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"TIN WHISKER PROBLEM"



1999

I'M A CADET PROCESS ENGINEER HERE IN THE PHILIPPINES AND I HANDLE TIN PLATING.THE BIGGEST PROBLEM SO FAR IS THE OCCURRENCE OF WHISKER AND IT AFFECT A QUITE LARGE NUMBER OF QUANTITY.I KNOW THAT SUCH PROBLEM IS COMMON IN TIN PLATING. I JUST WONDER IF THERE IS A WAY TO CONTROL IT OR TO AT LEAST MINIMIZED IT. THANKS. AIMEE

AIMEE MAGNO
- PHILIPPINES
^


1999

Aimee, There is a lot of info of this on the net. A good place to start is a web site at NASA by a Jay Brusse. http://misspiggy.gsfc.nasa.gov/whisker

Clinton Hilliard
- Columbia, Maryland
^


1999

The chief cause of whisker growth is the presence of stresses in the tin coating. Some methods to reduce are,

Tin/lead is the most widely used alloy plate to prevent whisker growth, but it does deposit about 7% lead with the remainder tin which has limits with contact to food. The most common fix is to underplate with nickel to about .0002. The underplate is actually beneficial in soldering operations while also reducing zinc migration of brass and copper alloys. Good luck

Tim Martin
plating shop - Springfield, Massachusetts
^

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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.

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