If the rust is only on the outside of a cast-iron pan, it is generally safe to reuse the pan after removing the rust. Cast iron is a durable and versatile material, and surface rust on the outside should not affect its functionality as long as the rust has not penetrated deeply into the cooking surface.
Here's a step-by-step guide to remove rust from the outside of a cast-iron pan:
Inspect the rust: Check the extent of the rust on the pan's exterior. If it's just light surface rust, it should be relatively easy to clean.
Scrub with steel wool or brush: Use steel wool or a stiff brush to scrub away the rust from the exterior of the pan. You may also use a mixture of baking soda and water to create a paste to aid in the cleaning process.
Rinse and dry thoroughly: Once you've removed the rust, rinse the pan with warm water and mild soap if needed. Avoid using harsh detergents that can strip away the seasoning from the cooking surface. Dry the pan completely using a clean cloth or paper towel.
Season the pan: After cleaning and drying, it's essential to season the cast-iron pan again. Seasoning involves applying a thin layer of cooking oil or vegetable shortening to the entire surface of the pan, including the exterior. Heat the pan in the oven or stovetop until the oil polymerizes and forms a protective non-stick layer.
Store properly: To prevent future rusting, store the cast-iron pan in a dry place and ensure it is completely dry before putting it away.
Remember, surface rust on the outside of the pan should not affect the safety of the cookware. However, if the rust has significantly damaged the pan, or if you notice rust on the interior cooking surface, it might be best to retire the pan or seek professional advice for repair.
Regular maintenance and seasoning of your cast-iron cookware will help prolong its life and maintain its cooking properties.