Wash off the silver coating in concentrated sulfuric acid.

[anarxi]

used:
2 glasses with a capacity of 1 liter.
700 milliliters sulfuric acid 92%
80 milliliters nitric acid 58%
Tap water for rinsing: about 15 liters.

base material
copper, brass, bronze with silver plating.

 

[4metals]

OK you have created a pretty strong solution that effectively and selectively will strip Silver plating. Now how are you recovering the Silver from the solution? Half of a solution to a problem is as bad as no solution.

 

[anarxi]

OK you have created a pretty strong solution that effectively and selectively will strip Silver plating. Now how are you recovering the Silver from the solution? Half of a solution to a problem is as bad as no solution.

Well, I didn't create it.
This is an old classic solution from the beginning of the last century.
at least.
in the classics, for 19 parts of sulfuric acid there is 1 part of nitric acid.
transformation of silver through chloride.
the solution (a mixture of acids + dissolved metals, silver and tin, zinc, possibly bismuth) is simply poured into salt water.
I pour it into a canister containing water from previous work.
through the neck into which the watering can is inserted.
sulfuric acid and water, as you know, behave violently when combined.
you need a gas mask (or goggles and a respirator) and rubber, durable gloves.

 

[4metals]

you need a gas mask (or goggles and a respirator) and rubber, durable gloves.

Thank you for highlighting this. It is exactly why I never recommend the method.