Subj: Update on the Solubility of Silver and Selected Silver Alloys in DW Date: 4/8/01 7:27:22 AM EST From: ROGALTMAN To: [email protected] CC: [email protected], GvanLier, [email protected] CC: Jscott4metals, [email protected], [email protected] CC: [email protected]
List: After 691 hrs, or almost 1 month after immersing various grades of 20 ga. silver wire in sealed 1 oz. plastic bottles containing ~ 1oz. of DW, I have found that silver and Stirling silver (92.5%Ag/7.5%Cu) do not appear to dissolve significantly in DW. The 75%Ag/22%Cu/3%Zn alloy showed an XS conductivity of 0.3 ms which is borderline XS above the DW control conductivity. The 70%Ag/20%Cu/10%Zn alloy showed an XS conductivity of 4.1 ms (1.3 ms after 90.5 hrs), about 258% above control conductivity. The 65%Ag/20%Cu/15%Zn alloy showed an XS conductivity of 5.7 ms (2.3 ms after 90.5 hrs), about 219% above control conductivity. The 56%Ag/22%Cu/17%Zn/5%Sn alloy showed an XS conductivity of 1.5 ms (0.7 ms after 90.5 hrs), about 119% above control conductivity. There is little doubt that the XS conductivities I'm reporting are due to metallic dissolution, and are not anomalous conductivity readings, or conductivities due to the presence of additional CO2 since I'm using the same plastic container (handled the same, and filled to the same level) as a DW control. So the trend observed at the 230 hr. mark continues unabated. Despite its low level, the tin continues to appear to passivate somewhat the 56% Ag alloy surface. Anyone out there know the difference between Sterling silver and silver coinage metal? It may be that IF silver coinage metal has other metals that make up the 7.5% "balance," a greater dissolution in water may occur due to the presence of various type of corrosion cells. I now plan to send these samples to Frank Key who graciously volunteered to analyze them by AA for silver to confirm the tentative conclusions I've made from the conductivity values alone. As soon as Frank has completed these determinations, I'll report the final results. Roger -- 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]>
