Yes, it is necessary to remove rust from cast iron before using it again for cooking. Rust can affect the flavor of food and compromise the integrity of the pan. Additionally, consuming rust is not safe for your health.
To remove rust from cast iron, you can follow these steps:
Scrub the rusted areas: Use a scrub brush or steel wool to scrub away the rust from the affected areas of the cast iron pan. Apply some mild dish soap and water to help with the process. Ensure you scrub thoroughly to remove as much rust as possible.
Rinse and dry the pan: Once you've scrubbed away the rust, rinse the pan with water to remove any residue. Dry it thoroughly using a towel or by placing it on the stove over low heat until all moisture evaporates. It's essential to dry the pan completely to prevent further rusting.
Season the cast iron: Seasoning is an important step to maintain and protect the cast iron's surface. Seasoning involves applying a thin layer of oil or fat to the pan and baking it at a high temperature. This process helps create a protective coating on the cast iron, preventing rust and enhancing its nonstick properties. Refer to the manufacturer's instructions or search for a suitable cast iron seasoning method for specific guidelines.
Regular maintenance and seasoning of cast iron cookware can help prevent rusting and keep it in good condition for long-term use.