The cylinder is fully wrapped in anti-rust bags, creating a relatively sealed environment. Within this enclosed space, the anti-rust packaging gradually releases vapor-phase anti-rust molecules that adhere to the metal surface, isolating metal corrosion factors in the air from affecting the metal products. The anti-rust cylinder bags offer antioxidant properties, extending the lifespan of the cylinder.

The cylinder anti-rust bags boast excellent tear resistance, contain no recycled material, and are environmentally friendly and recyclable.

For automakers, engine cylinder blocks are typically made of cast iron, and any cast iron part tends to rust. As the main power source of a vehicle, the cast iron engine's cylinder block is coated with anti-rust protection, making it less prone to rust.

For engine manufacturers, the anti-rust coating on the engine cylinder surface cannot guarantee complete prevention of rust factors before reaching the car factory. While aluminum alloy engines are gradually replacing cast iron engines, cast iron engine cylinders still have their advantages, such as higher hardness, resistance to deformation, and tolerance for high pressure. Moreover, their cost of use is lower than that of aluminum alloys, which is one of the reasons many engines are still made of cast iron.

Why do some manufacturers' cast iron engine cylinder blocks resist rust better than others? The reason lies in their superior rust prevention measures, which not only involve applying rust-proof products to the surface of the cylinder blocks but also include rust protection during storage and transportation to avoid uncontrollable environmental factors increasing the likelihood of rust.

Vapor phase corrosion inhibition technology is commonly used for packaging to prevent rust. For the transportation corrosion prevention of engine cylinder blocks, it is recommended to use corrosion inhibitor films or bags that meet the GB/T 16267 standard for vapor phase corrosion inhibitor material testing. This corrosion inhibitor material offers strong corrosion prevention properties, providing a rust-free period of 1-2 years. "Yongyu" brand corrosion inhibitor films or bags meet this standard for vapor phase corrosion inhibition, making them a reliable choice for the corrosion prevention packaging of engine cylinder blocks.