Common Issues with Standard Aluminium Extrusions and How to Fix Them

Aluminium extrusions are a common sight in many industries, from construction to automotive. However, like any other material, aluminium extrusions can also be subject to a number of common problems.

In this article, we will discuss some of the most common issues with standard aluminium extrusions and how to fix them.

Surface Defects

Surface defects are one of the most common problems with aluminium extrusions. These defects can range from minor scratches and dents to more serious problems such as pitting and corrosion.

The best way to fix surface defects is to prevent them from occurring in the first place. This can be done by taking care when handling and storing aluminium extrusions, and by using protective coatings to prevent damage. However, if surface defects do occur, they can be repaired using a variety of methods, such as sanding, polishing, and painting.

Dimensional Accuracy

Dimensional accuracy is another important consideration for aluminium extrusions. In some cases, even small deviations from the desired dimensions can cause problems with the fit and function of the extrusion.

To ensure dimensional accuracy, it is important to work with a reputable supplier who uses high-quality tooling and processes.

If dimensional accuracy is a critical concern, it may also be necessary to specify tighter tolerances on the extrusion drawings.

Mechanical Properties

The mechanical properties of aluminium extrusions are determined by the alloy composition and the heat treatment process.

The most common aluminium alloys used for extrusions are 6061 and 6063. These alloys offer a good balance of strength, toughness, and corrosion resistance.

However, if specific mechanical properties are required, it may be necessary to use a different alloy or heat treatment process.

Corrosion

Corrosion is a major concern for aluminium extrusions, especially in outdoor applications. Aluminium is a relatively reactive metal, and it is susceptible to attack by a variety of corrosive agents, such as moisture, salt, and acids.

To protect aluminium extrusions from corrosion, it is important to use a protective coating, such as anodising or painting.

In addition, it is also important to design extrusions to minimise the risk of water entrapment and corrosion-prone crevices.

Conclusion

Aluminium extrusions are a versatile and durable material, but they are not immune to problems. By understanding the common issues with aluminium extrusions and how to fix them, you can help ensure that your extrusions perform as expected for years to come.