A properly seasoned cast-iron skillet should not rust easily, as the seasoning process creates a protective layer on the pan's surface. However, there are factors that can contribute to rusting, such as exposure to moisture, improper storage, or neglecting to maintain the seasoning.
Using flaxseed oil and vinegar for seasoning is a popular method that can create a durable and effective seasoning. However, the exact timeframe for rust to develop after seasoning can vary depending on the conditions and care of the pan.
If a cast-iron skillet seasoned with flaxseed oil and vinegar starts to rust, it could be due to one of the following reasons:
Insufficient seasoning: The initial seasoning might not have been applied thoroughly or evenly, leaving some areas more susceptible to rusting.
Exposure to moisture: Cast iron is vulnerable to rust when exposed to moisture. If the pan is not dried properly after cleaning or if it's stored in a damp environment, rust can develop.
Lack of regular maintenance: Seasoning needs to be maintained regularly to prevent rust. If the skillet is not properly cared for, the protective layer can wear off, leaving the metal exposed to moisture.
To prevent rust from occurring or reoccurring on your cast-iron skillet, it's important to follow these guidelines:
Dry the skillet thoroughly after each use to remove any moisture. You can place it on a stovetop burner over low heat to evaporate any remaining moisture.
Avoid soaking the pan in water or leaving it submerged. Instead, hand wash it with a mild dish soap, warm water, and a non-abrasive brush or sponge.
After washing, dry the skillet completely, and then apply a thin layer of cooking oil or fat to the surface. This helps maintain the seasoning and protect against moisture.
Store the skillet in a dry place. If you stack multiple pans, place a paper towel or a cloth between them to prevent moisture accumulation.
With proper care and maintenance, a well-seasoned cast-iron skillet should resist rusting for a long time. However, if you notice any signs of rust, it's essential to address it promptly. You can remove rust by scrubbing the affected area with steel wool or a scrub brush, then re-season the skillet to restore its protective coating.