Anodising vs powder coating
Anodising grows a hard oxide layer into the aluminium surface; powder coating bakes a colour coat onto it. Anodised profiles keep a metallic look, powder-coated profiles give you any colour. Here is how to choose.
How anodising works
The profile is immersed in an acid bath and an electric current builds aluminium oxide into the surface itself — not a layer on top. The result is hard, corrosion-resistant and metallic in appearance, typically silver, champagne or bronze tones.
How powder coating works
Charged dry powder is sprayed onto the profile and cured in an oven, forming a continuous colour film. Any RAL colour (confirmed at quotation) is possible, from matte white window frames to bold project colours.
Key differences
Appearance: anodised keeps the metal look; powder coating gives flat colour. Repairability: powder coating can be touched up; anodising cannot be patched invisibly. Colour range: powder coating wins by far. Surface hardness: anodised oxide is very hard and scratch-resistant.
Which should you choose?
Choose anodising for standard window and door frames with a metallic finish. Choose powder coating when the project specifies a colour, or for bold architectural looks. Both suit exterior use when specified correctly.
See also: anodised finish, powder-coated finish.
Can anodised profiles be any colour?
Anodising offers a limited range of metallic tones — silver, champagne, bronze and similar. For other colours, powder coating is the answer.
Which lasts longer outdoors?
Both perform well outdoors when correctly specified. Discuss your environment in your enquiry so the finish is matched to it.
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