finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing.
    no popups, no spam
HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics

topic 9656

Greyish white deposit on tin plating

(2001)

I am using a tin acid bath with 120cc/L of sulphuric acid for plating of small steel terminals. I get a bright finish on the outside using a voltage of 4-6 volts but the internal surface seems to be dull in places with a whitish gray deposit. If I scratch it off I find that the residue is covering a bright tin layer. Is there any way to remedy this problem? I am using a rack plating method.

Nadeem Akhter
Sanemca - Lahore, Pakistan


(2001)

Sounds like a brightener film which you might remove by a post dip in the alkaline cleaner.

pooky tom pullizi signature
Tom Pullizzi
Falls Township, Pennsylvania



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to 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 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.