Rust preventive oil is a light orange liquid with a room-temperature specific gravity of 0.68-0.85 kg/L. It exhibits strong rust and salt spray resistance, forming a dense protective film on metal surfaces such as copper, iron, and stainless steel. The film has strong adhesion, effectively preventing external substances from corroding the metal. The protective layer is resistant to scratching, does not affect electrical conductivity or welding, and prevents workpieces from sticking together. It offers excellent anti-fingerprint, anti-discoloration, waterproof, and anti-oxidation properties. It is used at room temperature in its original liquid form and requires simple equipment (one centrifuge, one plastic container, one plastic barrel, and one sieve screen). It is highly convenient to use and cost-effective, making it an ideal sealing material for rust and salt spray prevention. **Suitable Workpieces:** Various hardware standard parts, stamped parts, screws, nuts, eyelets, springs, rivets, electronic components, and other hardware products. **Target Customers:** Electroplating factories, surface treatment plants, hardware factories; metals such as copper, iron, and stainless steel; plating types including nickel, electroless nickel, chromium, blackening, and tin. **Operation Process:** Electroplated workpieces are washed, passivated, and dried, then immersed in 913 sealing agent, air-dried, and packaged.