-- The Home Page of the Finishing Industry
Serious Education & the most FUN
you can have in metal finishing smiley

No popups, spam, registration or passwords
on this site
current topics
topic 8027

Poor Coverage of Copper Parts in Stannous Sulfate Tin Bath


My problem involves poor coverage of copper parts in our stannous sulfate tin bath.The problem seems to have come on quite suddenly but perhaps this is because we don't use this bath on a daily basis.

Our parts are rack plated and there seems to be tin throwing to the lower portion of the parts but bad or none to the upper, especially around the contact point of the rack and parts. I am suspecting we need to add a brightener or some type of additive, but don't have information on analysis to determine type and amount(s) of additives. All of our known analysis information shows no problems. Your help would be greatly appreciated.


Benigna Skorobogatiene
Benigna Skorobogatiene
electrical components mfgr. - San Jose, California


A hull cell panel will tell you plating range of the bath. It will also tell you if something is interfering with the throw. Once you know the range the tank is plating best in try adjusting the current density. Check your Copper will rise rapidly from dropped parts and start to poison the bath.

jim conner
Jim Conner
Anoplex - Dallas, Texas USA

If you have a question in mind which seems off topic, please Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.