Dougplogan
Well-known member
I tried to digest the soldering off some cpu pins the other day. I used a coffee pot on a coffee maker added the pins and HCl. The next day soldering was smaller but still present. Let sit for two days to the point most of the foils are loose. At this point the foils are breaking up so lots of tiny gold specks mixed with tiny copper pins and some were dark some other base metal. I drained rinsed well with distilled water. Soldering still on bottom of pins. Did a nitric boil which has eaten all of the metal but leaving metastannic acid powder now. My question is this new soldier is mixed with silver right? It won't desolve in HCl but still puts tin in the nitric right? Just wondering not experienced enough to make guesses but I can deal with the metastannic if that's what it most likely is. Tomorrow I'll test and see if I'm wrong and see if this will desolve in fresh nitric before I try anything else. It boiled for several hours so I'm sure nitric is used up for the most part. Also just a note. I know when I first added nitric some gold would have gotten digested but so much copper was there it quickly cemented out. I varified that with Stan is tests