Hi ya'all, I hope that I can shed some light on the problem between Mike's work and mine.
Mike is working in the low voltage (<v6) and at low current, so that little or no oxygen is liberated at the anode and hence it stays clean and the work function for silver remains at 3.09. While I am working in the 27 to 36 volt range and the anode blackens very quickly and its work function approaches 4.31. I very seldom clean the anode but always wipe the cathode. In addition I always use mechanical stirring. A review of "electrolysis" where they use cylindrical anode and concentric cylindrical cathode with constant stirring to measure the plate out of a metal ion from a solution, (in the book "Instrumental Methods of Analysis" by Willard, Merrirr, and Dean, I find the statement that "the mass transfer coefficient is dependent on the rate of stirring, cell and electrode geometries, diffusion coefficient of the electroactive species, and the like." While this is not electroplating (CS process) the admonishments should not be ignored. It would tend to indicate that for several people to get the same results then identical setups may well be required. In trying to nail down the conductivity question, yesterday I made a new conductivity cell based on 1" x 1" x 1" which would give results in uS/inch instead of uS/cm. When first immersed in the tank of CS the conductance reading for clean silver electrodes was 86 uS/inch. After about 2 hours the reading had slowly change as the electrodes blackened and stabilized at 92 uS/inch. My standard 1 cm x 1 cm x 1 cm probe gave a reading of 36 uS/cm. One would expect the reading to closely follow the ratio of cm to inch and it does ! The ration is 92/36 = 2.55 rather than 2.54. This can well be due to assembly or parts fabrication errors. The only thing left for me to do is find a laboratory that has a good conductivity to cross check my results. I will find the answer !!!!!! "Ole Bob" -- 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: silver-list@eskimo.com Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <mdev...@eskimo.com>
