"Roger Hull" wrote in message
s.net...
I want to build a degreasing tank using Caustic Soda (aka Sodium Hydroxide
or
Lye) as the active agent. I am already aware of the necessary safety
precautions and EPA considerations. My questions a what material for
the
tank and how strong a solution? Thanks.

Roger in Vegas


I worked as an engineer in the food industry for more years than I care to
remember. We traditionally used mild steel tanks for the storage of our
caustic cleaning solutions and never had corrosion problems. The usual
strength of the solution was about 2-3%. Back when beer bottles were washed
and reused. the bottle washers were mild steel and had caustic solutions of
up to 7% and 75 Degrees C.for quick removal of labels. Again, corrosion was
never a problem.

Tom