How to use sheet metal processing to solve the oxidation problem?
Sheet metal processing is the key technology that sheet metal technical staff need to grasp, and it is also an important process of sheet metal forming. Sheet metal processing includes the traditional cutting and blanking, blanking processing, bending and pressing forming and other methods and process parameters, as well as various cold stamping die structures and process parameters, various equipment working principles and operation methods, as well as new stamping technology and new technology. Parts sheet metal processing is called sheet metal processing. In fact, we need to know that the metal surface is related to the sheet metal processing. Then how should we use sheet metal processing to solve the problem of oxide scale? Let's talk about it：
The stainless steel in the sheet metal processing operation is usually treated by rolling plate, binding edge, welding or heating by artificial surface fire, resulting in black oxide skin. This kind of gray black oxide scale is relatively strong. In the past, it was removed by using hydrofluoric acid and nitric acid for strong corrosion. However, this method is gradually abandoned by the cabinet sheet metal processing industry due to its environmental pollution, harmful to human body, high corrosivity and high cost. At present, there are two ways to deal with oxide scale in sheet metal processing plants
1. Through the chemical method: using a kind of pollution-free pickling passivation paste and room temperature non-toxic cleaning solution with inorganic additives. To achieve the white treatment intention of stainless steel nature. The metal equipment treated in this way appears to have a dull color. This method is more suitable for large and miscellaneous commodities
2. Sandblasting / shot peening: in general, the method of spraying glass beads is selected to remove the black oxide skin on the surface.
During the operation, stainless steel will generally be rolled, welded or heated, so that there will be black oxide skin. In the past, we usually used strong corrosion method to deal with it, but this method caused too much damage to the environment and our human body, so it was gradually replaced by other methods.
In fact, we can use pickling passivation paste and cleaning solution without additives to achieve the performance of stainless steel. This method is useful for large equipment, but it is also a chemical method.
