Re: copper scrubber question
- --- In Distillers@yahoogroups.com, "izdrunk" <izdrunk@...> wrote:
>I stoppped using copper mesh in a stainless column as I had problems
> What is the lifespan of copper scrubber mesh in a stainless steel
> tower? I have used it aa few times and I backwash after each run.
> Just wondering.
with a silvery deposit working it's way up the mesh and eventually
coming out with the spirit, esp as the %abv dropped. Wasn't sure
whether this was a time thing or corrosion problem increasing as the
amount of water in vapour increased, but when looking on the home
distillation site for answers (I think it was there), found a table
giving the galvanic corrosiveness of various metals. Worked out that
copper was likely to corrode when in contact with stainless and an
electrolyte. Same thing happened when I tried to attch a copper
condensor to my stainless column.
I've since gone to an all copper column/condensor and the mesh just
needs a bath in citric acid, lemon juice or vinegar to remove the
tarnish before I do a clean spirit run, and although I'm prob losing
a bit through the cleaning and use, it's lasting ok, much better than
in the stainless column. Much may depend on the type of wash, and the
boiling vessel also... good luck!