Why Is Extruded Aluminum Enclosure Need To Be Coated With Powder?

- Aug 16, 2018-

Why is extruded aluminum enclosure need to be coated with powder?


The extruded aluminum enclosure for electric have been widely used in building doors, windows,curtain walls and other products for many years,

because of their small proportion, easy processing and high mechanical strength. 

Aluminum is a relatively active light metal with silver and white luster. 

Its corrosion resistance has the following two characteristics:


The higher the purity is, the better the corrosion resistance is, 

it mainly because the pure aluminum acts with oxygen in the air, 

and it produces a very thin layer of dense natural oxide film on the surface of aluminum, which is faster and thicker than other metal oxide films, 

thus preventing the further corrosion of harmful gases and water in the air and playing a protective role.


The extruded aluminum enclosure have high mechanical strength but low corrosion resistance. 

Pure aluminium has good corrosion resistance, 

but poor mechanical strength, which restricts its application to a certain extent. 

Therefore,various types of aluminium alloys are made by adding appropriate amounts of magnesium, copper, zinc and other metals into aluminium, 

which greatly improves its mechanical strength and enlarges its application range, 

but its corrosion resistance is worse than that of pure aluminium,

as it may be corroded by oxidation. 

This requires powder coating to protect it.


In addition to high corrosion resistance, extruded aluminum enclosure with powder coated also have many advantages, 

such as color diversification, good surface texture, and so on, 

which correspond to various colors of building exterior wall paints to adapt to different building styles.



Shenzhen Hongfashunda Mould Co., Ltd specializes in the production of aluminum enclosure,heat sink aluminum case,waterproof plastic electronic box,sheet metal plates enclosures with the fastest speed, 

the most reasonable price, to provide customers with the best products.