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the rust is iron oxide - the same as in red
pigments you might use to colour your plaster. Now there probably is some
reaction with the oxide and the lime which is a calcium oxide but I can't
see how it could possibly interfere with the slaking other than making a slight
pink tone. Actually the lime might even contain some iron oxide as both calcium
and iron are common combinations within rocks (ankerite is
one.)
john
----- Original Message -----
Sent: Saturday, April 27, 2002 5:00
PM
Subject: SB: 55 gal drum, rust &
plaster
Got a great deal on a bunch of 55 gal drums but
there is a light dusting of rust on the inside. We're pretty sure we
can't slake the lime for our finish coat in them, but what about the lime for
our sub layers. Anyone have any experience with these?
Jeff
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