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

-----

Tin plating turns black after soldering

July 9, 2010

Hi recently I encounter problem in my production line. Have a tin plated jumper turning black during soldering. The appearance of the plating is normal (matte silver colour).
Please advise what could have happen and what can I do to continue use these jumpers.
Thank you.

Karen Seah
QC Engineer - Singapore

August 8, 2010

Hi Karen,

It could be due to organic contamination of tin plating bath and cause excess carbon codeposit into tin deposit. Carbon content in tin deposit should not be more than 500 ppm. Recommend to do carbon polishing of tin plating bath when necessary.

Best regards,

David Shiu
- Singapore

(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: