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

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

-----

Solderability problem

What can be the cause for the poor solderability for a bright tin plated pin, brass pin with copper underlayer.

Ken Soh
- Singapore
2003

The brighteners use in bright tin baths are organic, as such they co-deposit with the tin and can interfere with solderability. This is usually the case. However also over time intermetallics will form between the tin and the copper, rendering the part less solderable.

Jon Quirt
- Fridley, Minnesota
2003

Apparently the copper and/or zinc are migrating up thru the tin when heat is applied. Try increasing the thickness of the tin plate or use a nickel diffusion barrier between the brass and tin.

Robert H Probert
Robert H Probert Technical Services

Garner, North Carolina

2003

(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: