Designed Anodizing 
Anodizing
 
 
 

Anodising is the general name
applied to methods of treating
metals, where the work piece
is made the anode in an 
electrolytic cell, usually to form 
oxide coatings for the purpose
of increasing the performance
of the surface.
 
 
 

 

 
 
 

In the case of aluminium, the anodising process forms a layer of aluminium oxide - Al203 - or corundum, which is very hard, relatively inert, 
electrically insulating  and can absorb dyes to colour the film. 
 
 
The anodic film itself grows at the aluminium / aluminium oxide interface by the continuous formation and dissolution of a layer of oxide, this is the
so-called barrier layer and its thickness is a function of the process starting voltage. A porous, more structured layer forms on top of the
barrier layer making up the rest of the coating.
 
 
 
 
 
 
 
 
ANODIZING EXPLAINED 
 
What is anodising?

Anodising is the process by which the natural film on aluminium is greatly increased in thickness.
Aluminium metal is on the anodic side of the galvanic series. Its position is similar to zinc and magnesium, ie it is readily oxidised. 
 
   

 

 

 

Designed Anodizing 
Anodizing
 
 
Anodising is the general name applied to methods
of treating metals, where the work piece is made
the anode in an  electrolytic cell, usually to form
  oxide coatings for the purpose
of increasing the performance of the surface.

 

 

 

 
 
In the case of aluminium, the anodising
process forms a layer of aluminium oxide
 - Al203 - or corundum, which
is very hard, relatively inert, 
electrically insulating  and can absorb dyes
to colour the film. 
 
 
The anodic film itself grows at the
aluminium / aluminium oxide interface by
the continuous formation and dissolution
of a layer of oxide, this is the so-called barrier
layer and its thickness is a function of the
process starting voltage. A porous, more
structured layer forms on top of the
barrier layer making up the rest of the coating.
 
 

 

ANODIZING EXPLAINED 
 
What is anodising?
In the case of aluminium, the anodising process forms a layer
of aluminium oxide - Al203 -
or corundum, which is very hard, relatively inert, 
electrically insulating  and can absorb dyes to colour the film. 
 
The anodic film itself grows at the aluminium /
aluminium oxide interface by the continuous
formation and dissolution of a layer of oxide, this
is the so-called barrier layer and its
thickness is a function of the process starting
voltage. A porous, more structured layer
forms on top of the barrier layer making
up the rest of the coating.