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ted_yosem
Curated with aloha by
Ted Mooney, P.E. RET
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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
carter banner

"Electroforming for Beginners"
by Jason Welsh

on Amazon

(affil links)
December 29, 2021

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.

Barry Wechsler
art metal studio - Yorktown New York

Ed. note: This RFQ is outdated, but technical replies are welcome, and readers are encouraged to post their own RFQs. But 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_yosem
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
December 2021




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