Hoping for some insight on moving forward with a batch of fingers I'm trying to process.
I have approx. 7 1/2 lbs of memory fingers sitting in AP right now, originally generated by 1 gal of 32% HCl and 1/2 Litre of H2O2. After a week of working it seemed to have stopped, so I added another 1/2 L of H2O2 (making the overall ratio approx. 4:1 HCl to H2O2), and an aquarium bubbler. After another 7 days it seemed to have taken on a deep brown colour and didn't seem to be making any further changes, so reading up it sounded like the solution was saturated.
I added an additional 500 ml of HCl to introduce more free Cl to attach to the remaining copper.
3 days later, approx. 50% of the fingers are still attached. I pulled a few out to test and they aren't remotely loose. The colour of the solution remains a really dark brown (or possible green), borderline black.
I don't want to keep adding volume to the solution unless I need to....so the question is, do I need to? Is the solution saturated with copper, and if so, do I just keep running the bubbler and adding HCl?
Thanks for any advice.
I have approx. 7 1/2 lbs of memory fingers sitting in AP right now, originally generated by 1 gal of 32% HCl and 1/2 Litre of H2O2. After a week of working it seemed to have stopped, so I added another 1/2 L of H2O2 (making the overall ratio approx. 4:1 HCl to H2O2), and an aquarium bubbler. After another 7 days it seemed to have taken on a deep brown colour and didn't seem to be making any further changes, so reading up it sounded like the solution was saturated.
I added an additional 500 ml of HCl to introduce more free Cl to attach to the remaining copper.
3 days later, approx. 50% of the fingers are still attached. I pulled a few out to test and they aren't remotely loose. The colour of the solution remains a really dark brown (or possible green), borderline black.
I don't want to keep adding volume to the solution unless I need to....so the question is, do I need to? Is the solution saturated with copper, and if so, do I just keep running the bubbler and adding HCl?
Thanks for any advice.