Ivan Anderson wrote: > Another thing Guenter, > > As the AC wave form is sinusoidal, when the voltage passes through > zero to the opposite sign, the attractive force is low but the > particles having some inertia, drift further from the electrode. This > and the fact that the solution acts to slow the propagation of the > energy front (the electrical or electrostatic propagation relies on > the movement of ions and lags and is slower than the input from the > electrode) would also help to ensure the escape of the majority of the > particles.
Also don't forget that the particles are mutually repulsive during both cycles, insuring that an additional diffusion vector away from the higher concentration level, near the electrode, is always away from the electrode. > Those particles that do find themselves reduced at the electrode may > well be the first to be oxidised at the next change of phase. > The reactions at the electrode are very complex and not as straight > forward as I had previously thought, involving electrode polarisation, > overpotential and so on... understanding the bulk solution chemistry > is far more intuitive, I have found. I believe that the smaller particles make it far away from the electrode at the high voltage and 1/120 of a second to mostly not get pulled back in. The larger particles don't diffuse very far and likely do get pulled back to the electrode, to get redeposited as silver, for another try next cycle. This is why I believe that the particle size profile on HVAC tends to be for much smaller particles than with the LVDC systems. The larger ones get recycled. Marshall -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
