Hi everyone, I'm just getting familiar with AP ran 5 different very small test batches to get acquainted test 1 had fingers off of about 20 boards, test 2 had 5CPU's, test 3 had the female CPU pins off the mother boards, test 4 had all the other plated pins off the mother boards, and test 5 had two older sticks off ram, I started with a 3:1 HLC to peroxide mix on all 5 test; test 1, 3, an 5 after one hour turned a nice emerald green, test 4 turned a pale green, test 2 immediately bubbled, fizzed and made a white cloud after an hour the liquid was clear, in test 1, 3, and 5 I left them sit stirring occasionally, test 4 I added a little more peroxide hoping to jumpstart the process and have left it sit stirring occasionally, test 2 I added a little more HCL and a capful more of peroxide an hour after that it as a nice emerald green. when I checked them this morning I have noticed that most of the foils in test 1 have come off, most the pins in test 2 have come off and all the foils in test 5 have come off, test 3 about half the starting mass has dissolved but I can still see more needs to dissolve, test 4 is still a pale green with minimal change to the pins; test 1,2,3, and 5 have all turned an extremely dark green with a hint of brown, I actually have taken the two ram sticks (which were broke in half to fit in the mason jar) and rinsed them. the pictures below are of the rinse water, the cleaned ram, and the acid mix.
I hope those loaded right, I have other pictures but until I get the time to create a online album to link to so that I don't increase the cost of the web site to greatly I was just posting a few images from the test that's doing the best, I figure test 1 and 2 will be ready to move to the next step today or tomorrow, while test 3 still needs a few more days in AP and I think test 4 needs filtered, cleaned, incinerated to get rid of any excess acid and then remaining metals put aside till I move on to learning another process as AP is not a good process for those pins, but that was the point of these small test, reading about something and seeing the actual differences are two totally different ways of learning and I'm more a hands on kind of learn so even though my research told me that those pins would react the way they did I still wanted to compare it to the other test. Most the foils from this test as well as test 1 & 2 which have all had the fingers, ram, and CPU's removed left most of their foils and pins in the AP solution. If I'm understanding this correctly I need siphon all the AP solution off and wash the foils before processing with HCL-CL should I also after first process of HCl-CL then rewash the precipitate and reprocess with HCL-CL before melting for a higher purity or is this second processing going to just be redundant?
Thank You in advance for your wisdom in this.
