The Grey Fuzzies
[My opinion from observation]
The grey fuzzies consist of silver deposited on the surface tension of
hydrogen bubbles. If the water is extremely pure, the hydrogen bubbles form
too slow at first for them to grow to a size that allows their bouyancy to
overcome their adhesion to the electrode and bubble off.
Silver deposits on the surface of the bubble stabilizing its size with a
shell and the bubble will not grow, so, another small bubble will start to
form on top of that one and the same thing happens over and over.
The process of small coated bubble formation continues eventually making a
fairly rigid structure that may fall off the electrode and sink to the
bottom or be small enough to float around as a 'chunkie' which will settle
out in time.
Decant or filter.
This is a feedback loop that only happens when the conditions are just
wrong. Either use less current or more electrode so the silver can evade
the bubbles, or use more current so the bubbles will form faster? [But
might result in larger particle formation]
Just keep an eye on the generator and wipe the electrodes free of
fuzzies now and then if they form. At some point in the process, they'll
stop forming but if left alone, they'll just get heavier and heavier and
waste silver.
If the bubble has not been stabilized, the silver will transfer from the
surface tension of the bubble to the surface tension of the water when the
electrode is withdrawn and form a thin layer of pure silver that gathers in
a depression created on the waters surface by it's own weight. It can be
spooned off.
The pressure wave from water currents produced by a stirrer going too
fast can compress the surface of the bubbles and prevent their growth too.
Ken
At 03:52 PM 2/28/2003 -0500, you wrote:
On Fri, 28 Feb 2003 07:59:16 -0600, melanie <[email protected]> wrote:
> but sometimes when I make a new batch, it comes
>out right away with all this gray stuff floating around in it. Does anyone
>know why this happens?
It's usually contaminated water.
If you're using distilled water, then the contamination is commonly the soap
residue from washing the brewing container.
Almost never happens for us guys (I never wash the container)...
Chuck
Don't be irreplaceable--if you can't be replaced, you can't be promoted
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