I was waiting for a techspert in this area to answer. Here is my 1/2c general knowledge
type answer till they come back from their coffee break:

Cast anodes are generally cheaper to make than worked anodes. The grain structure in the
metal tends to be less uniform: the outside cools quicker than the inside resulting in
smaller grain structure, the inside cooling more slowly has a coarser stucture. This
results in differential erosion in use.
Working the metal by rolling or extruding results in a more idealised, uniform structure
and better performance characteristics, but represents a greater processing time to make,
therefore cost.
Some cast anodes suppliers have developed rapid chilling and so on to get closer towards a
worked structure, enabling them to say "our special cast anode process produces a result
as good as worked anode."
There is sometimes at least a degree of truth so you will need to verify this for yourself
on a case basis.
Other characteristics such as purity etc are not necessarily effected by any of this.
Mike Fenner
Bonding Services & Products
T: +44 1295 722992
F: +44 1295 720937

----- Original Message -----
From: edward edward szpruch <[log in to unmask]>
To: <[log in to unmask]>
Sent: 20 October 1999 12:27
Subject: [TN] Bar anodes for copper plating


> Hi technetters,
> I have basic question concerning bar deoxidized phoshorous anodes for copper
> plating:
> they are two basic types on the market:
> 1) cast anodes
> 2) rolled anodes
> Pro , contra and why.
> Hopefully to get responses,
>
> Edward Szpruch

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