The common surface treatment methods of sheet metal are: drawing, sandblasting, baking, dusting, electroplating, anodizing, silk screen printing.

Since some sheet metal materials do not have the ability to resist rust and corrosion, effective surface treatment is necessary. Surface treatment of sheet metal parts can increase the life of the product in harsh environments or to achieve specific surface effects or functions.

1, drawing

The so-called sheet metal drawing is to put the material between the upper and lower boring wheels of the wire drawing machine. The belt is attached with the abrasive belt, which is driven by the motor to let the material pass through the upper and lower abrasive belts to pull out traces on the surface of the material. Different, the trace thickness is not the same, the main role is to beautify the appearance, generally aluminum is considered to be brushed surface treatment.

In addition, drawing is also called rubbing!

2, sandblasting

The sand is hit by the wind of the sand blasting machine to form a dense pit on the surface of the workpiece. The main function is to remove the dirt on the surface of the workpiece and increase the adhesion of the surface of the workpiece to prepare for the subsequent surface treatment.

3, baking paint, dusting

The most well-known is the paint of the car.

Spraying, high-temperature baking, etc., spraying a layer of paint of various colors on the surface of the material to beautify the appearance and increase the corrosion resistance of the material is a commonly used surface treatment method. There are generally two kinds of liquid baking varnish and powder baking varnish. Among them, powder baking varnish is the most common, the lacquer surface is non-conductive, and areas with EMC requirements are not allowed to be painted.

Main technical indicators: color difference, film thickness and gloss.

4, plating

By chemical reaction, a layer of other metal is attached to the surface of the material to increase the corrosion resistance of the metal, and to achieve a certain appearance, it is a commonly used surface treatment method, such as: electro-galvanizing, electroplating nickel, and the like.
Mainly plated with multi-colored zinc, blue and white zinc, black zinc, chrome plating.

5, anodizing

The metal on the surface of the workpiece is oxidized to form a dense protective film on the surface of the workpiece, which increases the corrosion resistance of the workpiece, generally in the form of chemical oxidation and anodization. It is a commonly used surface treatment method, usually with primary color anodizing and black anodizing.

6, silk screen

The process of marking various marks on the surface of the material generally has two methods: flat screen printing and pad printing. The main principle is the same as the camera film imaging principle. It is also an exposure process. The flat screen printing is mainly used on the general plane, but if it is encountered Where there are deep pits, pad printing is required.

Usually used in trademarks, use signs, warning signs, etc.

In summary, we can see that although the use of sheet metal is common. However, with proper surface treatment, many patterns can be changed. At the same time, it functions as a beautiful layer and a protective layer.