Dec 09, 2022

Corrosion type of industrial aluminum profiles

Industrial aluminum profiles are widely used because of their superior performance, but in fact, industrial aluminum profiles are also subject to corrosion.

  • Filamentous erosion: It is a kind of under film erosion, which is related to the alloy cost and service environment of industrial aluminum profiles.

  • Pitting: It occurs on the alloy surface in the form of pitting corrosion. Industrial aluminum profiles with high copper content are prone to pitting corrosion, while ordinary aluminum profiles are more difficult to pitting corrosion.

  • Galvanic corrosion: also known as bimetallic corrosion, which is mainly determined by the relative position of metal in the potential sequence. The greater the potential difference between them, the more serious the galvanic corrosion. All industrial aluminum profiles are inevitably subjected to galvanic corrosion.

  • Crack erosion: cracks may occur when industrial aluminum profiles are extruded. As time goes on, these cracks will be eroded and affect the performance of aluminum profiles.

  • Intercrystalline corrosion: the raw material of industrial aluminum is 100% pure aluminum and other metal elements in a certain proportion. The addition of aluminum is not pure aluminum production, and improper heat treatment of aluminum profiles is easy to cause intergranular corrosion.

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