scrapparts
Well-known member
- Joined
- Jun 23, 2016
- Messages
- 142
The cell phone boards do have probably less gold than seen on the boards, in my opinion. There is a lot of copper under the gold plating, and depending on how you give the boards a bath, all the gold may flake away until you see noting floating or glittering in solution. I blame that on the gold traces being mostly copper and not gold, regardless of what you actually see on the boards.niks neims said:Excuse me about derailing this thread a bit but I do have a question regarding plating thickness on mobile boards like these: as I was doing my last bach in AP, I noticed that while gold plating from newer (blue, teal colored) boards basically desintegrated in to a powder, with no foils to speak of, I Had in the batch some green old looking ones (button phones, not touchscreen) from which there were some nice foils coming off, strudy enough to be picked up with tweezers (sadly gold colored on one side only) ... At the time I could not believe that there is such a thick plating on mobile boards so I assumed that there must be some metal between copper and gold (nickel?) not getting dissolved by AP. Was I wrong? Is it really possible for plating on older phones to be of such thickness? If that be the case it very well may help the OP sell them
Your process doesn't warant any concerns on my end, but I haven't came across any boards that dissolved or pretty much broke down in solution. No matter how you did it, just make sure to save the liquid solution. There could be gold in solution. If there is very little gold, even on plating like fingers and other green boards, the whole gold you see may dissolve into a liquid. That would probably mean that either 1) there was no gold at all or 2) there was so little gold, that the soltion dissolved the gold into a liquid.
You can stick a piece of flat copper into the solution and if there's any gold, it should collect on the copper and hopefully some will be at the bottom of the vessel.
On an ending note: After you have collected your foils, I would put them in some HCL solution on low heat. That will dissolve any remaining copper that may be there.
You could also take the washed foils and put them in a 50/50 solution of Nitric and distilled water. That too should dissolve the copper and leave the gold.
scrapparts.