How to Remove Rust from Keys?

[Games]

Methods for removing rust from keys include: 1. Vinegar Soaking Method: If there is not much rust on the key, you can soak the rust in vinegar to loosen it, then wipe it off with a cloth. Soaking time should be between half an hour to one hour, using enough vinegar to completely submerge the key; 2. Chemical Rust Removal: Soak the rusty key in a sodium hydroxide solution. The rust reacts with the solution to form iron hydroxide precipitate, while the iron does not react with sodium hydroxide, thus removing the rust; 3. Sandpaper Polishing: Fold the sandpaper and place the key between two layers of sandpaper, then rub it back and forth; 4. Wire Mesh Polishing: This method is suitable for keys with a lot of rust. Use a wire mesh (like those used for scrubbing pots) dipped in water to polish the key, intermittently rinsing off the rust with water. Once most of the rust is removed, soak the key in vinegar again, then dry it with a cloth.