Chemical Film On Aluminum

A chemical film is also known as chromate conversion, yellow iridite, or alodine. This process is used to coat the different aluminum parts in order to protect it from corrosion. It can also be used to prepare the metal surface before it undergoes primer and painting or powder coating finish.

In this article, we will be focusing on the chemical film finish and we will be discussing its different benefits and uses in the industry. If you are not sure whether a chemical film is the finish you need for your aluminum product, read on below if you want to know more information.

What are the Benefits of Using and Choosing the Chemical Film Finish on Your Aluminum Parts?

  • Protects from corrosion and wear and tear
  • Serves a good base for paint and adhesives
  • It can be used as lubrication carrier
  • Helps conduct electricity unlike other finishes
  • It is useful for metal parts that have critical dimensions
  • Cost-effective (can help you save up on your finances especially if with a limited budget)
  • Helps provide salt spray resistance, for equipment exposed in salty environments like the seas and oceans
  • It can be used to process a high volume of orders
  • It can be used to process bigger parts that can reach up to 12 feet in length
Chemical Film Finish

A Chemical Film Finish is Used in Different Industries Such As:


The chemical film is applied as a base coat for the vehicles, and tactical equipment.


The chemical film is applied as a base coat for the vehicles, and tactical equipment.

Aviation and Aerospace

The chemical film can be used to repair anodized surfaces and corrosion protection on the different aircraft components and equipment.


The chemical film is used for added protection against corrosion on housing projects.

It is also used in different high technologies, heat sinks, wheels, aluminum parts, aerospace, and medical equipment.

Aluminum chromating or chemical film is used to passivate an aluminum part’s surface. This specific aluminum part is converted to chromate by using a chemical reaction. This process helps preserve the life of an aluminum product by preventing corrosion and oxidation that normally occurs on aluminum parts that are left untreated.

The chemical film can also provide an aesthetic effect on the specified part and it results in improving the overall appearance of the aluminum part. It can also be used for products that need to conduct electricity because it has low electrical contact resistance.

SEI Castings can provide you with MIL-DTL-5541, the most common standard for chemical film finishes. Please do not hesitate to contact us if you are not sure if Chemical film is the right finish for your metal part. We will make sure to meet your specified requirements accordingly.

SEI Castings is a well-known custom aluminum die caster and knows a lot of knowledge on when to use the different finishes on your metal parts. The chemical film is the chromate conversion coating that can be used on aluminum parts to protect it from corrosion but still maintain its conductivity properties.
It is also used as a form of preparation for the metal parts before it undergoes primer and paint, or powder coating so it can help improve adhesion of the metal part.

SEI Castings is the company of choice if you need chemical film finishes on your aluminum metal parts or everything casting related. No need for you to do endless hours of searching online. We will do our best to provide you with excellent customer service.

Please contact us at sales@seimw.comĀ if you have inquiries regarding our services. You can also request a quote for your product requirements. We will do our best to get back to you as soon as possible.