Stainless steel has unique strength, high wear resistance, superior corrosion resistance and not easy to rust and other excellent characteristics. Therefore, it is widely used in chemical industry, food machinery, electromechanical industry, environmental protection industry, household appliances industry and home decoration, fine decoration industry, giving people a magnificent and noble feeling. The application and development prospects of stainless steel will be more and more widely, but the application and development of stainless steel largely determines the degree of development of its surface treatment technology.
The following are some common surface treatments :
Mirror surface: The outer layer of stainless steel polishing, can be divided into physical and chemical two methods, but also in the surface layer to do local polishing. So that it can make stainless steel become more simple and lofty. There are 4K, 6K,8K,12K, especially 8K mirror more customers choose it.
The method used is mainly acid bath oxidation coloring method, so that the surface of stainless steel sandblasting board to generate a layer of transparent chromium oxide film, the light shining on the above, will be different because of the film thickness and different colors. The whole process of stainless steel sandblasting plate color processing includes coloring and hard film processing two steps. The coloring process is carried out in hot chromium-sulfuric acid solution tanks, where stainless steel sandblasted plates are dipped to create an oxide film on the surface one hundredth the diameter of a human hair. With the extension of time and the increase of oxide film thickness, the surface color of stainless steel sandblasting plate is changing.
Stainless steel coloring not only gives stainless steel products a variety of colors, increase the product color variety, and improve the wear resistance and corrosion resistance of products.Ways of coating stainless steel:
(1)Chemical oxidation coloring method: is in a specific solution, the color of the film formed by chemical oxidation, dichromate method, mixed sodium salt method, sulfide method, acid oxidation method and alkaline oxidation method. INCO is commonly used, but reference electrodes must be used to ensure a uniform color across a batch of products. The electrochemical coloring method: is in a specific solution, through electrochemical oxidation to form the color of the film.
(2) ion deposition oxide coloring chemical method: is the stainless steel workpiece in the vacuum coating machine for vacuum evaporation plating. For example: titanium plated case, watch strap, is generally golden yellow. This method is suitable for processing large quantities of products. Because investment is big, cost is high, small batch product is uneconomical.
(3) High temperature oxidation coloring method: is in a specific molten salt, immersed in the workpiece to maintain a certain process parameters, so that the workpiece forms a certain thickness of the oxide film, and presents a variety of color. Gas phase cracking coloring method: more complex, less application in industry
Stainless steel hairline is very particular about procedures and technology, generally with the wire drawing machine to repair and restore the product scratch position and weld, and finally achieve the overall artistic effect of wire drawing. It is the most popular surface of stainless steel today.
Stainless steel etching plate is in the stainless steel surface through chemical methods, etching out a variety of patterns.It used in elevator.
Others surface treatment
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