Passivation of Stainless Steel * Passivation of Stainless Steel: Process & Benefits - Passivation is a chemical treatment used to enhance the corrosion resistance of stainless steel by removing free iron and forming a protective oxide layer. This process is widely used in industries like aerospace, medical, food processing, and manufacturing. 1. Why Passivation? - Removes Free Iron: Eliminates contaminants from machining, handling, or fabrication. - Enhances Corrosion Resistance: Forms a passive chromium oxide layer that prevents rust. - Improves Cleanliness: Reduces contamination risks in critical applications (e.g., medical and food-grade stainless steel). 2. Passivation Process Step 1: Surface Preparation Cleaning: Remove dirt, oil, and grease using an alkaline cleaner or degreaser. Mechanical Treatment (If Needed): Grinding, blasting, or pickling may be required for heavy contaminants. Step 2: Chemical Passivation Treatment Submerge in Acid Bath: Stainless steel is immersed in a passivating solution (usually nitric acid or citric acid). #Passivation Chemical Manufacturer.