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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Hi, has anyone else run into tin whiskers forming within days? This PS3 was working fine but stopped reading, turns out that there was an internal short between R and B anodes which appears to be classic whisker formation symptoms. did the 2.2uF/9V capacitor trick and unshorted it, now reads fine but not sure how long for.
No loss of power, I've seen this before on PS3 diodes with short between BDA and Gnd and RD-BD but normally it doesen't recover even if the whisker is blown out.
Registered Member #5258
Joined: Sun Jun 10 2012, 10:15PM
Location: Missouri - USA
Posts: 119
Thermally induced stress is one of the mechanisms behind whiskering. The lead in solder used to impede this (vs using pure tin) but after it's ban the problem has reemerged. Zinc an silver can also form whiskers, so that lead free silver bearing solder can also be prone to the phenomenon depending on the alloy.
Pretty interesting, albeit annoying as hell.
It's not the same reaction but it reminds me a bit of mercurys reaction with aluminum. Mercury Attacks Aluminum
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Tin whisker issue
