Anodising

Although anodising is usually used on aluminium parts, it can also be extended to titanium, zinc and magnesium. As well as improving resistance to corrosion, anodising can also be used to colour components in line with the end user’s requirements - this is called coloured anodising.

Anodising increases the thickness of the natural oxidation layer on the component’s surface by electrolytic passivation. In order to decrease the porousness of the surface - which can occur as a result of anodising - a sealing substance may also need to be applied once anodising has taken place.

Anodising is used for its aesthetic properties within the consumer products and furniture markets, whilst its ability to increase wear resistance makes it ideal for construction and defence applications. However, anodised surfaces can be susceptible to damage from acidic pollutants, which may limit the choice of application.

Used to produce

A corrosion-resistant coating, mainly on aluminium components.

Materials

Although anodising is usually used on aluminium parts, it can also be extended to titanium, zinc and magnesium.

Advantages

mproves resistance against corrosion.
Anodising can also be used to colour components.

Disadvantages

Anodised surfaces can be susceptible to damage from acidic pollutants, which may limit the choice of application.

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