The development of industrial aluminum profiles is expected. For modern exhibition industry, metal products have become a part of life and an indispensable part of industrial production. The following small series will give you a brief introduction on what corrosion phenomena will occur when processing industrial aluminum profiles, so that you can have a certain understanding of what corrosion phenomena will occur when processing industrial aluminum profiles. 

Today, we will mainly introduce some phenomena that corrode industrial aluminum profiles.

1. Hole corrosion is a kind of local corrosion form that produces needle-point, point and hole on metal. An article made of aluminum and other alloying elements. Usually, it is made by processing it into castings, forgings, foils, plates, belts, tubes, bars and profiles, and then cold bending, sawing, drilling, assembling and coloring. The main metal element is aluminum, and some alloying elements are added to improve the performance of aluminum.

2. Galvanic corrosion: Galvanic corrosion is also a characteristic corrosion form of aluminum. The natural potential of aluminum is very negative. When aluminum is in contact with other Metal, aluminum is always at the anode to accelerate its corrosion.

3. crevice corrosion: crevice corrosion is accelerated due to the action of differential inflatable batteries, but it has no effect outside the crevice.

4. Intergranular corrosion: Intergranular corrosion means that pure aluminum does not flourish, and the cause of intergranular corrosion is related to improper heat treatment. Alloying elements or intermetallic compounds precipitate along grain boundaries, which constitutes a corrosive battery as opposed to grains, causing accelerated intergranular corrosion.

The selection of corrosion resistance of industrial aluminum profiles needs to be considered emphatically.

When selecting materials for industrial use, we need to consider in many aspects whether they meet the requirements of production and use. When we choose Wuxi industrial aluminum profile, we need to consider its strength, hardness and corrosion resistance. Select materials according to the occasions where the materials may be used.

Selection factors of industrial aluminum profiles:

1. Strength: Strength is an important factor that must be considered in product design. When it is an aluminum alloy component, the appropriate alloy should be selected according to the pressure it bears. The strength of pure aluminum is low, while the heat-treated alloys of series 2 and 7 are high, and the hardness and strength have a certain relationship.

2. Hardness: Many customers are very concerned when buying aluminum, and the priority of hardness is directly related to the chemical composition of the alloy. Secondly, different states also have great influence. From the point of hardness that can be achieved, 7 series, 2 series, 4 series, 6 series, 5 series, 3 series and 1 series decrease in turn.

3. Corrosion resistance: Corrosion resistance includes chemical corrosion and stress corrosion resistance. Generally speaking, the corrosion resistance of series 1 pure aluminum is very good, series 5 is good, followed by series 3 and 6, and series 2 and 7 are poor.

The selection principle of corrosion resistance should be determined according to its application occasion. When high-strength alloy is used in corrosive environment, all kinds of composite materials for corrosion protection must be used.

4. Weldability: Most aluminum alloys have no problem in welding, especially some 5 series aluminum alloys, which are specially designed for welding. Relatively speaking, some 2 series and 7 series aluminum alloys are difficult to weld.

5. Decorative performance: When aluminum is used for decoration or some specific occasions, its surface needs anodizing and painting to obtain the corresponding color and surface texture. At this time, its decoration should be considered emphatically. Generally speaking, materials with good corrosion resistance have excellent anodizing performance, surface treatment performance and painting performance.

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