Hard anodizing is a process that involves coating a metal, usually aluminium, with a tough, durable layer of oxide. This is done by passing the metal through an electrochemical process that increases its thickness and hardness. This process is commonly used in industries such as aerospace, automotive and manufacturing to improve the performance of the metal parts. Here we share some of the key benefits of hard anodizing.
Increased Durability and Hardness
Hard anodizing creates a much harder surface compared to untreated metal, which makes it more resistant to wear and tear. The anodized layer is typically much harder than the base metal, often more than twice the hardness of untreated aluminium. This makes parts last longer, especially in environments where friction is more common.
Corrosion Resistance
One of the most significant advantages of hard anodising by companies such as https://www.poeton.co.uk/surface-treatments/anodising/hard-anodising/ is its ability to resist corrosion. The oxide layer created during the anodizing process is highly resistant to lots of different environmental factors such as moisture, salt and even chemicals. This makes anodized parts ideal for use in harsh conditions, such as marine environments, where corrosion from salt and sea water is a major concern.
Improved Surface Wear Resistance
The anodized layer acts as a protective barrier that prevents the base metal from being scratched or damaged. The hard anodized surface can withstand these stresses without deteriorating quickly.
Better Thermal Resistance
Hard anodized metals have improved thermal conductivity and resistance to more extreme temperatures. The anodized surface helps dissipate heat more efficiently – beneficial in applications where metal parts are exposed to high temperatures, such as engine components.
Low Maintenance
Anodized surfaces are low-maintenance because they are resistant to staining and easy to clean. Since the anodized layer is tightly bonded to the base metal, it won’t peel, flake or chip like other coatings might do.
Environmentally Friendly
Unlike many other coatings, hard anodizing is an environmentally friendly process. The process uses water and electricity, and the by-products are relatively non-toxic compared to other forms of coating, such as painting or plating.