Vegetable beds are made from corten steel, a rust-resistant material. Rustproof steel is also called rust-resistant steel. Corten steel vegetable planters is approved for use in vegetable gardens.
During that process, a strong chemical bond is formed, making it very resistant to rust. Corten steel is typically made through the electrolysis process, which dissolves iron and copper in water.
Corten steel is commonly used for vegetable beds. In the last 50 years, it has been widely used. However, the use of corten steel for vegetable beds has increased recently.
Corten steel lasts for a long time. However, this material is not advisable to use in regions near the ocean and humid or foggy areas. The protective layer of the patina may continue to corrode and weaken structurally instead of being stabilized.