How To Clean a Rusted Cast Iron

Learning how to clean rust from cast iron cookware is key to maintaining its longevity and performance. Cast iron, while durable, is susceptible to rust if not cared for properly. However, rest assured that rust is not the end of the line for your cookware because, with the right approach, you can remove it and restore your cast iron to top condition.

Removing rust from cast iron cookware involves a blend of hands-on scrubbing with tools like steel wool and applying chemical solutions, such as vinegar. To make the process smoother, ensure you work in a well-lit area with ample ventilation. Having a dedicated workspace will help you stay organized and focused. It begins with carefully examining the rust and collecting everything you need for the job.

After dealing with the rust, it’s very important to rinse and dry your cookware completely to avoid rust forming again. A thorough rinse will ensure no chemical residues remain, which could affect the taste of your food or the performance of the pan. Re-seasoning your pan is the final touch, refreshing its non-stick qualities and safeguarding it against future rust, ensuring it’s ready for your next cooking session.

Pre-cleaning procedure

Before attempting to remove rust from cast iron cookware, prepare the cookware and cleaning area to ensure a safe and efficient process. The following steps outline the pre-cleaning procedure:

Cast iron skillet with food residue beside a dish brush. — Photo credit: Canva.

Initial cookware assessment: Take a moment to examine the cast iron piece thoroughly. You’ll need to locate all areas affected by rust and determine the extent of rust coverage. Understanding whether you’re dealing with minor surface or more severe pitted rust will help you gauge the effort required. This step is crucial because it allows you to tailor your cleaning approach to the specific condition of your cookware, making the process more efficient.

Cookware preparation: If the cast iron has any food residue or grease, wash it off using warm, soapy water and a brush. After washing, make sure to rinse the cookware thoroughly and dry it immediately with paper towels. Taking the time to remove all food particles and grease ensures that your rust removal efforts will be more effective, as you won’t be dealing with additional contaminants.

Cleaning agent alert: Be mindful when using vinegar, as its acidic nature can damage cast iron if left in contact for too long. It’s recommended to use it cautiously and keep a close watch on the cookware throughout the rust removal process to avoid any damage. Monitoring the time your cookware spends in the vinegar solution will prevent any potential harm, allowing you to achieve optimal results without compromising the integrity of your cast iron.

Mechanical rust removal techniques

You can effectively remove rust from cast iron cookware through mechanical methods. These techniques involve physical actions and tools to scrape or rub the rust away.

Three cast iron skillets. — Photo credit: Canva.

Scrubbing with abrasives: Steel wool or sandpaper are effective options when removing rust with abrasives. It’s best to start with a coarse grade and then switch to a finer one to ensure the cookware’s surface isn’t damaged. The process involves vigorously rubbing the rusted areas and then wiping the surface with a dry cloth to remove rust particles. This method is particularly useful for tackling stubborn rust spots, providing a more hands-on approach to restoring your cookware.

Using the salt and potato method: An unexpectedly effective method involves a potato and coarse kosher salt. To use this technique, sprinkle salt over the rusted area of the cookware. Then, cut a potato in half and scrub the salt into the rust using the cut side. After scrubbing, rinse the cookware with water and then dry it well. This natural method is gentle on your cookware while still effective, making it a great option for those who prefer household items.

Using a wire brush: For more stubborn rust, a wire brush, especially one attached to a drill for added efficiency, can be very effective. To do this, first, secure the cast iron cookware to prevent it from moving. Then, using steady pressure, apply the wire brush to the rusted areas. After removing the rust, clean the area with a dry cloth to remove all rust particles. This technique is especially useful for larger cookware items, allowing you to cover more surface area quickly and efficiently.

Chemical rust removal methods

You can also effectively treat and restore cast iron cookware with chemical rust removal methods. These approaches use chemical reactions to lift and dissolve the rust, making removal easier.

Vinegar, powder rust remover and plastic brush. — Photo credit: Canva.

Utilizing a vinegar soak: Vinegar can effectively dissolve rust thanks to its mild acidity. For this method, you’ll want to mix equal parts of white vinegar and water. To avoid any unwanted chemical reactions, using a non-reactive container, like plastic or glass is essential.

Fully submerge your cast iron cookware in the prepared solution for up to 24 hours, but remember to check on it periodically. It’s important to note that leaving cast iron in the vinegar solution for too long can damage it.

After the soak, grab a non-metallic brush and scrub away any remaining rust. Make sure to rinse the cookware thoroughly afterward and dry it immediately. This step ensures that no vinegar residue remains, which could affect your food’s taste or the pan’s performance.

