On Wed, 02 Nov 2005 06:03:01 +0000, Brian Whatcott wrote:

On 1 Nov 2005 20:45:34 -0800, "az100" wrote:

Very few large masts perhaps but anodising is common for the mast size
in question.
BTW, anodising is an electro chemical process that affects ALL the
surfaces of the part being immersed in the anodising tank. It does not
require a special arm :-)

KS

Actually no. Anodizing reaches exterior surfaces of the anodic object.
To reach interior surfaces needs an interior cathode, not usually
done.

Brian Whatcott Altus OK

You sound like you know what you are talking about. I can certainly vouch
that when I have had tubing anodized, it only affected the outside of
the tubing.

What you say his makes sense from an electrical viewpoint as it is very
difficult to create an electric field inside of a conductive tube unless,
as you say, you put a conductor inside of it. And without the electric
field, no current will flow, and no anodization will occur.

--Mac