Of the many kinds of surface treatment available, anodising, or the creation of an oxidised layer, has distinct advantages and disadvantages. You need to know when it is an appropriate choice and when it may be better to choose an alternative, such as plating.
What Is Anodising?
When you place a metal such as aluminium or titanium in an acidic solution, then pass electricity through it, it causes oxidisation, or the addition of oxygen ions. This is like rust forming on iron, but aluminium oxide and titanium oxide actually enhance the properties of the original metal.
Pros of Anodising
The main reasons that people choose anodising as a form of surface treatment are that it creates a strong, durable surface that will not flake or peel and is not toxic. It will also have a rich, lustrous appearance and be easy to clean with water and mild detergent, aiding maintenance.
Cons of Anodising
Not all metals can be anodised. Stainless steel and even some grades of aluminium are unsuitable. It is also not as consistent in results as plating. Different batches may be of slightly different quality, and sometimes colour will vary even within the same batch. The main reason it is not used is it is a complex, sometimes expensive process that requires specialist expertise such as that at https://www.poeton.co.uk/surface-treatments/anodising.
Anodising can make a surface stronger as well as improve its appearance whilst still being compatible with other forms of treatment. It is, however, a complex process that may not always be the most efficient or effective choice.
