acid bath acting weird
alright, I've been trying to anodize this one part for a while now and I thought before that the lye bath was my problem but I'm not so sure anymore. The surface area calculates out to about 0.6 sq. feet and I'm anodizing at 4.5 amps per square foot which comes out to 2.7 A. So, when I dial in the amperage the voltage goes way up to about 30 but then the acid bath starts to make a hissing noise (I can't find what specifically is making it though) and the voltage levels off at around 21V and the tank continues to hiss.
should the voltage be that high? and should it be hissing like that? I'm using lead cathodes with a larger submerged SA than my part, aluminum racks, 1:3 acid to water, the lead out of the tank looks a little corroded but I'm not sure if that has anything to do with it.
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