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Ted Mooney, P.E. RET
Pine Beach, NJ
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for Metal Finishing since 1989
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Stainless steel anode baskets for acid electroforming bath?
adv.: Supplier of Copper Anodes, Nickel Anodes, Bismuth Metal, & Other Metal Products for Industry & The Arts
Q. Hi,
Intro: I am a decorative art metal craftsman and owner of a production studio.
Seeking an anode basket from supplier.
Question is whether stainless steel can be used for an anode basket which will hold copper chunks, in an acid electroforming bath; or whether resistance of the stainless steel to the acid will be problematic. Details of the bath (for identifying possible adverse resistance dependent on the level of acid concentration) are below.
The particular setup, for copper electroforming of copper vessels (ie selectively building up the work object surface which is copper to start), consists of a 15 gallon tank (15" dia x 19" high) and a simple copper sulphate
⇦this on
eBay or
Amazon [affil links] - battery acid
⇦this on
eBay
or
Amazon [affil links]
bath, composition of which is (per gallon):
10 oz copper sulphate pentahydrate
11 cups distilled water
4.5 cups battery acid
The solution level is 5" below tank top and the typical bath time reaches or exceeds 20 hours. 25 amp rectifier.
I doubt the shape / size of the work would matter but it is typically cylindrical, 5 - 6" dia x 5 - 7" high, such that the anode basket would be suitably wider in diameter, surrounding the work.
Many thanks in advance.
art metal studio - Yorktown New York
Ed. note: Sorry, this RFQ is old & outdated, so contact info is no longer available. However, if you feel that something technical should be said in reply, please post it; no public commercial suggestions please ( huh? why?)
A. Hi Barry. I've never heard of stainless steel anode baskets in an acid bath and believe that there is little chance of them working. Titanium is the usual material of construction, but an alternative would be cast copper anodes. They look a bit like the window counterweights in very old houses -- a round or oval slab of copper with a hook embedded in the top.
Luck & Regards,
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
December 2021
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