On Aug 18, 9:28 pm, Torrey Hills wrote:
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.

Opportunities are never lost. The other fellow takes those you miss.

Ken

| Torrey Hills Technologies, LLC |
|www.threerollmill.com|
|www.torreyhillstech.com|

Can't imagine using aluminum for racks, it picks up surface oxidation
just sitting there. Bad electrical contact then. You'd also have to
strip the things after every use. We had titanium racks and used
aluminum spreader bars for holding the parts securely. Every so often
we had to dunk baskets of bars in the etch tank to clean them off, we
used freshly dunked bars for every rack fill. Since the place had an
aluminum extrusion plant, when the bars got to the point where they
were too small, they squirted out some more for us. The racks were
about 20' long and sat on two big pads for electrical contact at
either end, so oxidation would have been a big problem. Currents up
to 10000 amps. If you're going into production, use titanium. You'll
need titanium hardware, too.

Stan