On Sun, 19 Aug 2007 01:47:49 -0500, Richard J Kinch
wrote:

Torrey Hills writes:

In the anodizing industry, some people are using titanium racks and
some are using aluminum racks. Why? What is the main difference? On
the surface, Ti racks cost more, (5-9x) but last a lot longer.

Titanium is inert in the process. Aluminum racks undergo anodizing
themselves.

Further: when aluminum racks become anodized, they are no longer
conductive on their surfaces so work hung on them is not connected to
the power supply and doesn't get anodized.