Soak in citric acid solution

Dissolve 2-3 tablespoons of citric acid powder per gallon of hot water. Submerge the rusty item and soak for 2-12 hours depending on severity. Scrub with a brush, rinse thoroughly, dry, and oil.

Why It Works

Citric acid is a chelating agent that binds to iron oxide and pulls it away from the metal surface. It works faster than vinegar and is food-safe, making it suitable for kitchen tools and cookware.

Tips

• Available in the canning section of grocery stores or online for about $5-8 per pound
• Hot water significantly speeds up the reaction
• Works well on cast iron skillets, garden tools, and kitchen knives
• Rinse thoroughly — citric acid residue can cause discoloration if left on some metals
• Faster than vinegar (hours vs overnight) but slightly more expensive