No cost, no registration, no passwords -- just aloha, fun & authoritative answers
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

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,

Jeffrey Sutton
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

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: