment technology development.

Commonly used stainless steel mesh surface treatment technology has the following several treatment methods: ① surface color whitening treatment; ② surface mirror bright processing; ③ surface coloring.

① surface color whitening treatment: stainless steel in the processing process, after the coil, bar edge, welding or artificial surface roasted heating treatment, resulting in black oxide. This hard gray-black oxide is mainly NiCr2O4 and NiF two kinds of EO4 ingredients, before the general use of hydrofluoric acid and nitric acid for strong corrosion method to remove. But this method cost, pollution of the environment, harmful to humans, corrosive, and gradually be eliminated. At present, there are two main ways to treat oxide scale:

1, sandblasting (pill) method: the main method is to spray micro-glass beads, remove the surface of the black oxide.

2, chemical method: the use of a non-polluting pickling passivation paste and non-toxic at room temperature with inorganic additives cleaning solution for immersion. So as to achieve the purpose of stainless steel whitening treatment. After dealing with the basic look is a matte color. This method is applicable to large, complex products.

② stainless steel surface mirror bright treatment methods: According to the complexity of stainless steel products and user requirements can be different mechanical polishing, chemical polishing, electrochemical polishing and other methods to achieve specular gloss. The advantages and disadvantages of these three methods are as follows:

1, the surface coloring: stainless steel coloring not only to give a variety of stainless steel products, increase the product variety, but also improve the product wear resistance and corrosion resistance.

③ . Stainless steel coloring methods are as follows: 1, chemical oxidation coloring method; 2, electrochemical oxidation coloring method; 3, ion deposition oxide coloring; 4, temperature oxidation coloring; 5, phase cracking coloring method. A brief overview of the various methods is as follows:

1, learn oxidation coloring method: that is, in a specific solution, through the chemical oxidation of the film to form the color, there are dichromate method, mixed sodium salt method, vulcanization method, acid oxidation and alkaline oxidation. General "Yin Ke Law" (INCO) use more, but in order to ensure that a group of products consistent with the color, you must use the reference electrode to control.

2, chemical coloring method: in a particular solution, by electrochemical oxidation of the film to form the color.

3, sub-deposition oxide coloring method Chemical method: the stainless steel workpiece is placed in a vacuum coating machine for vacuum evaporation plating. For example: titanium plated watch case, watch belt, usually golden yellow. This method is suitable for large quantities of product processing. Because of the large investment, high cost, small batch products are not cost-effective.

4, the temperature oxidation coloring method: in a particular molten salt, immersed in the workpiece to maintain a certain process parameters, so that the workpiece to form a certain thickness of the oxide film, and showing a variety of different colors.

5, phase cracking coloring method: more complex, less in the industry.

Stainless steel treatment methods should be selected according to the product structure, material, and the different requirements of the surface, choose the appropriate method for processing.


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