Electrolytic capacitor with corroded through shell

[turbo!]

Anyone seen anything like this?  I can't tell if it leaked out due to corrosive environment or if it corroded from inside. Whatever fluid they used in this thing is beyond stinky I can smell it from feet away. This was in a pair with identical one in parallel. The other one tests fine capacitance and current capacity wise. This one is of course completely flat.

There's no bulging but it looks like there's signs of heat damage to the shrinkwrap on the interior side. I peeled off the shell so I can see what was going on.

[SeanB]

It did do quite a few years of service though. Looks more like it was damaged during pick and place or during assembly which dented the can and pierced the side, and the effects of time and electrical stress eventually led to the electrolyte blowing out into the sleeve. It is quite possible the sleeve would survive an impact or clamping that punctured the can, and then during soldering the can got hot enough that it flattened out and hid the puncture until it got brittle from years of heat and corrosive attack. Those caps are quite old, I have not seen them for quite a long time unless you have old electronics made in the 1980' to early 2000's in either Germany or Holland, where they were quite popular. they are not known to fail from any thing other than old age mostly as seals degrade.