Re: Good Pyrotechnic Books / Orgainc Dye Question
- From: "hhc314@xxxxxxxxx" <hhc314@xxxxxxxxx>
- Date: Fri, 05 Oct 2007 14:46:50 -0700
On Sep 26, 6:28 am, Phil S <sa...@xxxxxxxxxxxxxxxx> wrote:
Hmm.... Here's another coincidence.
Emailing Bob at pyrosecrets results in;
"<quadrunner...@xxxxxxxxxxx> (expanded from <b...@xxxxxxxxxxxxxxx>):
host
gateway-r1.comcast.net[204.127.198.26] said: 550 208.97.132.75
blocked by
ldap:ou=rblmx,dc=comcast,dc=net -> BL004 Blocked for spam."
Why is pyrosecrets forwarding their email to you?
Why does the PayPal logo let me send a payment to
quadrunner...@xxxxxxxxxxx?
Thanks for removing my photo, and let me know if you need any more
KNO3.
ROFL Phil, you nailed him here! He likely figured that this bit of
deception woult go unnoticed.
Now to return to technological issues.
Anyone attempting to construct useful electrochemica cells is induced
to read some of the serious literature on the subject, which is
generally found in most physical chemistry textbooks dating back to
the 1920s, or an electrochemical or electroplating textbook published
anywhere from 1940 to the current day.
Cutting to the basics, you need to employ anodes of sufficient surface
area and which have a negligliable surface potention for the
electrolytic reactions that you are attempting to produce. Generally
speaking, platinum if the most effective, but platinum is costly, so
you simply reduce your platinum costs by purchasing electrodes
produced by plating platinum on a moderately intert substrates like
titanium. These are available at moderate cost and available under the
name of platinized titanium. Graphite electrodes obtained by removing
an cleaning in acid the carbon electrodes removed from a discarded
1-1/2 volt fence charger battery will work, but not exceedingly well.
It all depends on the operational energy efficiency you desire to
achieve. Add to that the fact that the anodes that you choose to emply
need not be identical. Ideal material components for anodes vs.
cathodes in a d.c. electrolytic cell can be quite different, since
very different issues manifest themselves at the cathode and anode.
I won't even attempt to try and explain the various electrode
considerations that come into play, or the reasons for the materials
employed. It suffices to explain to amateurs, that you likely should
be more concened with the surface are presented to the electrolyte by
your electrodes, that the material composing the anodes themselves.
Electrodes of far to small of a surface are will not produce the
results that you are trying to achieve, because the current density in
the immediate area surrounding the electrode will result in
undesirable effects, like boiling, electrolyte decompisition, and
other adverse effects.
Similarly, if you use a cathode of an impure type like carbon or
graphite, the carbon and metalitic impurities be drawn into the
electrolytic solution and contaminate your results. This is very
simple process to understand in precious metal plating, where the
anode is usuall platinized titanium, but the cathod is the work being
electroplated with the gold, platinum, or rhodium in solution. The
concept becomes vastly more complex in the case of electrchemical cell
reactions.
I'm a physicist/electrical engineer by education, and loosely
understand the concepts. There are a few regulars on rec.pyrotechnics
that know far more than I do about electrochemistry, and I hope that
they will add to the topic...things like what precisely is the
electrochemical reaction being sought for in an electrochemical
potassium perchlorate cell.
Also, there is a need to answer the question for oneself: Have you
produced potassium perchorate or potassium perchlorate, and what are
the spot tests to tell the difference?
Harry C.
.
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