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topic 0811

Uses for lead acetate in plating


(1998)

Q. I would like to know if anybody knows whether lead acetate might be used in a plating shop in any significant volume (in other words, not for lab tests), and for what purpose it would be used? Thanks!

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey

 


(1997)

A. Lead Acetate is a common catalytic poison used to restrain Electroless Nickel baths. It is present in trace quantities and shuts down the mechanism which would yield runaway plateout on tank walls, bath particulate matter, piping, etc. Too much will shut down the electroless bath altogether by interrupting the catalytic decomposition of the Borane-based Hydrides into free hydrides on the plating surface which then would subsequently reduce any nearby adsorbed Nickel ions. But unless the plater in charge of the process really knows what s/he's doing its not advisable to alter the stock concentration. Electroless suppliers have many formulations already on their shelves.

Regards,

Dave Kinghorn
Dave Kinghorn
Chemical Engineer
SUNNYvale, California



(1997)

A. Lead acetate is a component of many gold strippers. The lead facilitates the reactions involving oxidixing agents, complexing agents and atoms of gold.

Robert Audette
- Keasby, New Jersey



thumbs up sign Thanks gentlemen.

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey



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