How to Remove Rust from Stainless Steel: A Practical Guide Many people believe stainless steel never rusts — but that's not entirely true. While it’s far more resistant to corrosion than regular steel, it can still develop rust spots under certain conditions. The good news? You can clean it up and keep your stainless steel looking new with the right methods. Why Does Stainless Steel Rust? Stainless steel contains chromium, which forms a thin, invisible film of chromium oxide on the surface. This layer protects the metal from oxygen and moisture. However, when that layer is damaged, rust can form. Here are some common causes: Chlorides (like salt or bleach): These can break down the protective layer. Poor ventilation: Limited oxygen can prevent the oxide film from regenerating. Harsh chemicals: Strong acids or alkaline cleaners can eat away the surface. Incorrect material choice: Using lower-grade steel (like 304) in harsh environments can lead to corrosion. ...