Please help as this is driving me mad! I need to pickle pendants which need a good fifteen minutes in my citric acid pickle, but they are attached to very light silver chain which turns black when left in the pickle this long.
How can I stop this happening and how can I now sort the chain which has gone a horrible black? It's too fine to heat as it immediately melts and too fine to brush with steel wool to get its silver colour back.

Any help would be hugely appreciated, thank you!