Wingedcloud
Well-known member
- Joined
- Nov 6, 2014
- Messages
- 96
Hello everyone.
I have been handed some samples of the following plated blocks of metal.
I am told the gold plated one is nickel base and the silver ones are aluminum base.
I was wondering if someone could point out some effective ways of stripping these blocks of the PM. Don't need it to be fast, altough I have several kg of each type.
I read that if the gold plated block was aluminum, I could use conc. nitric, as the acid would form a passivation layer on the aluminum, dissolving only a layer of nickel that might be between it and the gold plating, leaving the plating to float around and be filtered.. Don't know if the same principle applies if the metal is nickel instead of aluminum.
As for the silver plating, I was thinking about the same process, but wanted some input on it, if anyone is able.
Thanks in advance!!
Winged.
I have been handed some samples of the following plated blocks of metal.
I am told the gold plated one is nickel base and the silver ones are aluminum base.
I was wondering if someone could point out some effective ways of stripping these blocks of the PM. Don't need it to be fast, altough I have several kg of each type.
I read that if the gold plated block was aluminum, I could use conc. nitric, as the acid would form a passivation layer on the aluminum, dissolving only a layer of nickel that might be between it and the gold plating, leaving the plating to float around and be filtered.. Don't know if the same principle applies if the metal is nickel instead of aluminum.
As for the silver plating, I was thinking about the same process, but wanted some input on it, if anyone is able.
Thanks in advance!!
Winged.