Anodising is an electrochemical process that enhances the natural oxide layer on metal surfaces. It’s most commonly used on aluminium but can also be applied to titanium, magnesium, and other non-ferrous metals. By creating a thicker and more durable layer, anodising improves corrosion resistance, surface hardness, and overall aesthetic appeal.
One of the most common methods is sulphuric acid anodising, where aluminium is submerged in a sulphuric acid electrolyte to produce a strong, uniform oxide layer. This approach is widely used across a range of industries such as aerospace, architecture, automotive, and consumer electronics.
How Anodising Works
During anodising, the metal is submerged in an acid electrolyte bath and subjected to an electrical current. This causes oxygen to form on the metal surface, creating a controlled, thickened oxide layer.
The resulting coating is porous, allowing optional dyeing or sealing, enhancing durability and appearance. Unlike paint or plating, anodising integrates with the metal itself to create a unified surface, making it resistant to peeling or flaking. For those looking for sulphuric acid anodising, firms such as https://www.poeton.co.uk/surface-treatments/anodising/sulphuric-acid-anodising can offer advice on the most suitable anodising methods, coating thicknesses, and finishing options.
Common Uses of Anodising
Anodising is used wherever corrosion resistance, surface hardness, or decorative finishes are required. In aerospace and automotive applications, it protects aluminium components from wear and environmental damage. Consumer products such as smartphones, cookware, and architectural panels also benefit from anodising’s scratch-resistant and colour-enhancing properties.
Additionally, industrial machinery and electronic equipment often rely on anodised parts to ensure long-term durability in demanding conditions.
