Aluminum is a very common metal material, which can also be used to make various handicrafts. It is also a common method to spray aluminum before use. What are the aluminum spraying construction processes? What are the precautions for this metal spraying construction? The hardware spraying will show you one by one.

1. What are the construction processes of aluminum spraying

Powder spraying construction technology and requirements for metal spraying The so-called powder electrostatic spraying is the principle of using high-voltage electrostatic corona electric field. The high-voltage negative pole is connected to the metal guide mark on the spray gun head, and the workpiece to be sprayed is grounded to form the positive pole, so that a strong electrostatic field is formed between the spray gun and the spray gun. Workpiece. When the compressed air is used as the carrier gas to deliver the powder coating from the powder supply cylinder through the powder feed pipe to the spray gun guide rod, the corona discharge generated by the guide rod is connected with the high-voltage negative pole, which generates dense negative charges near it, Make the powder negatively charged and enter the electrostatic field with high electric field strength. Under the dual action of electrostatic force and carrier gas, the powder uniformly flies to the surface of the grounded workpiece to form a thick and uniform powder layer, and then it is heated and solidified into a durable coating.

The coating construction process is divided into the following steps: pretreatment - drying and moisture removal - spraying - inspection - baking - inspection - finished product.

2. What are the construction precautions?

Because of its small proportion, easy processing and high mechanical strength, aluminum alloy has been widely used in building doors, windows, curtain walls and other products for many years. Aluminum is a relatively active light metal with silver white luster. Its corrosion resistance has two characteristics:

(1) The higher the purity, the better the corrosion resistance. This is mainly because pure aluminum interacts with oxygen in the air to produce a thin and dense natural oxide film on the aluminum surface, which is much faster and thicker than other metal oxide films, thus preventing harmful gases and moisture in the air. Further corrosion and protection.

(2) Aluminum alloy has high mechanical strength, but low corrosion resistance. Although pure aluminum has good corrosion resistance, its mechanical strength is poor, which limits the application of aluminum to a certain extent. Aluminum alloy greatly improves the mechanical strength of aluminum and greatly expands its application range, but its corrosion resistance is worse than that of pure aluminum, so it may be oxidized and corroded. This requires powder coating to protect aluminum alloy profiles.

In addition to strong corrosion resistance, powder coated aluminum profiles also have many advantages, such as good surface texture and various colors, which correspond to various colors of exterior wall coatings to adapt to different architectural styles.