Applying rust removers: Commercial rust removers offer a concentrated solution to rust issues. Choose a rust remover designed specifically for your needs and follow the manufacturer’s instructions. Wear gloves and work in a well-ventilated area when using chemical rust removers. These products are formulated to tackle even the most stubborn rust, providing a powerful solution for restoring your cookware.

Rinsing and drying the cookware

After you’ve tackled how to clean rust from cast iron cookware, rinsing is your next move. Stick to warm water for the rinse, and use a soft sponge or cloth to gently clean the surface. Drying is as important as rust removal because cast iron and moisture don’t mix. Forget letting it air-dry; that’s just asking for rust to come back. Instead, pop it on the stove over low heat to zap any lingering moisture, then give it a thorough wipe-down with a clean, dry cloth, getting every spot, handle and edge.

Once the cookware is bone dry, you can season the cast iron by lightly coating it with oil or shortening using a cloth or paper towel. Rub off any excess oil to avoid a sticky finish. Next, crank your oven to a temperature between 450 and 500 F, and bake your cookware upside down to prevent pooling while using foil on the bottom rack to catch drips. Once the hour’s up, turn off the oven and let the cookware cool down inside. This method ensures an even seasoning layer, providing optimal protection and non-stick qualities. Repeat this process a couple of times for an extra robust seasoning layer before cooking something like these lemon garlic scallops for dinner tonight.

image of a scallop scooped by a spoon from a pan of lemon garlic scallops — Lemon Garlic Scallops. Photo credit: Real Balanced.

“If you take care of your cast iron pan properly, it can live forever. It’s critical to ensure that you dry it thoroughly after you wash it because any remaining water will cause it to rust. Once it’s fully dry, rub on a light layer of oil. This will protect it and ensure that your skillet never develops rust.”
— Michelle Price, Honest and Truly

Preventative measures for future rust

A proactive approach is key to preventing rust and ensuring the longevity of your cast iron cookware. Taking the time to implement these measures will save you effort in the long run and keep your cookware in prime condition. Start with proper storage by keeping your cookware in a dry environment and using a paper towel to absorb any leftover moisture. Consider placing a piece of parchment paper or cloth between stacked pans to prevent scratching and absorb any potential moisture.

Cast iron skillet with a thin layer of oil being applied by a brush. — Photo credit: Canva.

Routine maintenance is also crucial. After cleaning, apply a thin layer of oil to maintain the seasoning, and dry the cookware thoroughly, preferably by heating it on the stove to remove any moisture. Regularly inspecting your cookware for early signs of rust can help you address minor issues before they become significant problems.

Lastly, avoid common mistakes like soaking the cookware in water or using harsh detergents and metal scouring pads, which damage the seasoning and promote rust. Instead, opt for gentle cleaning methods and tools designed specifically for cast iron.

Storing Cast Iron Cookware

Proper storage of cast iron cookware ensures longevity and performance. Whether you’re a seasoned chef or just love cooking at home, knowing how to store your cast iron properly can make all the difference. Here are the best practices for keeping your cast iron in top shape, so it’s always ready for your next skillet recipes.

Stacked cast iron skillets with a dish towel. — Photo credit: Canva.

Store in a cool and dry place: Store cast iron in a cool and dry place. Avoid damp environments, as moisture can lead to rust.
Stacking cookware: When stacking multiple pieces, place a layer of paper towel between them. This prevents scratching and absorbs any residual moisture.
Use the hanging method: If you have space, hanging cast iron pieces is ideal. It keeps them dry and accessible.
Add a light coat of oil: After cleaning, apply a light coat of vegetable oil. Wipe off excess with a paper towel to prevent a sticky surface.
Avoid plastic lids: Do not store cast iron cookware with plastic lids. Plastic can trap moisture and cause rusting.
Use pot protectors: Consider using pot protectors or soft cloths to prevent scratches when stacking. These provide a buffer between each piece.
Where not to store: Avoid storing cast iron in humid areas like basements. Constant exposure to moisture leads to rust.

Proper storage techniques ensure that cast iron cookware remains in top condition. Regular maintenance and thoughtful storage go a long way in preserving these valuable kitchen tools.

Final thoughts

With all these things in mind, you can restore your cast iron cookware to its original non-stick surface. Soon it’ll be ready to make your favorite skillet dinners like creamy Tuscan chicken and creamy sun dried tomato chicken.