TOP 12 Types of Aluminum Finishes

Aluminum components already have ample properties, but sometimes, they may require surface finishing. These components may have different surfaces and shine depending on the application requirements.

The top 12 types of aluminum finishes are discussed in the guide below, so let's read it.

Why are Surface Finishes of Aluminum Products Important?

Surface finishing for aluminum products is important because it impacts the final appearance and performance of the component. Surface finishing makes the aluminum components durable and aesthetically appealing and also enhances their functionality.

The different types of aluminum surface finish even enhance its electrical insulation properties and resistance against wear. The coatings on aluminum give them less friction, which improves their performance.

Types of Aluminum Finishes

There are different types of aluminum finishes that can be chosen for aluminum components and are discussed below:

1. As Machined Finish

As machined is the actual state of the aluminum component after it has been machined.

It doesn't have any additional process after machining and can be used for applications that don't need any mechanically finished components. It has tight tolerance and may also have some tool marks.

2. Anodizing

Eloxieren offers anodized aluminum finishes, which involve an electrochemical method converting the surface of aluminum components to a layer of oxide.

This protects aluminum components from corrosion and even enhances their aesthetic properties.

Anodizing makes the aluminum component wear-resistant and has different options for colors, which can add a lift to the appearance of these components.

3. Powder Coating

Pulverbeschichtung is the process in which particles of powder are spread on the surface and left for heating, which cures the component with the coating.

It offers a protection layer and can also have different colors for aesthetic appeal. It offers a rough texture but is environment-friendly.

4. Bead Blasting

Perlstrahlen is used for aluminum components, which improves the texture of the aluminum component.

It uses steel beads or glass, which is abrasive enough that, when blasted with pressure, it cleanses the surface of the aluminum components. It leaves behind a smooth and bright finish.

The component’s surface can be finished through bead blasting at first and then it can be subjected to further finishing processes.

5. Alodine Finish (Chem Film)

Chem film creates a passivating oxide film on the aluminum components. The component is dipped in a chemical bath for a certain time, and a chem film is developed from it.

It is relatively affordable compared to the anodization and improves corrosion resistance in the components. It is ideally suitable for applications that need high electrical conductivity.

6. Electroplating

Galvanik consists of depositing a layer of metal on aluminum components through the process of electrolysis. The materials usually opt as a layer of aluminum components composed of titanium, copper, zinc, chromium, nickel, etc.

Electrolysis enhances the crucial as well as the physical properties of the aluminum components and protects them against corrosion and abrasion.

7. Polishing

Polieren involves adding a layer of polish on the components which improves the look as well as life of the aluminum components.

Metal polishing helps prevent aluminum components from getting oxidized and contaminated as they can degrade over a period of time due to factors like temperature, air, and water exposure.

8. Brushing

Brushing is a process in which aluminum surface finishing is achieved with the help of an abrasive brush, which is moved over an extruded aluminum surface.

Brushing helps remove the imperfections on the aluminum surface and enhances its scratch resistance.

9. Laser Etching Aluminum

Laser etching aluminum is also an effective method of creating engraving or marks on aluminum components. A laser beam is used to create custom marks. It helps cater to various industries like medicine, aerospace, automobile, etc.

10. Bright Dipping

Bright dipping is a process of aluminum surface finishing that creates a polished surface for aluminum components. The components are immersed in acid, creating a reflective finish.

11. E-Coating

E-coating is a process of surface finishing in which the aluminum component is immersed in a bath, and made using epoxy and paint. The electric current is passed, and the particles are attracted to the component and deposited as a layer.

12. PVDF Coating

PVDF coating is a coating that involves color pigments on a resin. This process makes the aluminum components corrosion-resistant and fade-resistant. The process of PVDF coating doesn't require curing, and it makes the material suitable for outdoor applications.

Factors to Consider When Choosing an Aluminum Finish

There are certain factors that you must consider when choosing an aluminum finish, and these are as follows:

• The component's use must be analyzed, whether indoors or outdoors. If used outdoors, a coating that offers UV protection and corrosion resistance is needed.
• Opt for a surface finish that matches the aesthetics of the component and consider the textures, gloss, and colors while choosing one.
• The maintenance and life of the aluminum components are also assessed when selecting the surface finishing type. Anodizing, for instance, offers durable life, and powder coating is easy to clean.
• The cost of the surface finishing process is also a considerable factor that matches the long-term savings.

Schlussfolgerung

Surface finishing plays a very important role when it comes to aluminum components because it can totally change the way these components look and work.

Hence, selecting the right type of aluminum finish is very important, and the guide above may help here.

Choose The Best Aluminum Finish for Your Project with DEK

If you are planning to start a new project and need to have your aluminum components finished with the best surface finishing options, contact us at DEK.

We will analyze the environment and application your component will be used in and offer you the right type of surface finishing for the aluminum components.

FAQs

What is a natural finish on aluminum?

The natural finish on the aluminum is the mill when it comes out of the milling process.

What aluminum surface treatment is the best?

Every surface finishing process has its own benefits, but anodizing is one of the best surface finishes on aluminum components, making them wear and corrosion-resistant.

Can mill-finish aluminum be powder-coated?

Yes, ensure that the aluminum component is cleaned before applying powder coating.

Which surface finishing is ideal for preventing rust in aluminum parts?

There are different types of surface finishing that prevent the aluminum components from rusting— painting and anodizing are the top ones.

What is the difference between clear anodized and mill-finish aluminum?

The clear anodized aluminum has a layer of oxide on it, whereas the mill finish is the natural finish of aluminum.