On 4/25/2017 11:05 AM, wrote:
1. The leads tend to corrode from dialectric corrosion, where they
contact the inner foil. (I have read that moisture can and does enter
these caps, even with the best wax coating).

No and yes

2. Voltage arcs burn across the paper layer, arcing between the two
layers of foil, and burn a hole into the paper, which allows the two
layers of foil to contact each other, and cause a short circuit.

Not until there is a fault.

3. The foil itself decays from age, and loses conductivity in parts or
all of it's roll.

Not so much the foil as the paper dielectric.

First and foremost, the paper was NOT acid free archival paper.
Mainly because everyone assumed the wax would seal the moisture
out. It doesn't because it is hygroscopic.
So what happens over time is moisture gets into the capacitor
paper, mixes with the acid content eats the metal foil and causes
conductive paths in the paper.
At first the leakage goes up, until some point when the capacitor
fails shorted.



--
Jeff-1.0
wa6fwi
http://www.foxsmercantile.com

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