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Repairing Pot Metal Flanges and Elbows
By Alan Douglas 

Pot metal was not made of anything lying around, or of chewing-gum
wrappers, or any of the other old-wives tales.  The problem was
impurities in the zinc which caused intergranular corrosion.
Wikipedia has some good articles under "Zamak" and "zinc pest"

Alan Douglas

 [ Ref. http://en.wikipedia.org/wiki/Zamak  and
 [ http://en.wikipedia.org/wiki/Zinc_pest  -- Robbie

(Message sent Mon 30 Jun 2014, 12:47:06 GMT, from time zone GMT-0400.)

Key Words in Subject:  Elbows, Flanges, Metal, Pot, Repairing
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