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removing mill scale from steel plate,What is Mill Scale on Steel Plate? Mill scale is a thin layer that forms on the surface of steel plates during the manuf

What is Mill Scale on Steel Plate?

Mill scale is a thin layer that forms on the surface of steel plates during the manufacturing process. It is mainly composed of iron oxides. When steel is hot - rolled, the high temperature causes the surface to react with oxygen in the air, resulting in the formation of this scale. It can be a bit of a nuisance as it can affect the appearance and sometimes the performance of the steel plate if not properly dealt with.

Why Remove Mill Scale from Steel Plate?

There are several reasons for removing mill scale from steel plates. Firstly, for aesthetic purposes. If you are using the steel plate for something visible, like in architecture or furniture making, the presence of mill scale might make it look less appealing. Secondly, from a functional point of view, mill scale can interfere with processes such as painting or welding. For example, when welding, the mill scale can cause inclusions in the weld, reducing its strength. Also, if you want to paint the steel plate, the mill scale can prevent the paint from adhering properly, leading to peeling or a less durable finish.

Methods of Removing Mill Scale from Steel Plate

One common method is mechanical removal. This can include using tools like wire brushes or sandblasting. Wire brushing is a relatively simple and inexpensive way. You can use a handheld wire brush for small steel plates or a power - operated wire brush for larger ones. Sandblasting, on the other hand, is more effective for larger areas and can provide a more uniform removal. Another method is chemical removal. There are various chemical solutions available that can dissolve the mill scale. However, this method requires careful handling as the chemicals can be hazardous. After chemical treatment, the steel plate usually needs to be thoroughly rinsed to remove any remaining chemical residue.

Questions and Answers

Question: What are the common tools for mechanically removing mill scale from steel plate?Answer: The common tools for mechanically removing mill scale from steel plate are wire brushes and for sandblasting equipment. Wire brushes can be handheld for small plates or power - operated for larger ones, and sandblasting is good for large areas.

Question: Why is chemical removal of mill scale from steel plate a bit tricky?Answer: Chemical removal of mill scale from steel plate is a bit tricky because the chemicals used can be hazardous. Also, after chemical treatment, the steel plate must be thoroughly rinsed to remove any remaining chemical residue.