February 8, 2024
Designers and engineers often opt for chromate conversion coatings in their aluminum pieces. In fact, chromate coatings are one of the most common forms of passivation across industries. This process adds a secondary “skin” to your aluminum piece through this added coating, but why is it so popular?
In this quick guide, our manufacturing experts will explain 7 reasons why you should opt for a chromate conversion coating on your next aluminum project.
1. Additional Corrosion Resistance
One of the primary reasons to consider chromate conversion coating for aluminum parts is its exceptional ability to resist corrosion.
Even though aluminum is corrosion-resistant as-is, it will still rust over time. This is especially true when the metal is exposed to the environment or put in a process that exposes it to different chemicals and moisture.
How do you avoid corrosion over time? One way is to add a chromate conversion coating to your parts. A chromate conversion coating adds an extra layer of protection, forming a barrier that significantly reduces the metal's vulnerability to oxidation and other corrosive elements.
By creating a more robust and durable surface, chromate conversion coatings ensure that aluminum components maintain their integrity and functionality over a longer period.
2. Improved Paint Adhesion
Another significant advantage of applying chromate conversion coating to aluminum is the enhanced adhesion it provides for paint and other finishes. This coating serves as an excellent primer, creating a surface that allows paint to bond more effectively and uniformly.
This is particularly beneficial in applications where aesthetic appeal and color consistency are important. Moreover, improved paint adhesion means that the paint layer is less likely to chip, peel, or fade, thereby extending the lifespan of the painted surface.
3. Better Electrical Conductivity
A chromate conversion coating on an aluminum part is also beneficial in maintaining the metal's electrical conductivity. This is crucial for components used in electrical/ electronic applications where consistent conductivity is a requirement.
This coating allows for the preservation of aluminum's inherent conductive properties while providing the additional benefits of corrosion resistance and surface durability. This dual functionality makes it an ideal choice for industries where both electrical performance and material longevity are key considerations.
4. Environmental Regulations Compliance
In today's eco-conscious world, compliance with regulations is not just a matter of legal necessity but also a commitment to sustainability. Chromate conversion coatings can be added to your parts as a way to meet various environmental standards, including those that limit or eliminate the use of certain hazardous materials.
By opting for environmentally compliant coatings, your business can adhere to these requirements while also showing your dedication to sustainable practices.
5. Military and Aerospace Applications
For military and aerospace applications, chromate conversion coatings are commonplace. The demanding environments of these applications require materials that can withstand extreme conditions with better longevity and reliability.
A chromate conversion coating on aluminum parts is extensively used in these sectors due to its ability to enhance the metal’s durability and resistance to these harsh conditions. The coating provides a level of protection that is essential for components exposed to the rigors of aerospace and military use, where failure is not an option.
6. Adherence to Industry Standards
Adding chromate conversion coatings to aluminum pieces is also a way for your company to meet different industry standards. Obviously, these standards vary from industry to industry, but we’ve worked with a lot of companies that strictly needed passivation or coatings on all of the parts we made for them.
If there are standards that require your parts to achieve a certain level of reliability and precision, a chromate conversion coating might be the perfect option.
7. Reduced Friction and Wear
One of the most common reasons why people choose chromate conversion coatings is due to the added wear and friction resistance. This simple coating can dramatically change how your parts respond to friction and wear over time.
Remember, aluminum is a softer metal that tends to wear out quicker, especially as compared to titanium and steel. By adding a chromate conversion coating, your aluminum parts can last longer in dynamic applications. As a result, your parts should last longer, preventing the need for replacements and additional maintenance.
Trust Rapid Axis With Your Chromate Conversion Coating Service Needs
You just learned 7 different reasons why you should consider chromate conversion coatings for your next aluminum parts. If you need help from a professional machine shop that can expertly apply chromate coatings, consider Rapid Axis. Our team has helped countless engineering teams just like yours. Our full-service machine shop can fabricate and add chromate conversion coatings to any of your designed aluminum parts. Get a free quote today.