Sheet metal processing surface treatment dipping process
Metal dipping is a new type of technical treatment process for anti-corrosion of metal surfaces. Dipping is a heating process. The metal is preheated, dipped, and solidified. During dipping, the heated metal sticks to the surrounding materials. The hotter the metal, the longer the dipping time and the thicker the material.
10. Commonly used stainless steel surface treatment process
Wire drawing, polishing: According to the complexity of stainless steel products and the different requirements of users, mechanical polishing, chemical polishing, electrochemical polishing and other methods can be used to achieve mirror gloss.
Sandblasting, scratching, and whitening treatment: In the process of processing, stainless steel undergoes coiling, binding, welding, or artificial surface fire-roasting and heating treatment to produce black oxide skin. This hard gray-black oxide scale is mainly composed of NiCr2O4 and NiF, two EO4 components. In the past, hydrofluoric acid and nitric acid were generally used for strong corrosion to remove. However, this method is costly, pollutes the environment, is harmful to the human body, and is highly corrosive, and is gradually eliminated.
At present, there are two main methods for treating oxide scale:
⑴Sandblasting (pill) method: mainly adopts the method of spraying micro glass beads to remove the black oxide scale on the surface.
⑵Chemical method: Use a non-polluting pickling passivation paste and a non-toxic cleaning solution with inorganic additives at room temperature for immersion. So as to achieve the purpose of whitening the natural color of stainless steel. After processing, it basically looks like a dull color. This method is more suitable for large and complex products.
Coloring methods: (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 pyrolysis coloring method.
Other surface treatment methods, such as baking varnish, enamel, etc., are not commonly used for cabinet sheet metal processing products.