Aluminum is used in a wide range of industries, from food service to construction. No matter what its application, stronger, longer-lasting aluminum will bring you the greatest value. Hard coat anodizing creates a more durable and beneficial material. The following guide explains everything you need to know about this process.

What Is Anodizing?

Hard coat anodizing, also referred to as “Type III anodizing,” is an electrochemical process used to increase hardness and improve resistance to corrosion, abrasion, and wear. The process creates a controlled oxide layer on the surface of the aluminum. Upon final appearance, the coating can range from light to dark gray, depending on the alloy and thickness. It can also be dyed black or processed with additional finishes, such as electroless nickel plating.

How Is it Processed?

To begin the process, the aluminum is immersed in a sulfuric acid bath. The metal itself acts as a positive electrode (anode), while a cathode must be attached to the inside of the tank. An electric current passes through the anodizing tank to create the oxide layer. Essentially, it is a controlled form of the naturally occurring phenomenon of oxidation.

What’re the Benefits?

Unlike painting, the oxide finish generated through this process comes from the aluminum itself, making it resistant to peeling, flaking, and chipping. The anodized coating acts as a layer of protection, making the aluminum more durable and tolerant of high temperatures. It’s easy to clean, requires little maintenance, and improves and preserves the metallic finish and overall aesthetic of the aluminum.

In commercial use, hard coat anodizing is highly advantageous. For example, aluminum hard coating boasts a high dielectric strength, meaning it has a high tolerance for electricity and is perfectly suited to electronics. Other common industrial applications include food manufacturing and preparation, aerospace, general machinery, architecture, and medical equipment. If you want stronger aluminum better suited to your needs, anodizing may be what you’re looking for.

Would your aluminum machinery and equipment benefit from hard coat anodizing? LWG Finishing in West Chester, OH, provides top-quality plating, coating, and cylinder repair services for industries throughout the tri-state area. Specializing in hard chrome plating, they work closely with each client to provide top-notch customer service and ensure the job is completed to your satisfaction. To learn more about what they can do for your business, visit their website. Call (513) 860-1156 to speak with a knowledgeable team member and request a free quote.