Anodising: What You Need To Know

You know all about basic metal finishing, but do you know about anodising? In this blog post, we outline what anodising is and how it’s used in the metal finishing process.

What is anodising?

Anodising is the process by an electrolytic passivation is carried out to increase the thickness of the natural oxide layer on the surface of metal parts. This process involves the metal to be treated being submerged in an electrolytic solution which coats the surface of the metal.

How is anodising used?

Most commonly, the anodising process is performed on aluminium. However, the metal finishing technique can also be used on titanium, zinc, magnesium and more.

If you’re finishing a metal that you want to be protected from corrosion and wear that will also provide a better adhesive layer for paint primer or glues than bare metal, then you can achieve this by anodising to create a protective film.

This process can be used to add a wide variety of vivid colours to the surface of metals.
Anodic films can also be used for cosmetic metal finishing effects, which give the metal treated a particular appearance. For example, a metal keyring, car alloy or jewelry item can be finished with a dyed electrolytic solution which gives the metal a stronger, coloured and more attractive outer surface.

Where can anodising take place?

The process of anodising metal can be carried out both in a home or small workshop environment and on a mass production scale and the same process can be followed for both small and large scale to much the same effect on the final product.

The process of anodising will be much the same in both instances, the only difference being the scale of operation and whether it is carried out by man or machine.

For more information about anodising, or any other metal finishing techniques, get in touch with Metal Finishing UK.