Where does colored stainless steel come from？

Stainless steel is favored by people for its "corrosion resistance, durability, ecological environmental protection", but its cold and monotonous color greatly limits its application field. Colorful stainless steel came into being. It not only retains the physical, chemical and mechanical properties of the primary color stainless steel, but also has bright, long-lasting colors. Its appearance meets the modern society people's demand for color diversity, and its application is more and more extensive.

1. The origin of colored stainless steel.

Color stainless steel is not painted or sprayed on steel, nor is it dyed with dye like color aluminum. Colored stainless steel itself is colorless, and the color is obtained because the surface has a layer of colorless transparent dense oxide film. When light strikes a film, both the reflected and refracted light passing through the film are the result of light interference. Color The color of stainless steel surface depends on the chemical composition, structure, finish, film thickness and incident light of the surface oxide film.

2 color stainless steel is divided into the following types:.

(1) chemical oxidation coloring method: in a specific solution, the color of the film is formed by chemical oxidation, including dichromate method, mixed sodium salt method, vulcanization method, acid oxidation method and alkali oxidation method. The "Inco method" is commonly used, but if a batch of products is to be consistent in color, it must be controlled by reference electrodes.

(2) electrochemical oxidation coloring method: the color of the film layer is formed by electrochemical oxidation in a specific solution.

(3) ion deposition oxidation coloring method: the stainless steel workpiece is placed in the vacuum coating machine for vacuum evaporation. For example: titanium-plated watch cases and bands are usually gold. This method is suitable for mass product processing. Because of the large investment and high cost, small batch products are not cost-effective.

(4) High temperature oxidation coloring method: in a specific molten salt, the workpiece is immersed in a certain process parameters, so that the workpiece form a certain thickness of oxide film, and show a variety of colors.

(5) Gas phase pyrolysis color development method: relatively complex, few industrial applications.

3. The application of colored stainless steel.

Color stainless steel because of its gorgeous color, gradually become a very good decorative material, its decoration shows elegant and luxurious quality. And, color stainless steel than ordinary stainless steel has better salt spray corrosion resistance, salt spray corrosion resistance for more than 10 years. Its colored surface can withstand high temperature of 200°C, and can resist ultraviolet radiation for more than 30 years without discoloration.

Color stainless steel is a kind of environmental protection decorative material, does not contain methanol and other organic substances, no radiation, anticorrosive durable, a wide range of applications. At present, it is mainly used for decoration of external walls and window frames of buildings, such as large architectural decoration (bus station, railway station, subway station, airport, etc.), hotel and building business decoration, public facilities, and new home decoration. In the field of arts and crafts, the combination of colored stainless steel with printing, etching, polishing, stippling and other methods can produce three-dimensional relief murals and hanging screens that will never fade. It can also be used in elevators, hardware appliances, kitchen and bathroom appliances, cabinets, advertising signs, daily necessities, etc., which can greatly increase the added value of products and has obvious competitive advantages in the market.