url: http://escribe.com/health/thesilverlist/m60429.html CS>Mike M.'s process questions... From: M. G. Devour Date: Thu, 19 Jun 2003 19:18:34
>> Three feet of 12 ga wire cut in half should give about 3.8 square >> inches of wetted area for the anode and cathode. I run at 335 uA, >> so the current density is around 87 uA/sq. in. > Ummm, just to relieve me of digging out the calculator at this > late hour... You're not counting the surface are of both the anode > and cathode together, are you? Only the anode surface area counts, > right? And that's ~ 3.8 in^2? > Mike D. You don't even need a calculator for this one. 12 ga has a diameter of 0.080 inch. The circumference is pi * d = 0.25 inch, so 4 linear inches gives 1 square inch. But you knew that already. If you cut three feet in half, each half is 18 inches. When you form them into a "W", you need about an inch clearance to the mounting screws, and about 3/8 inch for a tiny wrap around the screw. So a bit less than 16 inches is under water. I estimate this gives about 3.8 square inches of wetted area. It's not exact, but close enough. It affects only the current density, and has no effect on the calculated ppm. Since both electrodes have the same area, I use either one to calculate the wetted area. In operation, an ion cloud forms around both electrodes. Theoretically, the anode could have a bit less area than the cathode, but both clouds are important in the formation of particles. The anode cloud will be slightly less dense than the cathode since the ions are moving away from the anode towards the cathode. You can see this effect by running the current density high enough to start misting. The mist appears first at the cathode, then a while later at the anode. But both electrodes will eventually form a mist. At least, this has been my experience. In practise, I may get a slight amount of residue on the anode. Not enough to write home about, especially compared to the heavy film that always formed at 1.4 mA/sq.in, and the black deposit under each electrode on the bottom of the glass. The curious thing is when I switch the anode and cathode electrodes, the black residue on the new cathode gets cleaned off. I believe Steve observed the same thing. But there is no deposit on the bottom of the glass, and it stays clean. Best Regards, Mike Monett -- The silver-list is a moderated forum for discussion of colloidal silver. Instructions for unsubscribing may be found at: http://silverlist.org To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
