Powder-coating is an organic finish, paint, while anodising is an inorganic finish.
So, what is the difference? Anodising is an inorganic finish that is a straightforward electrochemical process, which increases the thickness of the natural oxide layer on aluminium. Powder-coating conversely is a technique used to apply decorative finishes, in a process that electrostatically charges the powder, spraying it onto the aluminium and then it cures in an oven into a smooth coat.
Advantages of Anodising
- Easy maintenance with periodic cleaning with water and a mild detergent
- The anodic coating will not peel or flake because it is part of the metal
- Anodising gives of a translucent metallic appearance because the base metal can be seen underneath the coating
- Sunlight does not affect it and is predominantly fade resistant
- Consistent finishing, regardless of angle viewed from
- There are no VOC’s emitted
Cons of Anodising
- Surface can be affected by acidic pollutants
- Potential for colour variation between batches
- Usually only available in a matt or polished finish
- Can only be applied to aluminium
Pros of Powder-Coating
- Dents and scuffs can be easily repaired using liquid coating that matches the original colours
- Powder-coated aluminium will look the same as other components powder-coated in the same colour/s
- Huge range of finishes available
- More colour uniformity between batches
- No air pollution from the finish
Cons of Powder-Coating
- Filiform corrosion resembling threadlike filaments may form under the finish if incorrect pre-treatment methods are used
- If the applied coating film is either too thick or thin, or if the powder coating material is too reactive, orange peel may occur
- Chalking which looks like white powder on the surface, may appear if the incorrect curing process is used
View our anodising and powder-coating options HERE.
References:
https://sculptform.com.au/aluminium-surface-treatment-anodising-vs-powdercoating/