The simplest outline of metal plate processing is to process different materials of metals. In the process of metal plate processing, there is a certain requirement for metal materials. Not only the integrity of the metal plate is required, but also the metal appearance, such as whether the metal is over oxidation or not, while in the process of the metal plate, metals are not allowed to be oxidized. In addition, the thickness of the metal is required to exceed the thickness of treated goods; but in reality, there is hardly any metal that has not been oxidized, so how do we need to deal with the oxidized metal?
Stainless steel in processing operations is usually treated by rolling, welding, or heating through the artificial surface, to produce the black oxide coating. This kind of gray black oxide coating is strong and contains two kinds components of EO4, NiCr2O4 and NiF. In the past, it was basically eliminated by using hydrofluoric acid and nitric acid for strong corrosion. However, this method is gradually abandoned by the metal plate processing industry due to the pollution of the environment, the harm to human body, the large corrosiveness and the high cost. There are two kinds of solutions to deal with the oxide coating of sheet metal processing.
Stainless steel in processing operations is usually treated by rolling, welding, or heating through the artificial surface, to produce the black oxide coating. This kind of gray black oxide coating is strong and contains two kinds components of EO4, NiCr2O4 and NiF. In the past, it was basically eliminated by using hydrofluoric acid and nitric acid for strong corrosion. However, this method is gradually abandoned by the metal plate processing industry due to the pollution of the environment, the harm to human body, the large corrosiveness and the high cost. There are two kinds of solutions to deal with the oxide coating of sheet metal processing.
- By chemical method, we use a non-pollution pickling and passivation paste and harmless liquid in normal temperature and with inorganic additives to wash it. It achieves the purpose of albinism disposal of stainless steel itself. The metal equipment processed in this way looks like a dull color. This method is more suitable for large and promiscuous goods.
- Sandblasting/shot blasting: generally, we choose the way of spraying tiny glass beads to remove the black oxide coating.
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