Stirring helps some, but where most of all that is happening is in the
micro part of the Nernst Diffusion layer where stirring can't reach that
nearly atomic level of activity.
..that inverse square stuff again.
Guessing:
To reach that level, it might take enough water velocity to cut
steel...tending to mechanically disintegrate the electrodes.
Humm...does a water jet cutter make colloidal iron?
ode
At 05:49 AM 12/13/2009 -0800, you wrote:
I was thinking high voltage AC, like 10-15 kv.
Perhaps the 60 hz ac doesn't work well because it switch so fast, it
doesn't give the silver particles time to separate far enough from their
electrodes, and they plate right back onto them in the reverse cycle?
If that is the case, then better stirring, or flowing of the water might
help. I haven't tried ac yet, but will as soon as I can get a
transformer. I keep missing them on ebay. :-)
I use DC now -- high voltage to start a fresh batch, and gradually lower
it to limit the current. Electrophoresis power supplies are readily
available on ebay. Switching polarity makes them work much better. So
one question would be: what is the optimum switching rate?
Dick
From: Alchemysa <da...@alchemysa.com.au>
To: silver-list@eskimo.com
Sent: Fri, December 11, 2009 6:48:52 PM
Subject: CS>Re: ac or dc?
Genuine low voltage AC doesn't work at all. (i.e. a low voltage 50/60hz.
AC wall adaptor). There a few low voltage AC adaptors around so don't
mistakenly try to use one.
It has to be DC (or DC with polarity swapping).
David
>
> From: Richard Goodwin
<<mailto:dickgoodwin2...@yahoo.com>dickgoodwin2...@yahoo.com>
> Date: 12 December 2009 4:49:46 AM
> To: <mailto:silver-list@eskimo.com>silver-list@eskimo.com
> Subject: CS>ac or dc?
>
>
> Which do you think works better for making EIS, DC that you have to
switch polarity on every minute or so, or AC, assuming everything else is
equal?
>
> Dick
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