doesn'tmatter
New member
- Joined
- Feb 13, 2018
- Messages
- 3
Hello all,
This is my first post on the forum. My question is all those members who have experience scrapping of silver from silver coated scrap.
I have been trying to scrape off the silver coated on a copper base and have done the following experiment multiple times but barely see any result:
1) Approx. 100 g of silver coated scrap is dipped in 20 mL Nitric (AR grade, 70%) and Distilled water (20 mL).
2) I heat the solution until all the brown gas (NO2) is eliminated.
3) Then I let it sit for like 5 min.
4) Add a pinch of table salt (sodium chloride)
But I am NOT seeing any milky precipitating activity going on! Instead, I see those salt granules turn green just for few seconds before they dissolve in solution. Does anybody know where I might be going wrong? I am 100% confident that the metal coated is silver only as I got it chemically tested at a lab. Please share your experiences if you have dealt with this stuff before. Thanks!
This is my first post on the forum. My question is all those members who have experience scrapping of silver from silver coated scrap.
I have been trying to scrape off the silver coated on a copper base and have done the following experiment multiple times but barely see any result:
1) Approx. 100 g of silver coated scrap is dipped in 20 mL Nitric (AR grade, 70%) and Distilled water (20 mL).
2) I heat the solution until all the brown gas (NO2) is eliminated.
3) Then I let it sit for like 5 min.
4) Add a pinch of table salt (sodium chloride)
But I am NOT seeing any milky precipitating activity going on! Instead, I see those salt granules turn green just for few seconds before they dissolve in solution. Does anybody know where I might be going wrong? I am 100% confident that the metal coated is silver only as I got it chemically tested at a lab. Please share your experiences if you have dealt with this stuff before. Thanks!