No registration, no passwords; no pop-up ads -- just aloha, fun, & authoritative answers.
As an eBay Partner & Amazon Affiliate we receive compensation for qualifying purchases.
Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site
pub  Where the world gathers for
plating, anodizing, & finishing Q&As since 1989





-----

Passivation of electroless silver with tin chloride solution




We're probably all aware of tin chloride sensitising of non-conductive substrates prior to electroless deposition (silver onto glass, for example) I've also heard that the tin chloride treatment can be repeated on top of the silver as a protector against corrosion. Is anybody aware of this and is it used in other plating applications to protect the silver?

David Bamber
- UK
1999


I'm also interested on that subject. I don't know how to establish if the silver layer is passivated or not after treatment with tin chloride. May be with Salt Spray Test, mirrors with treatment and mirrors without it? May be Lavalle Test? (I prefer this one) It would be very helpful if you have more comments.

Carlos A Ramirez
- Santafe de Bogota
1999


Silver easily forms the intermetallic, Ag3Sn. This can be formed by electroplating and by pulse plating, and was looked into about 15 years ago to protect silver. If immersion tin were taken to completion I would suggest to "fix" it by heat treatment in an oven to 250-350°F for 20-10 minutes. The sulfide tests are good for quick evaluation.

Steve Koelzer
- Sunnyvale, California
2000




(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:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"