Extruded aluminum is used for numerous applications in the construction and transportation industries. Once the material has been pushed through a die and shaped to your specifications, the surface can be finished in several ways. Here are a few finishing options you might consider after aluminum extrusion, depending on what your metal is used for. 

What Are the Options for Finishing Extruded Aluminum?

1. Anodizing

Anodizing is an electrochemical process that thickens the outer oxide layer of metal. Once the surface has been polished or chemically treated, it is dipped in an electrolyte solution that oxidizes the surface, creating a layer that protects against the natural oxidation process that occurs when aluminum contacts oxygen. It offers additional protection against wear and corrosion, but it also gives aesthetic value since these thick oxide layers accept vibrant colors. 

2. Powder Coating

Powder coating involves applying a dry powder that sticks to the surface using electrostatic energy. Once the powder is applied, it is usually cured using heat or UV light, causing the powder particles to fuse. This can add color and a protective layer after aluminum extrusion. Since powder coatings don’t typically include VOCs like paint, this option helps construction and transportation companies meet environmental regulations. 

3. Mechanical Finishing

Some extruded aluminum doesn’t need an extra layer of material, so the surface can simply be buffed, polished, or sanded to provide a smooth or textured surface. For example, many automotive parts like wheels are polished, so they appear smooth even though the metal is exposed. Additionally, sanding and grinding are often used to prepare extruded aluminum for other finishing techniques like anodizing.

If you use extruded aluminum for your construction or transportation company, rely on International Extrusions in Garden City, MI. In business since 1937, the company provides various metal fabrication services and specializes in aluminum extrusion. Visit the website for a complete list of extrusion services, or call (734) 427-8700 to request a quote.