Removing rust from razor blades is a quick job that need not require a lot of effort. However, caution should be taken while cleaning them because of their sharp edges. Be sure to wear gloves to protect your hands from cuts. It is best to not allow a razor blade to get rusty in the first place, but if you do have a rusty blade that you would like to salvage, a careful soaking and scrubbing process will make it shine again.
Mix baking soda and water together to form a nice thick paste. It should be solid enough that it can stick to the razor without running off.
Cover the razor in the paste and let it sit for 20 to 30 minutes. The basic properties of the baking soda will eat away at the rust and loosen it up.
Rinse the razor so you can see the rust. You may notice that a lot of it washes away with the water.
Use steel wool or a toothbrush to carefully scrub away at the remaining rust. It should fall away easily.
Rinse the razor again once all of the rust is scrubbed away.
Dry the razor thoroughly. The main cause of rust is that the metal object is left wet. By drying your razor every time, you will avoid rust for a longer period of time.
Repeat all of the steps if there is still rust visible on your razor. If rust spots remain it may be because the baking soda paste was unable to get to the deepest parts of the rust.
It is easy for a rusty razor to be damaged. Make sure that there are no small chips or nicks in the metal before shaving with it so you don't hurt your skin. If you are unsure if it is safe, dispose of the razor and replace it. A rusty razor can still be very sharp. Use caution while scrubbing it.