How to prevent rust on metal cutting edges? Especially for galvanized sheets, the cut edges tend to rust quickly, whether laser cutting or punch press is used.

Galvanized sheet cross-sections are prone to galvanic corrosion between zinc and iron, leading to rust. It is essential to clean them thoroughly after cutting and then implement appropriate rust prevention measures, which should be based on the usage or storage conditions.

For temporary rust prevention, you can wrap the cut surface with vapor corrosion inhibitor paper, apply rust-inhibiting oil, or use peelable rust-proof plastic, rust-proof pressure-sensitive adhesive, rust-proof film, etc. (Nantong Yongyu Rust Prevention Materials Co., Ltd.). You can also paint the cut surface and add rust-proof film packaging.