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What is the corrosion resistance of Aluminum alloy trunking in different environments?

Publish Time: 2024-04-10
Aluminum alloy trunking is a widely used trunking product, and its corrosion resistance has different performances in different environments. The surface of aluminum alloys is usually oxidized to form an oxide film. This film can resist corrosion to a certain extent and gives the wire duct a certain degree of corrosion resistance. However, the degree of corrosion resistance can be affected by a variety of environmental factors.

In dry atmosphere, Aluminum alloy trunking has better corrosion resistance. This is because in a dry environment, the passivation film on the surface of the aluminum alloy is not easily damaged and can maintain its stability. However, the corrosion resistance of Aluminum alloy trunking will be affected when exposed to the outdoor atmospheric environment for a long time, especially in coastal areas or areas with heavy industrial pollution. Dust ions deposited on the surface and rainwater containing chemical substances will form an oxygen-deficient zone in the water film under the dust ions, causing damage to the passivation film and a decrease in self-passivation ability, and then local pitting corrosion.

In the industrial atmosphere, the protective film of Aluminum alloy trunking is also susceptible to damage. Especially in areas polluted by sulfur oxides and acid rain, its corrosion resistance will be significantly reduced. In addition, aluminum alloys also exhibit a relatively unstable passivation state in seawater. The chloride ions in seawater have a strong destructive effect on the passivation film and can easily lead to local corrosion, such as pitting corrosion and crevice corrosion.

However, it is worth noting that although the corrosion resistance of Aluminum alloy trunking is not as good as stainless steel, it can still show good performance in many general indoor environments and less harsh outdoor environments. Its advantages include lightweight, excellent thermal conductivity, green environmental protection and beautiful appearance. In locations where large amounts of heavy objects or external loads are required, or in particularly harsh environments, stainless steel trunking may be more suitable.

Therefore, when selecting Aluminum alloy trunking, it is necessary to comprehensively consider its corrosion resistance and the characteristics of the use environment. In more corrosive environments, additional protective measures may be necessary, such as adding coatings or using more corrosion-resistant materials, to extend the service life of aluminum alloy trunking. At the same time, regular maintenance and inspection are also key to ensuring that Aluminum alloy trunking remains in good working condition.
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