Common types of high-strength bolt rust-preventive oils include sealing rust-preventive oils, thin-film rust-preventive oils, displacement rust-preventive oils, water-dilutable rust-preventive oils, and vapor-phase rust-preventive oils, suitable for different environments and protection cycle requirements. These rust-preventive oils effectively prevent rust by forming a protective film on the metal surface, isolating moisture and oxygen.
Main Types and Applicable Scenarios
Sealing Rust-Preventive Oils
Features: Thicker oil film, long rust prevention period, up to 2-3 years; some products have a salt spray resistance of up to 1000 hours.
Applications: Long-term storage, sea transport, or sealing protection for high-strength bolts in humid and hot environments.
Application Method: Dip or brush and then seal in packaging. Recommended for use with aluminum-plastic film or VCI rust-proof bags.
Thin-Film Rust-Preventive Oils
Features: Low viscosity, uniform coating, easy to clean, does not affect subsequent welding or painting processes.
Applications: Short-term rust prevention between processes or precision bolts requiring high surface cleanliness.
Environmental Trends: Some products use bio-based biodegradable raw materials with a biodegradability rate exceeding 90%.
Displacement-type Rust Inhibitor
Features: Automatically replaces moisture and fingerprints on metal surfaces, possessing dehydration capabilities.
Applications: Inter-process protection for bolts requiring immediate rust prevention after water-based cleaning or processing.
Advantages:Achieves "dehydration + rust prevention" in one step, improving efficiency.
Water-dilutable Rust Inhibitor
Features: Diluted with water before use, low cost, high safety, suitable for large-scale spraying operations.
Applications: Rapid rust prevention treatment of large batches of bolts on factory production lines.
Vapor Phase Inhibitor (VCI type)
Features: Volatile corrosion inhibitors form a protective atmosphere in confined spaces, comprehensively covering complex structures.
Applications: High-strength bolts that require continued protection after packaging, especially suitable for irregularly shaped parts or mixed sets of multiple parts.
