5 FAQ About Anodising


Anodising is an electrolytic surface treatment, which involves submerging it in an acid bath and applying an electric charge to it. The temperature of the acid and the volts of the electric charge are controlled to create a chemical reaction, causing an oxide coating to grow out of, and into, the surface of the part. This coating is highly durable, and can offer extra protection for your components, as well as an attractive finish.

Why Should I Anodise My Components?

Anodising can add durability and longevity to your parts, increasing their lifespan. It is a tough protective coating that offers corrosion-resistance, abrasion resistance and wear resistance, and can increase the chemical resistance of a part, making it less susceptible to damage following chemical spills. As anodising is grown into and out of the part, rather than added as an external coating, it will not wear or peel off, and will therefore protect your parts for longer. In addition, anodising can add an attractive smooth, matte or dyed finish to your components.

What is the Difference Between Anodising and Hard Anodising?

Hard anodising is a thicker, more durable form of anodising, suitable for components used in hardwearing applications such as for engine parts, aerospace applications and heavy duty machinery. While standard anodising typically produces an oxide coating with a thickness of up to 30 microns, hard anodising can produce a coating with a thickness of up to 100 microns.

Can I Anodise/Put an Anodising Coating on My Wooden/Plastic/Silicone Components?

No. As anodising involves growing an oxide layer on the surface of components, it is typically only used for metals such as aluminium. It is not possible to anodise wood, plastic or silicone. These materials would not grow an oxide layer if submerged in acid, but would likely be damaged.

Can Anodised Parts/Extrusions be Sublimated?

Yes. The sublimation process, which involves an image penetrating the depth of a coating, can be applied to the anodic layer on an aluminium component or extrusion. This can offer you greater creative freedom in architectural or decorative applications where anodising is required or specified.

Can an Anodised Part be Painted/Powder Coated Over the Top?

Yes. Anodising is an effective pre-treatment as well as a coating in itself. It is possible to use anodising as a pre-treatment before powder coating or painting a component to give your part added corrosion resistance.

Find out more about DECO’s anodising services here, and our hard anodising services here



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