Cast iron is iron with a high carbon content; other additives such as chromium or nickel are not included. And, as you know, carbon does not protect cast iron cookware from corrosion. For cast iron, the protective film is a carbon film that occurs during cooking. It is a kind of non-stick coating.
It is for this reason that cast iron utensils cannot be cleaned “to the metal”, removing this natural protective layer. Proper care of cast iron cookware also requires hand washing, a soft sponge, warm or hot water, you can also use a non-metallic brush. It is very important to wipe the cast iron dry immediately after washing. For storage, you need to grease the inner surface of the dishes with vegetable oil, and before use, you need to heat it well. Continue reading