Why does Aluminum Extrusion do surface treatment?
Aluminum is a silver-white luster of light metal, its corrosion resistance has the following two characteristics:
1, the higher the purity, the better the corrosion resistance, we all know, pure aluminum in the air and the role of oxygen in the aluminum surface will produce a layer of thin dense natural oxide film, faster than other metal oxide film Thick and more, thus preventing the air harmful gases and moisture corrosion, played a protective role;
2, pure aluminum corrosion resistance is good, but the mechanical strength is poor, which to some extent restricted the application of aluminum, so people in the aluminum by adding the right amount of magnesium, copper, zinc and other metals, made of various types Of the aluminum alloy, aluminum alloy mechanical strength is high, so that the mechanical strength of aluminum greatly improved, greatly expanded the scope of application, although the mechanical strength of aluminum alloy, but the corrosion resistance than pure aluminum, so there may be corrosion due to oxidation. This requires the powder coating to protect the aluminum alloy profiles, aluminum alloy with its small proportion, easy processing, mechanical strength and other characteristics over the years widely used in building doors and windows, curtain wall and other products.
After surface treatment, Aluminum Extrusion has a high corrosion resistance, color diversification, good surface texture and many other advantages, with different architectural exterior paint echoes to build a colorful building.
One, industrial Aluminum Extrusion in the extrusion process, such as extrusion die is not very good or die extrusion industrial Aluminum Extrusion too much, industrial Aluminum Extrusion appearance will occur squeeze marks, hand may touch the industrial Aluminum Extrusion Appearance uneven, in order to make the appearance of industrial Aluminum Extrusion smooth, not touching indentation marks, industrial Aluminum Extrusion plant generally first with alkaline water erosion, erosion out squeeze marks.
Second, the industrial Aluminum Extrusion as the outer parts of the requirements of good sealing, the current powder electrostatic spraying has become the domestic industrial Aluminum Extrusion coating in the popular. In particular, the glass industry, Aluminum Extrusion area of its opening requirements should not be greater than the curtain wall area of 15%: and open the department should adopt the suspension structure, opening angle should not be greater than 45 degrees.
Third, the industrial Aluminum Extrusion powder coating combined with thermal transfer technology will make it more fashionable, so that the powder coating of the profile device has a greater room for development.
Fourth, the aluminum alloy with high strength, light weight, not strong, strong resistance to erosion, good plasticity, deformation is small, non-polluting, non-toxic, fire strong, long life (up to 50-100 years) Good recovery, can be re-furnace re-refining. China's industrial Aluminum Extrusion industry known as the sun industry, after nearly 50 years of development, since 2002, the output has been ranked first in the world. Sandblasting technology is a common method of industrial Aluminum Extrusion in recent years, with a special sand high-speed jet wear off the industrial Aluminum Extrusion surface extrusion marks.