I need help to anodize a 4mm piece of niobium tube, which circles a
stg silver rod, in a stg silver brooch. I have tried following Bill
Seeley’s instructions but had no luck so far. I have cleaned/filed
back the niobium tube after all the soldering, and then tried to
anodize it by pinching the ferrule of a painting brush with the
cathode. Dipped the brush into the mixture, but nothing happens.
Have also tried wrapping a piece of titanium around a wet cotton bud,
then clamping the cathode onto the titanium, but still no joy. If I
put the object in the bath and anodize it the conventual way with the
anode, then the object will be a huge job to clean back to stg
silver. The niobium tube is loose around the silver rod. Is what I
want to do feasible?. All help appreciated.
Felicity in autumnal Perth West Australia