To prevent rusting of an old, unused, and stored cast-iron frying pan, you can follow these steps:
Clean the pan: If the pan has any dirt or residue on it, gently clean it using warm water and a mild dish soap. Use a soft sponge or brush to remove any debris. Avoid using abrasive cleaners or steel wool, as they can damage the pan's surface.
Thoroughly dry the pan: After cleaning, ensure the pan is completely dry. You can use a cloth or paper towels to remove any moisture. Moisture is the primary catalyst for rust formation, so it's crucial to eliminate it.
Apply a thin layer of oil: Coat the entire surface of the pan, including the interior and exterior, with a thin layer of oil. You can use vegetable oil, canola oil, or any cooking oil with a high smoke point. Make sure the layer of oil is even and covers the entire surface.
Store in a dry place: Find a cool, dry place to store the cast-iron pan. Ideally, the storage area should have low humidity to minimize the chances of rust formation. Avoid storing the pan in a damp basement, near a sink, or in a humid environment like the kitchen or bathroom.
Use desiccants or moisture absorbers: Consider placing desiccant packets or moisture absorbers near the stored pan. These can help absorb any excess moisture in the air and further reduce the risk of rust.
Check periodically: Even with proper precautions, it's a good idea to periodically check on the pan. Every few months, inspect the stored pan for any signs of rust or moisture. If you notice any rust spots, clean and re-season the pan to restore its protective coating.
By following these steps, you can significantly minimize the chances of rust formation on your old, unused, and stored cast-iron frying pan.