There is a variety of options for metal finishing, and each has a purpose. While people often are familiar with chrome plating and electroplating, they might not know about hard coat anodizing. LWG Finishing in Fairfield, OH, offers it among their list of services and explains how the process benefits metal surfaces and why you might need it.

The Hard Coat Anodizing Technique

Anodizing is an electrochemical process that creates an extremely durable finish on metal surfaces, typically aluminum and other nonferrous materials. To form it, aluminum is placed in an acid electrolyte bath that has an electrical current passing through it. A cathode is mounted to the inside of the tank while the metal acts as the anode. The electrolytes release oxygen ions that pass to the metal, where they combine with aluminum atoms. The process is similar to natural oxidation but occurs in a controlled manner to obtain the desired results. When the coating reaches a thickness greater than 25 micrometers, the process becomes hard coat anodizing. It’s used on almost anything made of metal, including automotive and aircraft parts, roofing, electronics, and medical and food preparation equipment.

Advantages of the Process

Hard coat anodizing creates a finish that integrates with the metal. The method leaves behind a porous surface that allows for additional processes, like coloring and sealing. This eliminates the need for the metal to be painted or plated and creates a finish that’s less susceptible to chipping, damage, and peeling.

Hard coat anodizing offers additional benefits. When strength and hardness are more important than aesthetics, it’s the finish of choice. Materials with this coating stand up to harsh environments like extreme temperatures and prolonged exposure to direct sunlight better than other products. However, since hard coat anodizing creates a thicker layer, it probably will increase the cost of a project.

If you think hard coat anodizing might be right for your product, consult LWG Finishing in Fairfield, OH. Drawing on 50 years of experience, they will explain your options, answer your questions, and help you choose the best finish for your needs. Call (513) 860-1156 to discuss your project and visit them online for more information about their services, including chrome plating and sandblasting.