Stainless steel gradient color treatment process

(1) High temperature oxidation coloring method It is immersed in a specific molten salt, and the stainless steel special-shaped tube is immersed under certain process parameters, so that the workpiece forms a certain thickness of oxide film, and presents various colors.

(2) 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 alkaline oxidation method. Generally, "Yinke method" is used more, but if you want to ensure the same color and luster of a batch of products, you must use a reference electrode to control

(3) Gas phase cracking coloring method This kind of coloring method of stainless steel special-shaped pipe is more complicated and is rarely used in industry.

(4) Ion deposition oxide coloring method The chemical method is to place the stainless steel special-shaped tube in a vacuum coating machine for vacuum evaporation coating. For example: titanium-plated watch cases and watch straps are generally golden yellow. This method is suitable for high-volume product processing.

(5) Vacuum electroplating uses the principle of physical vapor deposition for surface plating. It is carried out under high vacuum conditions and does not require rectifiers, plating tanks, plating solutions, etc.; electroplating uses the principle of electrolysis. It is the cathode, the metal to be plated is the anode, and direct current is applied to make the metal ions deposit as a coating on the plated parts