Full guide to surface treatment of die cast aluminum parts: Which is better, anodizing or spraying?

There are two common ways to make die cast aluminum parts look and last better: anodizing and spraying. Each approach has its own pros and cons, depending on what you want. At Hongfa Shunda, we recognize the importance of selecting the appropriate surface treatment to guarantee that the parts satisfy the desired durability and quality specs. 

Anodizing and Spray for Die Casting Aluminum Parts  Know the difference

The anodizing process uses a chemical bath to produce a protective layer on the aluminum. You see, this coat is integral to the metal so it won’t peel nor chip. However, the spraying is to have a paint or powder coating applied to the extruded aluminum enclosures surface. This technique is like placing the aluminum under a protective veneer, which can be found in a range of colors. 

Is it good to anodize the surface of an aluminum part, or spray paint it? 

Anodizing is wonderful, because it makes the aluminum stronger and more corrosion resistant. But usually, the colors you can use are limited to metallics. Also, spraying gives you more color options which is ideal for parts that needs to look a certain way. The coating itself could also chip or scratch over a few years, which wouldn’t be best for a heavily abused part. 

Learn all about anodizing die cast aluminum for the best results

To anodize aluminum, you need some basic equipment: a plastic tub or tank, a plastic hanger, a power supply (12v to 24v), a 3.6 amp battery charger, 2 gal of 70 degree F distilled water and 4.5 gal of 70 degree F sulfuric acid. The parts are then submersed in a chemical solution and an electrical current is passed through. This action pavers the way for a protective anodic film. At last the parts are sealed in order to keep the coating in and increase its resistance. This is a little more complicated, but worth it for parts that must survive for a decade or longer. 

Investigating the advantages to spray as decorative treatment for the metal parts in aluminum

The spraying is faster than anodizing. All you’ve got to do is to ensure that there is a uniformly painted or powder coated finish on your parts. It's also more affordable and available in many colors and finishes. If you have to match a particular color application or if the aluminum amplifier case parts are not subjected to extreme conditions, it is a good option. 

How to Choose the Right Surface Treatment Method of Die Cast Aluminum Parts? 

Selecting the appropriate surface treatment is a function of the use to which the part is put and the environment that it is subjected to. If it’s a very durable part that is resistant to corrosion, anodizing could be the better option. But if you require special colors or a more-budget-friendly approach to spraying might be better. Remember that you have to think of what will Extruded Aluminum Enclosure parts be used for in the end.