Surface coloring treatment in stainless steel fabrication: stainless steel coloring not only gives various colors to stainless steel fabrication products, increases the variety of products, but also improves the wear resistance and corrosion resistance of the products.
The stainless steel coloring methods in stainless steel fabrication are as follows: (1) chemical oxidation coloring method; (2) electrochemical oxidation coloring method; (3) ion deposition oxide coloring method; (4) high temperature oxidation coloring method; (5) gas phase cracking coloring method. A brief overview of the various methods is as follows:
(1)The chemical oxidation coloring method is a color of a film formed by chemical oxidation in a specific solution, and is a dichromate method, a mixed sodium salt method, a vulcanization method, an acidic oxidation method, and an alkaline oxidation method. In general, "Inco" (INCO) is used more, but to ensure that a batch of products have the same color, it must be controlled with a reference electrode.
(2)Electrochemical coloring: is the color of a film formed by electrochemical oxidation in a specific solution.
(3)Ion-deposited oxide coloring method: The stainless steel fabrication workpiece is placed in a vacuum coater for vacuum evaporation. For example: titanium-plated watch case, watch band, usually golden yellow. This method is suitable for processing large quantities of products. Because of the large investment and high cost, small batch products are not worthwhile.
(4)High-temperature oxidation coloring method: in a specific molten salt, immersed in the stainless steel fabrication workpiece to maintain a certain process parameters, so that the workpiece forms a certain thickness of oxide film, and presents a variety of different colors.
(5)Gas phase cracking coloring method: more complicated, less applied in industry.
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