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How to Prevent Rust in Metal Hardware During Sea Freight

Release time：

2024-08-19

With the growth of the economy, the import and export of metal products in China is increasing. A significant portion of these metal products opt for sea freight due to its advantages of large capacity and relatively low cost compared to other modes of transportation. However, the transportation time is also longer.

During the sea freight process, goods often have to withstand the test of adverse environments such as humidity and salt spray, making rust prevention measures crucial. Rust-preventive oil, as an important means to protect metal products from corrosion, is a key factor that affects equipment safety and transportation efficiency.

Sea freight poses a significant challenge for metal hardware products due to humidity and salt spray, especially with the long transportation time and the prolonged exposure to salt spray, which can lead to rust if proper rust prevention measures are not taken. Common rust prevention methods for sea freight include rust-preventive oil, vacuum packaging, or nitrogen filling. However, vacuum packaging and nitrogen filling are more expensive, and unless the product's special requirements necessitate it, most suppliers generally do not use these methods.

Most hardware suppliers apply a layer of rust-preventive oil to their hardware. Besides being more cost-effective compared to other methods, another reason is that rust-preventive oils have become very mature in development. There are also rust-preventive oils specifically designed for sea transportation, which not only offer long-lasting rust protection but also have undergone extensive salt spray testing, fully meeting the requirements of sea freight.

Long-lasting rust-preventive oils are made from high-quality base oils, combined with various chemical additives, and produced using special manufacturing processes. They form a non-drying thin film on the unprotected metal surface, protecting it from moisture and corrosive gases.

Widely used for the preservation and rust prevention of electroplated products, cutting tools, measuring tools, precision instruments, various precision hardware, furniture hardware, gears, molds, precision machinery, production lines, construction machinery, and other products, these oils also have excellent lubricating properties and can be used as a daily rust-preventive lubricant for hardware.

Classification of Common Rust-Preventive Oils for Metal Hardware Processing:

Thin Film Rust-Preventive Oil forms a thin rust-preventive film with less usage, does not affect the product's appearance, is easy to clean, and has good rust-preventive properties. It is suitable for rust prevention between processes and for storage in metal hardware as well as automotive and electronic industry components.
Displacing Rust-Preventive Oil has dewatering properties, suitable for hardware parts that are not completely dried after cleaning, capable of displacing moisture, and easy to clean in subsequent processes, commonly used for rust prevention between processes and for storage.
Water-Based Rust Inhibitors Used by diluting with water, low cost, widely used for rust prevention between processes for ferrous metals, alloy steels, and non-ferrous metal products, with a short rust-preventive period.