What is how to get rust off cast iron?

Here's some information on removing rust from cast iron:

Rust on cast iron is a common issue, but thankfully, it's usually treatable. Here's a breakdown of how to tackle it:

  • Assessing the Rust: First, determine the severity of the rust. Light surface rust is easier to remove than deep, pitted rust.

  • Removal Methods: Several methods can be used to remove rust, each with varying degrees of abrasiveness:

    • Vinegar Soak: Submerge the cast iron in a 50/50 solution of white vinegar and water for no more than 30 minutes to an hour at a time. Check frequently. The acid in the vinegar loosens the rust. After soaking, scrub with steel wool or a scouring pad. Rinse thoroughly and dry immediately.
    • Baking Soda Paste: Make a paste of baking soda and water. Apply it to the rusted areas and scrub with a scouring pad or brush. Rinse thoroughly and dry immediately.
    • Salt and Potato: Cut a potato in half and sprinkle the cut side with salt. Use the potato as a scrubber, adding more salt as needed. The oxalic acid in the potato helps dissolve the rust. Rinse thoroughly and dry immediately.
    • Steel Wool/Scouring Pad: For stubborn rust, use steel wool or a scouring pad. Be cautious, as these can scratch the surface. Use a circular motion and apply moderate pressure.
    • Electrolytic Rust Removal: This is a more advanced method that uses electricity to remove rust. It requires some specialized equipment and knowledge. Handle with caution.
  • Important Considerations:

    • Avoid Abrasive Cleaners: Harsh abrasive cleaners can damage the cast iron's surface.
    • Dry Immediately: Thoroughly drying the cast iron after cleaning is crucial to prevent new rust from forming. Use a towel and then heat the pan in the oven or on the stovetop to ensure complete dryness.
    • Seasoning: After removing the rust, you must re-season the cast iron to protect it and prevent future rusting. See the note below.
  • Re-Seasoning: This is the most important step. After cleaning, coat the cast iron with a thin layer of oil (like vegetable oil, canola oil, or flaxseed oil) and bake it in the oven at a high temperature (350-450°F) for an hour. This creates a protective, non-stick coating.