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Whether the industrial aluminum profile has electrical conductivity

As a light metal alloy, aluminum alloys incorporate magnesium, silicon or other metal elements. Aluminum itself is conductive, and its conductivity ranks fourth among metals, and its conductivity is still good. Some people say that industrial aluminum profiles are not conductive due to the addition of alloying elements to aluminum. In fact, this statement is wrong. Although alloying elements are added to aluminum alloys, most of them are still aluminum, which has little effect on electrical conductivity.

So the industrial aluminum profiles we usually use are non-conductive. What is the reason? This is because the surface of the industrial aluminum profiles we usually use is generally anodized. Anodizing forms a dense oxide film on the surface of the aluminum profile. Because aluminum oxide is non-conductive, the aluminum profile wrapped by aluminum oxide also becomes an insulator.

Some people have to say that aluminum alloys can form a natural oxide film on the surface even in the air. Why is there no anodized aluminum profile that conducts electricity? In fact, the naturally formed oxide film is very thin, and the film thickness is not uniform, so it cannot function as insulation. There are also chemically oxidized aluminum profiles, with a film thickness of only 3~5μ, which is also conductive. If there is a requirement for electrical conductivity of the material, chemical oxidation can be used if it is necessary to prevent corrosion.

industrial aluminum profile


Post time: Apr-29-2022