If a cast iron pan has rusted through on the bottom, it may not be safe to continue using it for cooking. Rust can weaken the structural integrity of the pan and may lead to further deterioration, making it prone to breakage or even releasing rust particles into your food.
While there are methods to remove rust from cast iron pans and reseason them, a rusted-through bottom is a more serious issue. If the rust has caused the pan to develop holes or thin spots, it can compromise its functionality and pose potential health risks.
If the pan is extensively rusted through on the bottom, it's generally recommended to replace it rather than continue using it. Rusting through indicates significant damage that cannot be easily repaired. Using a damaged pan may result in uneven heating, poor cooking performance, and potential safety hazards.
To prevent future rusting and maintain the quality of your cast iron cookware, it's important to follow proper care and maintenance practices. This includes drying the pan thoroughly after each use, seasoning it regularly with a thin layer of oil, and storing it in a dry place.
Consider replacing the rusted-through cast iron pan with a new one to ensure optimal cooking performance and safety.