This is a really interesting article about removing rust via electrolysis. I know a lot of our readers like to re-use and recycle old parts, and sometimes that involves removing a lot of rust.
There are various obvious methods of rust removal, but these methods are unsuitable for very old or valuable artifacts as they tend to be destructive in use, meaning that along with the rust some of the base metal is also removed. Dissolving the rust with acids such as phosphoric acid or even vinegar can produce good results, but this process removes any surface features which may have been preserved in the rust.
Read a lot more about Rust Removal Using Electrolysis
HOW TO – Electrolytic rust removal