I am trying to anodize some tantalum and titanium items and I have
not been able to find a good protocol.
What is the ‘friendliest’ method of preparing the surface of
pieces prior to anodizing?
How do different electrolytes affect the finished product? I have
tried 5% phoshoric acid. It seems ok, fairly clean, though I don’t
like the idea of aerosolized acid. Is there an optimal formulation
for the bath?
I am using an EC Apparatus variable voltage power supply. Does
adjusting the amperage settings on this unit have any affect on the
For higher voltages, is it better to incrementally increase the
voltage? For example for a piece to be anodized at 200v will I get
better results by fully anodizing the piece at 25-50v increments?
There seems to be a lot of sparking and gas liberation at higher
voltages. The piece almost looks like it is frying. Can this be
The point of contact with the leads does not seem to take even
when I immerse that part in bath. How can I ensure that the whole
piece is anodized?
How critical is it that cathode and anode be of the same size?
Will the process be more gentle, particularly at higher voltages
if I increase the disance between cathode and anode? A lot of heat