The Anodised Finish

The oxide film renders a hard, durable, weather resistant surface finish to protect the underlying base metal, and unless severely deformed or stressed by excessive thermal movement, the anodic film will not chip, peel, or crack.  

The electrochemical process causes the film to actually grow from the base aluminium metal, and therefore becomes integral, i.e. part of, the base metal.

Conventional sulphuric acid films, produced for external applications, are microscopically porous. Inorganic compounds may be incorporated and sealed within the film to produce a range of colours.  

These durable anodic films, whether coloured or not, are necessary in exposed environments and exhibit longevity, particularly suitable for New Zealand’s high ultraviolet and coastal environments.