Rust on kitchen knives is a common issue that can be preventable with proper care. Stainless steel knives can still rust if not cared for correctly, as they are rust-resistant but not rustproof. Knives with lower quality stainless steel containing less chromium are more prone to rusting faster. On the other hand, carbon steel knives can rust quickly but can be very sharp. When the protective layer of a knife is disrupted, the iron in the blade reacts with moisture and oxygen, leading to the formation of iron oxide, or rust.
One common culprit for rust formation is the dishwasher. If knives are not thoroughly dried after washing, exposure to air and humidity can accelerate the oxidation process. Hard water in the dishwasher can cause limescale and mineral deposits, acting as a catalyst for corrosion and rust on metal items like knives.
To prevent rust on kitchen knives, it is crucial to keep them dry to avoid excess moisture. After cleaning, wipe the knives thoroughly and store them in a dry place, such as a knife block or protective sheath. Avoid washing knives in the dishwasher and instead hand-wash them separately with hot, soapy water. If using a dishwasher, wash the knives on the top rack without other items, use a mild detergent, and do not let the dishwasher dry the knives with heat—remove and dry them with a towel. Regularly clean the dishwasher to remove mineral buildup that can accelerate rust formation.
To keep your knives in top condition, avoid using salty or acidic foods that can damage the protective layer and increase the risk of rust. Carbon steel knives should never be put in the dishwasher; always hand wash them and apply a light layer of mineral oil after drying to prevent rust.
For removing rust from kitchen knives, soak the affected area in white vinegar for a few minutes to a few hours, then gently scrub with a soft sponge or cloth. For stubborn spots, use a mild abrasive like steel wool after the vinegar soak. Ensure the knife is fully dried after cleaning to prevent future rusting. Refer to the manufacturer’s instructions for specific cleaning methods, especially for high-quality blades.
For more tips, you can read the original article on Better Homes & Gardens.
