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Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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How can we do on-line control of tin (g/l) in chemical bronzing?
At the current time we are chemically bronze plating wire. The copper is being controlled by UV light to a perfect grams per liter setpoint, but does anybody know of a way to control the tin grams per liter? Any feedback would be greatly appreciated.
Thanks,
wire producer - Newberry, South Carolina, USA
June 23, 2008
It might be possible to use a standard iodine solution of a strength a bit greater than your Sn control level, then colorimetrically measure the color of the excess iodine. Or, one might be able to add some type of buffering agent/ISA solution, and measure the Sn2+ via an ORP reading on the mixture.
Dave Wichern
Consultant - The Bronx, New York
July 3, 2008
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